01-osn 7500 product description

OptiX OSN 7500 Product Description Contents

Issue 04 (2007-12-10) Huawei Technologies Proprietary i

Contents

1 Overview of the OptiX OSN 7500...........................................................................................1-1

2 Functions......................................................................................................................................2-1 2.1 Capacity ........................................................................................................................................................2-3

2.1.1 Cross-Connect Capacity.......................................................................................................................2-3 2.1.2 Slots Access Capacity ..........................................................................................................................2-3 2.1.3 Integration Design................................................................................................................................2-5

2.2 Service...........................................................................................................................................................2-5 2.2.1 SDH .....................................................................................................................................................2-5 2.2.2 PDH Service ........................................................................................................................................2-6 2.2.3 Ethernet Services .................................................................................................................................2-6 2.2.4 Ethernet Ring Services.........................................................................................................................2-6 2.2.5 ATM Services.......................................................................................................................................2-6 2.2.6 DDN Services ......................................................................................................................................2-6 2.2.7 SAN and Video Services......................................................................................................................2-6 2.2.8 Service Access Capability ....................................................................................................................2-7

2.3 Interface ........................................................................................................................................................2-8 2.3.1 Service Interface ..................................................................................................................................2-8 2.3.2 Administration Interface ......................................................................................................................2-8

2.4 Networking....................................................................................................................................................2-9 2.5 Protection ....................................................................................................................................................2-11

2.5.1 Equipment Level Protection...............................................................................................................2-11 2.5.2 Network Level Protection ..................................................................................................................2-12

2.6 Clock ...........................................................................................................................................................2-13 2.7 Intelligent Features......................................................................................................................................2-13 2.8 Built-in WDM Technology..........................................................................................................................2-13 2.9 Remote Pumping Amplifier System............................................................................................................2-14 2.10 Intelligent Power Adjustment....................................................................................................................2-14 2.11 External Clock Output Shutdown Function...............................................................................................2-15 2.12 Resilient Packet Ring ................................................................................................................................2-15 2.13 REG Function............................................................................................................................................2-15 2.14 Board Version Replacement ......................................................................................................................2-17 2.15 TCM ..........................................................................................................................................................2-17

Contents OptiX OSN 7500

Product Description

ii Huawei Technologies Proprietary Issue 04 (2007-12-10)

2.16 E13 Function .............................................................................................................................................2-17 2.17 Network Management Information Interworking .....................................................................................2-18

3 Hardware .....................................................................................................................................3-1 3.1 Hardware Structure .......................................................................................................................................3-2 3.2 Cabinet ..........................................................................................................................................................3-3 3.3 Subrack..........................................................................................................................................................3-5

3.3.1 Subrack Structure.................................................................................................................................3-5 3.3.2 Slot Layout...........................................................................................................................................3-6

3.4 Boards ...........................................................................................................................................................3-8 3.4.1 Type......................................................................................................................................................3-8 3.4.2 Boards and Available Slots.................................................................................................................3-10 3.4.3 SDH Interface Unit ............................................................................................................................3-15 3.4.4 PDH Interface Unit ............................................................................................................................3-17 3.4.5 Data Service Interface Unit................................................................................................................3-18 3.4.6 DDN Service Processing Unit............................................................................................................3-19 3.4.7 WDM Unit .........................................................................................................................................3-20 3.4.8 Optical Power Amplifying Unit .........................................................................................................3-20 3.4.9 Auxiliary Unit ....................................................................................................................................3-20

4 Software .......................................................................................................................................4-1 4.1 Overview.......................................................................................................................................................4-2 4.2 Board Software..............................................................................................................................................4-2 4.3 NE Software ..................................................................................................................................................4-3 4.4 NM Software.................................................................................................................................................4-4 4.5 Intelligent Software.......................................................................................................................................4-4

5 Data Features...............................................................................................................................5-1 5.1 Ethernet Features...........................................................................................................................................5-2

5.1.1 Function ...............................................................................................................................................5-2 5.1.2 Application...........................................................................................................................................5-6 5.1.3 Protection ...........................................................................................................................................5-10

5.2 RPR Features...............................................................................................................................................5-13 5.2.1 Function .............................................................................................................................................5-14 5.2.2 Application.........................................................................................................................................5-17 5.2.3 Protection ...........................................................................................................................................5-19

5.3 ATM Features ..............................................................................................................................................5-23 5.3.1 Functions............................................................................................................................................5-23 5.3.2 Application.........................................................................................................................................5-25 5.3.3 Protection ...........................................................................................................................................5-28

5.4 SAN Features ..............................................................................................................................................5-29 5.5 DDN Feature ...............................................................................................................................................5-30

5.5.1 Function .............................................................................................................................................5-30 5.5.2 Application.........................................................................................................................................5-31


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6 Intelligent Features....................................................................................................................6-1 6.1 Topology Auto-Discovery .............................................................................................................................6-2

6.1.1 Control Link Auto-Discovery ..............................................................................................................6-2 6.1.2 TE Link Auto-Discovery......................................................................................................................6-2

6.2 End-to-End Service Configuration................................................................................................................6-3 6.3 Mesh Networking Protection and Restoration ..............................................................................................6-4 6.4 Service Level Agreement ..............................................................................................................................6-5

6.4.1 Diamond Services ................................................................................................................................6-6 6.4.2 Gold Services .......................................................................................................................................6-9 6.4.3 Silver Service .....................................................................................................................................6-11 6.4.4 Copper Services .................................................................................................................................6-12 6.4.5 Iron Services ......................................................................................................................................6-13 6.4.6 Tunnel Services..................................................................................................................................6-13

6.5 Service Association .....................................................................................................................................6-15 6.6 Service Optimization...................................................................................................................................6-16 6.7 Equilibrium of Network Traffic ..................................................................................................................6-16 6.8 The Shared Risk Link Group.......................................................................................................................6-17 6.9 ASON Trail Group ......................................................................................................................................6-17

6.9.1 LCAS .................................................................................................................................................6-17 6.9.2 ASON Trail Group .............................................................................................................................6-18

6.10 Service Migration......................................................................................................................................6-18 6.10.1 Service Migration between ASON Trails and Permanent Connections ...........................................6-18 6.10.2 Service Migration between ASON Trails.........................................................................................6-18

6.11 Reverting Services to Original Routes ......................................................................................................6-18 6.12 Encrypting Protocols .................................................................................................................................6-19

7 Protection.....................................................................................................................................7-1 7.1 Equipment Level Protection..........................................................................................................................7-2

7.1.1 TPS Protection for Service Processing Boards ....................................................................................7-2 7.1.2 1+1 Protection for the N1EMS4 and N1EGS4 ....................................................................................7-3 7.1.3 1+1 Backup for ATM Interface Boards................................................................................................7-4 7.1.4 Protection for the Wavelength Conversion Unit ..................................................................................7-4 7.1.5 1+1 Backup for the Cross-Connect and Timing Unit...........................................................................7-5 7.1.6 1+1 Backup for the SCC Unit ..............................................................................................................7-5 7.1.7 1+1 Backup for the Power Input Unit ..................................................................................................7-6 7.1.8 1:N Protection for Board +3.3 V Power Supply...................................................................................7-6 7.1.9 Intelligent Fans.....................................................................................................................................7-6 7.1.10 Abnormality-Specific Board Protection .............................................................................................7-6

7.2 Network Level Protection .............................................................................................................................7-7 7.2.1 Linear MSP ..........................................................................................................................................7-7 7.2.2 MSP Ring.............................................................................................................................................7-8 7.2.3 SNCP ...................................................................................................................................................7-9

Contents OptiX OSN 7500

Product Description

iv Huawei Technologies Proprietary Issue 04 (2007-12-10)

7.2.4 DNI ....................................................................................................................................................7-13 7.2.5 Fibre-Shared Virtual Path Protection .................................................................................................7-15 7.2.6 MS-Shared Optical Path Protection ...................................................................................................7-15 7.2.7 Protection of Resilient Packet Ring ...................................................................................................7-16 7.2.8 VP-Ring/VC-Ring Protection ............................................................................................................7-18

8 Clock.............................................................................................................................................8-1 8.1 Clock Sources................................................................................................................................................8-2

8.1.1 External Clock Source .........................................................................................................................8-2 8.1.2 Line Clock Source................................................................................................................................8-2 8.1.3 Tributary Clock Source ........................................................................................................................8-2 8.1.4 Internal Clock Source ..........................................................................................................................8-2

8.2 Clock Working Mode ....................................................................................................................................8-2 8.2.1 Locked Mode .......................................................................................................................................8-3 8.2.2 Hold-Over Mode..................................................................................................................................8-3 8.2.3 Free-Run Mode ....................................................................................................................................8-3

8.3 Clock Outputs................................................................................................................................................8-3 8.4 Clock Protection............................................................................................................................................8-3

8.4.1 Clock Configuration with SSM Disabled.............................................................................................8-3 8.4.2 Clock Configuration with Standard SSM Enabled...............................................................................8-4 8.4.3 Clock Configuration with Extended SSM Enabled..............................................................................8-5

8.5 Tributary Retiming ........................................................................................................................................8-6 8.5.1 Principle of Retiming ...........................................................................................................................8-6 8.5.2 Application of Retimin.........................................................................................................................8-7 8.5.3 Boards Supporting Retiming................................................................................................................8-8

9 OAM .............................................................................................................................................9-1 9.1 Operation and Maintenance ..........................................................................................................................9-2 9.2 Administration...............................................................................................................................................9-2

9.2.1 ECC over DCC ....................................................................................................................................9-3 9.2.2 IP over DCC.........................................................................................................................................9-4 9.2.3 OSI Over DCC.....................................................................................................................................9-5

9.3 Security Management....................................................................................................................................9-7

10 Technical Specifications .......................................................................................................10-1 10.1 Optical Interface Performance...................................................................................................................10-2

10.1.1 Interface Type ..................................................................................................................................10-2 10.1.2 SDH Optical Interface......................................................................................................................10-2 10.1.3 Ethernet Optical Interface ................................................................................................................10-7 10.1.4 ATM Optical Interface .....................................................................................................................10-8 10.1.5 LASER level ....................................................................................................................................10-9

10.2 Electrical Interface Performance ...............................................................................................................10-9 10.2.1 PDH Electrical Interface ..................................................................................................................10-9 10.2.2 DDN Interface................................................................................................................................10-10


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10.2.3 Auxiliary Interface .........................................................................................................................10-10 10.3 Clock Performance..................................................................................................................................10-12

10.3.1 Clock Interface Type......................................................................................................................10-12 10.3.2 Timing and Synchronisation Performance .....................................................................................10-12

10.4 Transmission Performance ......................................................................................................................10-12 10.5 Power Supply Parameters........................................................................................................................10-13 10.6 Power Consumption and Weight of Boards.............................................................................................10-13 10.7 Electromagnetic Compatibility................................................................................................................10-15 10.8 Safety Management.................................................................................................................................10-16 10.9 Environment Indexes...............................................................................................................................10-16 10.10 Environment Requirement ....................................................................................................................10-17

10.10.1 Environment for Storage ..............................................................................................................10-17 10.10.2 Environment for Transportation...................................................................................................10-19 10.10.3 Environment for Operation ..........................................................................................................10-21

OptiX OSN 7500 Product Description Figures

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Figures

Figure 1-1 Outer view of the OptiX OSN 7500 .................................................................................................1-2

Figure 1-2 Application of the OptiX OSN 7500 in the network.........................................................................1-3

Figure 2-1 Access capacity of service slots when the T1GXCSA/T1EXCSA is used........................................2-4

Figure 2-2 Access capacity of service slots when the T2UXCSA/T1SXCSA is used........................................2-5

Figure 2-3 Remote optical amplifier system ....................................................................................................2-14

Figure 2-4 Application of REG ........................................................................................................................2-16

Figure 3-1 Hardware structure of the OptiX OSN 7500.....................................................................................3-2

Figure 3-2 Outer view of the ETSI cabinet ........................................................................................................3-4

Figure 3-3 Structure of the OptiX OSN 7500 subrack .......................................................................................3-5

Figure 3-4 Slot layout of the OptiX OSN 7500 subrack.....................................................................................3-6

Figure 3-5 System architecture...........................................................................................................................3-8

Figure 4-1 Software system structure.................................................................................................................4-2

Figure 4-2 Relationship between control plane and transmission plane.............................................................4-5

Figure 5-1 EPL services based on port ...............................................................................................................5-6

Figure 5-2 The EPL service based on port+VLAN ............................................................................................5-7

Figure 5-3 EVPL services with MPLS labels.....................................................................................................5-8

Figure 5-4 Layer 2 switching of Ethernet services.............................................................................................5-9

Figure 5-5 Application of EVPLAN service ....................................................................................................5-10

Figure 5-6 LCAS adjusts bandwidth dynamically............................................................................................5-11

Figure 5-7 LCAS protects the concatenation group .........................................................................................5-11

Figure 5-8 RPR ring .........................................................................................................................................5-13

Figure 5-9 Spatial reuse....................................................................................................................................5-16

Figure 5-10 Fairness algorithm when the weight is 1.......................................................................................5-17

Figure 5-11 Fairness algorithm when the weights are different .......................................................................5-17

Figure 5-12 EVPL accessing, forwarding and stripping...................................................................................5-18

Figure 5-13 EVPL service convergence ...........................................................................................................5-18

Figures OptiX OSN 7500

Product Description

viii Huawei Technologies Proprietary Issue 04 (2007-12-10)

Figure 5-14 EVPLAN service ..........................................................................................................................5-19

Figure 5-15 Wrapping protection .....................................................................................................................5-20

Figure 5-16 Steering protection........................................................................................................................5-21

Figure 5-17 teering protection ..........................................................................................................................5-22

Figure 5-18 Application of Band exclusive ATM Services ..............................................................................5-26

Figure 5-19 VP/VC-Ring .................................................................................................................................5-27

Figure 5-20 ATM service networking and port allocation................................................................................5-28

Figure 6-1 Control link auto-discovery ..............................................................................................................6-2

Figure 6-2 TE link auto-discovery......................................................................................................................6-3

Figure 6-3 End-to-end service configuration......................................................................................................6-4

Figure 6-4 Trail restoration.................................................................................................................................6-5

Figure 6-5 A diamond service.............................................................................................................................6-7

Figure 6-6 A gold service .................................................................................................................................6-10

Figure 6-7 A silver service................................................................................................................................6-11

Figure 6-8 Tunnel services ...............................................................................................................................6-14

Figure 6-9 Service Association.........................................................................................................................6-15

Figure 6-10 Traffic equilibrium........................................................................................................................6-16

Figure 6-11 LCAS (different path) ...................................................................................................................6-17

Figure 6-12 LCAS (same path) ........................................................................................................................6-17

Figure 7-1 End to end conversion of an unprotected trail to an SNCP-protected trail .....................................7-10

Figure 7-2 Principle of multipath protection ....................................................................................................7-11

Figure 7-3 SNCMP networking........................................................................................................................7-12

Figure 7-4 SNCMP service route in the case of single point failure ................................................................7-12

Figure 7-5 SNCMP service route in the case of multipoint failure ..................................................................7-13

Figure 7-6 DNI protection of two SNCP rings .................................................................................................7-14

Figure 7-7 Fibre-shared virtual path protection................................................................................................7-15

Figure 7-8 MS-shared optical path protection ..................................................................................................7-15

Figure 7-9 Two lower-speed lines share one higher-speed line ........................................................................7-16

Figure 7-10 Sharing protection of the lines the lin same speed.....................................................................7-16

Figure 7-11 Bidirectional RPR .........................................................................................................................7-17

Figure 7-12 Wrapping of RPR..........................................................................................................................7-17

Figure 7-13 Steering of RPR ............................................................................................................................7-18

Figure 7-14 VP-Ring/VC-Ring protection .......................................................................................................7-18

OptiX OSN 7500 Product Description Figures

Issue 04 (2007-12-10) Huawei Technologies Proprietary ix

Figure 8-1 Networking of clock with disabled SSM ..........................................................................................8-4

Figure 8-2 Clock mutual tracing caused by fibre break......................................................................................8-4

Figure 8-3 SSM application................................................................................................................................8-5

Figure 8-4 Clock mutual tracing occurs when enabling SSM ............................................................................8-5

Figure 8-5 Application of clock source ID .........................................................................................................8-6

Figure 8-6 Functional diagram of retiming ........................................................................................................8-6

Figure 8-7 An SDH network without retiming...................................................................................................8-7

Figure 8-8 An SDH network with retiming ........................................................................................................8-8

Figure 9-1 Network management interface ........................................................................................................9-3

Figure 9-2 NM information transmitted transparently by third party equipment ...............................................9-4

Figure 9-3 Transparent Transmission of NM Information of the Third Party Equipment ..................................9-4

Figure 9-4 NM information transmitted transparently by the third party equipment .........................................9-5


Figure 9-6 NM Information Transmitted Transparently by Third Party Equipment ..........................................9-6


OptiX OSN 7500 Product Description Tables

Issue 04 (2007-12-10) Huawei Technologies Proprietary xi

Tables

Table 2-1 Cross-Connect capacity ......................................................................................................................2-3

Table 2-2 Maximum service access capacity of the OptiX OSN 7500...............................................................2-7

Table 2-3 Service interfaces provided by the OptiX OSN 7500.........................................................................2-8

Table 2-4 Administration interfaces provided by the OptiX OSN 7500 .............................................................2-9

Table 2-5 Basic networking modes for the OptiX OSN 7500 ..........................................................................2-10

Table 2-6 Equipment level protection provided by the OptiX OSN 7500 ........................................................2-12

Table 2-7 Network level protections supported by the OptiX OSN 7500 ........................................................2-12

Table 2-8 Boards supporting REG....................................................................................................................2-16

Table 2-9 REG optical interfaces......................................................................................................................2-17

Table 3-1 Technical parameters of the ETSI cabinet ..........................................................................................3-3

Table 3-2 Technical parameters of the subrack...................................................................................................3-6

Table 3-3 Mapping relation of slots for interface boards and processing boards................................................3-7

Table 3-4 Paired slots .........................................................................................................................................3-7

Table 3-5 Boards and functions of each unit ......................................................................................................3-9

Table 3-6 Boards and their available slots ........................................................................................................3-11

Table 3-7 SDH processing boards and interface type .......................................................................................3-16

Table 3-8 PDH processing boards and their interface type...............................................................................3-17

Table 3-9 Data service processing boards and their interface type ...................................................................3-18

Table 3-10 DDN service processing boards and their interface type................................................................3-20

Table 3-11 WDM boards and their interface type.............................................................................................3-20

Table 3-12 Optical power amplifying unit and their interface type ..................................................................3-20

Table 3-13 Auxiliary units and their interface type...........................................................................................3-21

Table 5-1 Functions of the EFS4, EFS0 .............................................................................................................5-2

Table 5-2 Functions of the N1EGT2, N1EFT8 and N1EFT8A ..........................................................................5-3

Table 5-3 Functions of the N1EGS4, N1EMS4 and N2EGS2............................................................................5-4

Table 5-4 Functions of Ethernet boards supporting RPR .................................................................................5-14

Tables OptiX OSN 7500

Product Description

xii Huawei Technologies Proprietary Issue 04 (2007-12-10)

Table 5-5 RPR service class .............................................................................................................................5-15

Table 5-6 Functions of the ADL4, ADQ1 boards .............................................................................................5-23

Table 5-7 Functions of the N1IDL4, N1IDQ1 boards ......................................................................................5-24

Table 5-8 Supportable ATM service and traffic types of the OptiX OSN 7500................................................5-25

Table 5-9 Classification of ATM protection......................................................................................................5-28

Table 5-10 Functions of the N1MST4 board ....................................................................................................5-29

Table 5-11 Services and rates provided by the N1MST4..................................................................................5-30

Table 5-12 Function features of the N1DX1 and the N1DXA..........................................................................5-30

Table 6-1 Service level .......................................................................................................................................6-5

Table 6-2 TE links used by ASON services........................................................................................................6-6

Table 6-3 Attributes of the permanent 1+1 diamond services.............................................................................6-7

Table 6-4 Attributes of the rerouting 1+1 diamond services...............................................................................6-8

Table 6-5 Attributes of the non-rerouting diamond services...............................................................................6-9

Table 6-6 Attributes of gold services ................................................................................................................6-10

Table 6-7 Attributes of silver services ..............................................................................................................6-11

Table 6-8 Attributes of copper services ............................................................................................................6-12

Table 6-9 Attributes of iron services.................................................................................................................6-13

Table 6-10 Attributes of tunnel services ...........................................................................................................6-14

Table 6-11 Attributes of service association .....................................................................................................6-15

Table 6-12 Reverting service to original routes ................................................................................................6-18

Table 7-1 TPS protection types and supported boards........................................................................................7-2

Table 7-2 TPS protection parameters..................................................................................................................7-3

Table 7-3 1+1 protection parameters of the N1EMS4 board ..............................................................................7-3

Table 7-4 1+1 protection parameters of the ATM board.....................................................................................7-4

Table 7-5 1+1 protection parameters of the N1LWX board ...............................................................................7-4

Table 7-6 1+1 hot backup parameters of the cross-connect unit and the timing unit..........................................7-5

Table 7-7 1+1 hot backup parameters of the SCC unit .......................................................................................7-5

Table 7-8 Linear MSP parameters ......................................................................................................................7-7

Table 7-9 Maximum number of MSP rings supported by the OptiX OSN 7500 ................................................7-8

Table 7-10 MSP ring parameters ........................................................................................................................7-8

Table 7-11 SNCP parameters ............................................................................................................................7-10

Table 10-1 Optical interfaces of the OptiX OSN 7500.....................................................................................10-2

Table 10-2 Performances of the STM-1 optical interface of the OptiX OSN 7500..........................................10-2

OptiX OSN 7500 Product Description Tables

Issue 04 (2007-12-10) Huawei Technologies Proprietary xiii

Table 10-3 Performances of the STM-4 optical interface of the OptiX OSN 7500 STM-4 .............................10-3

Table 10-4 Performances of the STM-16 optical interface of the OptiX OSN 7500........................................10-3

Table 10-5 Performances of the STM-16 (FEC) optical interface of the OptiX OSN 7500 .............................10-4

Table 10-6 Performances of the STM-64 optical interface of the OptiX OSN 7500........................................10-5

Table 10-7 Performance of the STM-64 (FEC) optical interface of the OptiX OSN 7500...............................10-5

Table 10-8 Performance of the STM-16 and STM-64 fixed wavelength optical interface...............................10-6

Table 10-9 Nominal central wavelength and frequency of STM-16 and STM-64 optical interfaces ...............10-7

Table 10-10 Specifications of Ethernet optical interface of the OptiX OSN 7500 ...........................................10-8

Table 10-11 Specifications of ATM optical interface of the OptiX OSN 7500.................................................10-8

Table 10-12 LASER level of the Optical board................................................................................................10-9

Table 10-13 Performance of the PDH electrical interface ................................................................................10-9

Table 10-14 DDN interface performance .......................................................................................................10-10

Table 10-15 parameters of the 64 kbit/s interface...........................................................................................10-10

Table 10-16 Parameters of the RS-232 interface ............................................................................................10-11

Table 10-17 Parameters of the RS-232 interface ............................................................................................10-11

Table 10-18 Parameters of the orderwire audio interface ...............................................................................10-11

Table 10-19 Clock features of the OptiX OSN 7500 ......................................................................................10-12

Table 10-20 Timing and synchronisation performance of the OptiX OSN 7500............................................10-12

Table 10-21 Transmission performance of the OptiX OSN 7500...................................................................10-12

Table 10-22 Power supply parameters of the OptiX OSN 7500.....................................................................10-13

Table 10-23 Power consumption and weight of boards..................................................................................10-13

Table 10-24 EMC test specifications ..............................................................................................................10-15

Table 10-25 Safety authentications the OptiX OSN 7500 has passed ............................................................10-16

Table 10-26 Environmental indexes ...............................................................................................................10-16

Table 10-27 Climate environment for storage ................................................................................................10-17

Table 10-28 Density for mechanical active substances ..................................................................................10-18

Table 10-29 Density for chemical active substances ......................................................................................10-18

Table 10-30 Requirements for mechanical stress ...........................................................................................10-19

Table 10-31 Climate environment for transportation......................................................................................10-19


Table 10-33 Density for chemical active substance........................................................................................10-20


Table 10-35 Requirements for temperature and humidity ..............................................................................10-21

Tables OptiX OSN 7500

Product Description

xiv Huawei Technologies Proprietary Issue 04 (2007-12-10)

Table 10-36 Other climate requirements.........................................................................................................10-21


Table 10-38 Density for chemical active substances ......................................................................................10-22


OptiX OSN 7500 Product Description 1 Overview of the OptiX OSN 7500

Issue 04 (2007-12-10) Huawei Technologies Proprietary 1-1

1 Overview of the OptiX OSN 7500

This chapter describes the positioning and application of the OptiX OSN 7500 intelligent optical switching system (the OptiX OSN 7500 for short) in an optical transmission network.

The OptiX OSN 7500 is a piece of new generation equipment that Huawei has developed based on what the metropolitan area network (MAN) is like and its development trend in the future. As a piece of optical core switching (OCS) equipment, it is mainly used on the service grooming node at the backbone layer of the MAN as an intelligent optical switching platform. It features large switching capacity with a maximum of 240 Gbit/s higher order cross connection and 40 Gbit/s lower order cross connection.

In addition, the OptiX OSN 7500 provides intelligent features that are convenient and flexible to implement. The intelligent features help the OptiX OSN 7500 to realise dynamic switching, intelligent service routing and end-to-end service configuration, thus greatly improving bandwidth utilisation.

The OptiX OSN 7500 integrates the following technologies:

Synchronous digital hierarchy (SDH) Plesiochronous digital hierarchy (PDH) Wavelength division multiplexing (WDM) Ethernet Asynchronous transfer mode (ATM) Storage area network (SAN) Digital data network (DDN) Automatically switched optical network (ASON)

With the ASON features, the OptiX OSN 7500 enjoys the functions of intelligent route search of services and end-to-end configuration. Hence, the OptiX OSN 7500 equipment can be used with convenience and flexibility. The network bandwidth utilization is thus effectively improved.

Figure 1-1 shows the outer view of the OptiX OSN 7500.

1 Overview of the OptiX OSN 7500 OptiX OSN 7500

Product Description

1-2 Huawei Technologies Proprietary Issue 04 (2007-12-10)

Figure 1-1 Outer view of the OptiX OSN 7500

As an intelligent optical core switching system with large capacity, the OptiX OSN 7500 is mainly used at the backbone layer of the MAN to groom and transmit various services with different granules. It is used with the OptiX OSN 9500 and OptiX OSN 3500/2500/1500 to provide a complete MAN solution. Figure 1-2 shows how the OptiX OSN 7500 is applied in a transmission network.

OptiX OSN 7500 Product Description 1 Overview of the OptiX OSN 7500


Figure 1-2 Application of the OptiX OSN 7500 in the network

OptiX OSN 9500

Backbone layer

OptiX OSN 3500 OptiX OSN 7500

OptiX OSN 2500

OptiX OSN 1500

Convergence layer

Access layer

GSM/CDMA/WCDMA Ethernet SANPSTN ATM. . .

OptiX OSN 3500

OptiX OSN 2500

The OptiX OSN 7500 is used as:

The core convergence node of large cities The optical core switching (OCS) of medium and small cities The service grooming node on provincial trunks

OptiX OSN 7500 Product Description 2 Functions


2 Functions

About This Chapter

The following table lists the contents of this chapter.

Section Describes

2.1 Capacity This section describes the cross-connect capacity and the access capacity of the OptiX OSN 7500.

2.2 Service This section describes the service types supported by the OptiX OSN 7500.

2.3 Interface This section describes the interface types supported by the OptiX OSN 7500.

2.4 Networking This section describes the basic networking modes for OptiX OSN 7500.

2.5 Protection This section describes the protection types of the OptiX OSN 7500.

2.6 Clock This section describes the clock function of the OptiX OSN 7500.

2.7 Intelligent Features This section describes the intelligent features of the OptiX OSN 7500.

2.8 Built-in WDM Technology This section describes the build-in WDM technology of the OptiX OSN 7500.

2.9 Remote Pumping Amplifier System

This section describes the remote pumping amplifier system of the OptiX OSN 7500 in terms of function and structure.

2.10 Intelligent Power Adjustment

This section describes the intelligent power adjustment function of the OptiX OSN 7500.

2.11 External Clock Output Shutdown Function

This section describes the external clock output shutdown function of the OptiX OSN 7500.

2 Functions OptiX OSN 7500

Product Description


Section Describes

2.12 Resilient Packet Ring This section describes features of the resilient packet ring for the OptiX OSN 7500.

2.13 REG Function This section describes the REG function of the OptiX OSN 7500.

2.14 Board Version Replacement

This section describes the board version replacement function of the OptiX OSN 7500.

2.15 TCM This section describes the TCM concept.

2.16 E13 Function This section describes the E13 function of the OptiX OSN 7500.

2.17 Network Management Information Interworking

This section describes the classification of network management information interworking.



2.1 Capacity 2.1.1 Cross-Connect Capacity

The OptiX OSN 7500 provides four types of SDH cross-connect board: T1GXCSA , T1EXCSA, T2UXCSA and T1SXCSA. Table 2-1 lists their cross-connect capacities.

Table 2-1 Cross-Connect capacity

Board Higher-order cross-connect capacity

Lower-order cross-connect capacity

Access capacity

T1GXCSA 240 Gbit/s (1536 % 1536 VC-4)

20 Gbit/s (128 % 128 VC-4), equivalent to (8064 % 8064 VC-12) or (384 % 384 VC-3)

200 Gbit/s (1280 % 1280 VC-4)

T1EXCSAa 240 Gbit/s (1536 % 1536 VC-4)

40 Gbit/s (256 % 256 VC-4), equivalent to (16128 % 16128 VC-12) or (768 % 768 VC-3)

200 Gbit/s (1280 % 1280 VC-4)

T2UXCSA 360 Gbit/s (2304 % 2304 VC-4)

20 Gbit/s (128 % 128 VC-4) equivalent to (8064 % 8064 VC-12) or (384 % 384 VC-3)

280 Gbit/s (1792 % 1792 VC-4)

T1SXCSA 360 Gbit/s (2304 % 2304 VC-4)

40 Gbit/s (256 % 256 VC-4) equivalent to (16128 % 16128 VC-12) or (768 % 768 VC-3)

280 Gbit/s (1792 % 1792 VC-4)

a: The T1EXCSA cannot work with the line boards of N2 series (except for the N2SLQ16). The T2SL64 is out of delivery, which can be smoothly substituted by the T2SL64A. The T2SL64A is recommended to work with the T1EXCSA.

2.1.2 Slots Access Capacity The OptiX OSN 7500 provides 22 service slots. The maximum access capacity varies with the cross-connect and timing boards inserted. Figure 2-1 and Figure 2-2 show their access capacity.


Product Description


Figure 2-1 Access capacity of service slots when the T1GXCSA/T1EXCSA is used

SLOT1

SLOT2

SLOT3

SLOT4

SLOT5

SLOT6

SLOT7

SLOT8

SLOT9

SLOT10

SLOT11

SLOT12

SLOT13

SLOT14

SLOT15

SLOT16

SLOT18

XC

S(A

)

XC

S(B

)

FANA FANA FANA

SLOT17

Fiber routing Fiber routing

SLOT26

SLOT27

SLOT28

SLOT29

SLOT30

SLOT31

Fiber routing

SLOT25

SLOT24

GS

CC

(A)

GS

CC

(B)

SLOT19

SLOT20

SLOT21

SLOT22

SLOT23

AU

X

PIU

(A)

PIU

(B)

SLOT32

SLOT33

SLOT34

SLOT35

SLOT36

SLOT37

SLOT38

EO

W

5 G

bit/s

5 G

bit/s

5 G

bit/s

5 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

( A ) : primary ( B ): secondary



Figure 2-2 Access capacity of service slots when the T2UXCSA/T1SXCSA is used

SLOT1

SLOT2

SLOT3

SLOT4

SLOT5

SLOT6

SLOT7

SLOT8

SLOT9

SLOT10

SLOT11

SLOT12

SLOT13

SLOT14

SLOT15

SLOT16

SLOT18

XC

S(A

)

XC

S(B

)

FANA FANA FANA

SLOT17


SLOT26

SLOT27

SLOT28

SLOT29

SLOT30

SLOT31

Fiber routing

SLOT25

SLOT24

GS

CC

(A)

GS

CC

(B)

SLOT19

SLOT20

SLOT21

SLOT22

SLOT23

AU

X

PIU

(A)

PIU

(B)

SLOT32

SLOT33

SLOT34

SLOT35

SLOT36

SLOT37

SLOT38

EO

W

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

20 G

bit/s

20 G

bit/s

20 G

bit/s

20 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

20 G

bit/s

20 G

bit/s

( A ) : primary ( B ) : secondary

10 G

bit/s

10 G

bit/s

10 G

bit/s

10 G

bit/s

2.1.3 Integration Design The OptiX OSN 7500 is of a high integration.

A maximum of two OptiX OSN 7500 subracks can be installed in one ETSI cabinet that is 2.2 m high and 300 mm deep.

22 slots for processing boards and eight slots for interface boards are present on a single OptiX OSN 7500 subrack.

2.2 Service 2.2.1 SDH

The OptiX OSN 7500 can access SDH services, such as:

Standard SDH: STM-1/4/16/64 Standard SDH concatenated payload: VC-4-4c/16c/64c SDH with FEC: 10.709 Gbit/s, 2.666 Gbit/s


Product Description


2.2.2 PDH Service The OptiX OSN 7500 can access PDH services, such as:

E1/T1 E3/T3 E4

2.2.3 Ethernet Services The OptiX OSN 7500 provides FE and GE interfaces to process the following Ethernet services.

Ethernet Private Line (EPL) Ethernet Virtual Private Line (EVPL) Ethernet Private LAN (EPLAN) Ethernet Virtual Private LAN (EVPLAN)

2.2.4 Ethernet Ring Services The OptiX OSN 7500 provides FE and GE interfaces to process the following Ethernet ring services.

EPL services EVPL services EPLAN services EVPLAN services

2.2.5 ATM Services The OptiX OSN 7500 can process the following ATM services.

Constant bit rate (CBR) services rt-VBR (real-time variable bite rate) services nrt-VBR (non real-time variable bite rate) services Unspecified bit rate (UBR) services

2.2.6 DDN Services The OptiX OSN 7500 can process the following DDN services.

N%64 kbit/s (N = 1–31) services Frame E1 services

2.2.7 SAN and Video Services The OptiX OSN 7500 can process the following SAN services.

Fibre channel (FC) services Fibre connection (FICON) services Enterprise systems connection (ESCON) services Digital video broadcast –asynchronous serial interface (DVB-ASI) services



2.2.8 Service Access Capability The capacity of services that the OptiX OSN 7500 can access varies with the type and quantity of the configured boards. Table 2-2 lists the maximum capacity of the OptiX OSN 7500 for accessing different services.

Table 2-2 Maximum service access capacity of the OptiX OSN 7500

Service type Max. access ports of a single subrack

STM-64 standard or concatenated service 22


STM-64 (FEC) service 17

STM-16 (FEC) service 22


STM-1 standard service 280

STM-1 (electrical) service 66

E4 service 16

E3/T3 service 78

E1/T1 service 252

N%64kbit/s service 32

Frame E1 32

Fast Ethernet (FE) service 208

Gigabit Ethernet (GE) service 88

STM-1 ATM service 88

STM-4 ATM service 22

ESCON service 88

FICON/FC100 service 44

FC200 service 22

DVB-ASI service 88


Product Description


2.3 Interface 2.3.1 Service Interface

The OptiX OSN 7500 provides service interfaces. Table 2-3 lists the descriptions of these service interfaces.

Table 2-3 Service interfaces provided by the OptiX OSN 7500

Interface type Description

SDH STM-1 electrical interface: SMB connector STM-1 optical interfaces: I-1, S-1.1, L-1.1, L-1.2, Ve-1.2 STM-4 optical interfaces: I-4, S-4.1, L-4.1, L-4.2, Ve-4.2 STM-16 optical interfaces: I-16, S-16.1, L-16.1, L-16.2, L-16.2(Je), V-16.2(Je), U-16.2(Je) STM-16 optical interfaces (out-of-band FEC): Ue-16.2c, Ue-16.2d, Ue-16.2f STM-64 optical interfaces: I-64.2, S-64.2b, L-64.2b, Le-64.2, Ls-64.2, V-64.2b The STM-16 and STM-64 optical interfaces support fixed wavelength output compliant with ITU-T G.692: 192.1THz – 196.0THz

PDH 75/120 ohm E1 electrical interface: DB44 connector 100 ohm T1 electrical interface: DB44 connector 75 ohm E3, T3 and E4 electrical interfaces: SMB connector

Ethernet 10/100Base-TX, 100Base-FX, 1000Base-SX, 1000Base-LX, 1000Base-ZX

DDN Framed E1, V.35, V.24

ATM STM-1 optical interfaces: Ie-1, S-1.1, L-1.1, L-1.2 and Ve-1.2 STM-4 optical interfaces: S-4.1, L-4.1, L-4.2 and Ve-4.2 E3 interface: accessed by N1PD3/N1PL3/PL3A board IMA E1 interface: accessed by N1PQ1/N1PQM board

SAN FC100/FICON, FC200, ESCON service optical interfaces

Video DVB-ASI service optical interface

Note: Ue-16.2c, Ue-16.2d, Ue-16.2f, L-16.2(Je), V-16.2(Je), U-16.2(Je), Le-64.2, Ls-64.2, Ve-1.2 and Ve-4.2 are technical specifications defined by Huawei.

2.3.2 Administration Interface The OptiX OSN 7500 also provides administration interfaces. See Table 2-4 for the descriptions of these administration interfaces.



Table 2-4 Administration interfaces provided by the OptiX OSN 7500

Interface Description

Clock interface Two 75 ohm external clock interfaces (2048 kbit/s or 2048 kHz) Two 120 ohm external clock interfaces (2048 kbit/s or 2048 kHz)

Alarm interface Sixteen alarm input interfaces, four alarm output interfaces Concatenated input interface for alarm Four output interfaces for cabinet alarm indicator Four concatenated input interfaces for cabinet alarm indicator

Administration interface

One OAM interface for remote maintenance Four broadcast data interfaces (S1-S4) One 64 kbit/s codirectional data path interface (F1) One RJ45/100Base-T network management (NM) interface (ETH) One administration serial interface (F&f)

Orderwire interface

One orderwire phone interface (PHONE) Two SDH network node interface (NNI) voice interfaces (V1-V2) Two SDH network node interface (NNI) signaling interfaces (multiplexed with two data interfaces for transparent transmission of serial asynchronous data)

2.4 Networking The OptiX OSN 7500 is of the optical core switching (OCS) equipment type. It supports configuration and mixed configuration of various types of SDH NEs.

Terminal multiplexer Add/Drop multiplexer Multiple add/drop multiplexer

The OptiX OSN 7500 can be used as the equipment at the backbone layer or the aggregation layer. It can form a complete MAN when used with:

The OptiX OSN 9500 The OptiX OSN 3500 The OptiX OSN 2500 The OptiX OSN 2500 REG The OptiX OSN 1500 The OptiX Metro 1000 Other MSTP equipment developed by Huawei

The OptiX OSN 7500 can be used with other equipment for mixed networking at the same network layer. At the backbone layer, the OptiX OSN 7500 can be used with the OptiX 10G(Metro5000) for networking. At the aggregation layer, the OptiX OSN 7500 can be used with following equipment for networking.


Product Description


The OptiX OSN 3500 The OptiX OSN 2500 The OptiX 2500+(Metro3000) The OptiX OSN 2500 REG

The OptiX OSN 7500 supports the following complex network topologies at STM-1/STM-4/STM-16/STM-64 service levels.

Linear network Ring network Hub network Ring with chain network Tangent ring network Intersecting network Dual node interconnecting (DNI) network Mesh network

Table 2-5 Basic networking modes for the OptiX OSN 7500

Networking mode Topology map

1 Chain

2 Ring

3 Tangent rings

4 Intersecting rings



Networking mode Topology map

5 Ring with chain

6 DNI

7 Hub

8 Mesh

Legend: MADM ADM TM ASON NE

2.5 Protection 2.5.1 Equipment Level Protection

Table 2-6 provides the equipment level protection provided by the OptiX OSN 7500.


Product Description


Table 2-6 Equipment level protection provided by the OptiX OSN 7500

Item Protection scheme Revertive or Non-revertive

E1/T1 processing board 1:N (N≤4) tributary protection switching (TPS)

Revertive

E3/T3/E4/STM-1(e) processing board 1:N (N≤3) TPS Revertive

DDN 1:N (N≤4) TPS Revertive

Ethernet processing board (N2EFS0, N4EFS0)

1:1 TPS Revertive

Ethernet processing board (N1EMS4) 1+1 backup Non-revertive

Ethernet processing board (N1EGS4) 1+1 backup Non-revertive

ATM processing board 1+1 backup Non-revertive

Arbitrary bit rate wavelength conversion board N1LWX

Intra-board protection inter-board protection

Non-revertive

Cross-Connect & timing unit 1+1 backup Non-revertive

SCC unit 1+1 backup Non-revertive

–48 V power interface board 1+1 backup -

3.3 V power of boards 1:N backup -

Note: The OptiX OSN 7500 supports the coexistence of two different types of TPS protection groups.

2.5.2 Network Level Protection Table 2-7 lists the network level protections that the OptiX OSN 7500 supports.

Table 2-7 Network level protections supported by the OptiX OSN 7500

Network Level Protection Protection Scheme

Linear MSP

MSP ring

Sub-network connection protection (SNCP)

Sub-Network connection multi-path protection (SNCMP)

Inter-Ring interconnecting service protection

Fiber-Shared virtual trail protection

SDH protection

MS-Shared optical path protection

Ethernet protection Resilient packet ring (RPR) protection

ATM protection VP-Ring/VC-Ring protection



2.6 Clock The OptiX OSN 7500 supports the following clock functions.

SSM clock protocol Tributary retiming Two 75-ohm/120-ohm external clock output and input Line clock source Tributary clock source Three working modes

− Tracing mode − Hold-over mode − Free-run mode

2.7 Intelligent Features

The intelligent software system can be bundled with or separated from the OptiX OSN 7500 as required. If it is not equipped with the intelligent software system, the OptiX OSN 7500 does not support the intelligent features described in this document.

The OptiX OSN 7500 provides a set of stand-alone intelligent software system that is quite convenient and flexible to use for dynamic bandwidth allocation, intelligent service routing and configuration of services. The bandwidth utilisation is improved.

The intelligent features help the OptiX OSN 7500 to:

Support automatic end-to-end service configuration. Support service level agreement (SLA). Support mesh networking and protection. Provide traffic engineering control to guarantee load-balance traffic network wide and

improve the bandwidth availability. Provide distributed mesh network protection including real-time rerouting and

pre-configuration. Support span protection and end-to-end service protection, improving the scalability of the network.

2.8 Built-in WDM Technology The functions of the built-in WDM technology of the OptiX OSN 7500 are described below.

The N1MR2A or N1MR2C board adds/drops two adjacent standard wavelengths compliant with ITU-T G.692 (DWDM).

The operating wavelength ranges from 1535.82 nm to 1560.61 nm. The N1MR2A or N1MR2C board serves as an OTM station adding/dropping two

channels of signals. Two N1MR2A boards connected serially can form an OTM station adding/dropping four

channels.


Product Description


Two N1MR2C boards connected serially can form an OTM station adding/dropping four channels.

The N1MR2A or N1MR2C board can work with the N1LWX to form an OADM station adding/dropping two channels of signals.

The N1LWX board converts client-side signals into ITU-T G.692 (DWDM) compliant standard wavelength signals.

Two types of N1LWX boards are available: one is single-fed single receiving, and the other is dual-fed signal selection.

The dual-fed signal selection N1LWX board supports intra-board protection, realising optical channel protection with one board. The protection switching time is less than 50ms.

The single-fed single receiving N1LWX board supports inter-board protection, that is, 1+1 inter-board hot backup protection. The protection switching time is less than 50ms.

2.9 Remote Pumping Amplifier System The transmitting distance of optical signals is increased by using the optical pumping amplifier system in the OptiX OSN products.

The optical pumping amplifier system consists of BA optical amplifier board, ROP board and filter isolating board (FIB). Figure 2-3 shows the typical optical pumping amplifier system.

Figure 2-3 Remote optical amplifier system

BA17SF16G.652 fiber

ROPBASF16G.652

ErbiumG.652fiber

ROP FIB SF16SF16

2.10 Intelligent Power Adjustment The OptiX OSN 7500 provides the function of intelligent power adjustment (IPA). The IPA function is to shut down the pump laser when the receiving side of the line board detects no input of signals. Therefore, the damage to eyes by too much laser power is avoided.

In a transmission system, the optical signals in optical paths may be lost because of a fiber cut, equipment degrade or connector disconnection. To prevent the damage to human bodies, especially eyes, the system provides the IPA function. When the optical signals in the one or several optical trunk sections of the main optical path are lost, the system detects the signal loss and shuts down the uplink optical amplifier. Several seconds later, the laser of the downlink optical amplifier is also shut down. When the optical signals recover, the optical amplifier resumes working.



2.11 External Clock Output Shutdown Function The OptiX OSN 7500 provides the function of external clock output shutdown. Users can use the T2000 to issue a command to the cross-connect board to shut down or recover the two external T4 external clock outputs. Moreover, the current configuration status of the SCC can also be queried.

When the function is performed, no external clock signals are output. In addition, the software cannot automatically recover the clock output unless the T2000 issues a command to disable the function.

By default, the external clock output shutdown function is not enabled. In other words, external clock signals are output by default.

2.12 Resilient Packet Ring The resilient packet ring (RPR) is suitable for ring topology and is able to restore services from a broken fibre and link failure. The RPR performs the following functions:

Provides the topology automatic discovery function to reflect the network status in real time.

Supports fair algorithm by configurable weight and supporting five service levels. Supports a maximum of 255 nodes in the ring network and supporting stripping at the

destination node. Solves fairness and congestion control problems. Provides RPR protection

2.13 REG Function The OptiX OSN 7500 supports joint application of REG and ADM, as shown in Figure 2-4.


Product Description


Figure 2-4 Application of REG

REG

SL64

SL64

IN OUT

OUT IN

OUT

IN

SL64

IN

OUT

SL64

OptiX OSN 7500

OUT

IN

OUT

IN

SL16 SL16

IN

OUT

SL16

IN

OUT

SL16

ADM

For the boards that support REG, see Table 2-8. For optical interface types of these boards, see Table 2-9.

Table 2-8 Boards supporting REG

Board Slots Function

240 Gbit/s: slot 3 – 8, 11 – 16, 26 –31

T2SL64

360 Gbit/s: slot 1 – 8, 11 – 18, 26 – 31

N1SL64 Slot 4 – 8, 11 – 16, 26 – 31

240 Gbit/s: slot 3 – 8, 11 – 16, 26 – 31

N1SL16, N2SL16, N1SL16A, N2SL16A 360 Gbit/s: slot 1 – 8, 11 – 18,

26 – 31

With the REG mode enabled, the board only processes frame header and regeneration section overhead.

N1SF64 Slot 4 – 8, 11 – 16, 26 – 31

240 Gbit/s: slot 3 – 8, 11 – 16, 26 – 31

N1SF16

360 Gbit/s: slot 1 – 8, 11 – 18, 26 – 31

With the REG mode enabled, the board only processes frame header, regeneration section overhead and FEC overhead.



Table 2-9 REG optical interfaces

Board Optical interface type Board Optical interface type

T2SL64, N1SL64

I-64.2, S-64.2b, L-64.2b, Le-64.2, Ls-64.2, V-64.2b

N1SF64 Ue-64.2c, Ue-64.2d, Ue-64.2e

N1SL16, N2SL16

L-16.2, L-16.2(Je), V-16.2(Je), U-16.2(Je)

N1SF16 Ue-16.2c, Ue-16.2d, Ue-16.2f

N1SL16A, N2SL16A

I-16, S-16.1, L-16.1, L-16.2 - -

2.14 Board Version Replacement The board version replacement function replaces an old version board with a new version board. After the replacement, the configuration and service status of the new version board are consistent with those of the old version board.

This function provides a flexible board replacement scheme, and thus lowers the equipment cost and the maintenance cost.

Currently for OptiX OSN 7500, the board version replacement function is supported by the N1SL64, N2SLQ16, N2PQ1, N2EFS0, N4EFS0, N2EGS2 and N2EFS4 boards.

For detailed replacement relations of boards that support this function, refer to the OptiX OSN 7500 Troubleshooting.

When using the board version replacement function, note the following two points:

If an N2 version line board is used to replace an N1 version line board, AU-3 services and TCM function cannot be configured on the N2 version line board.

The line board to be replaced cannot have optical-path-shared MSP configured.

2.15 TCM Tandem connection monitor (TCM) is a method used to monitor bit errors. If a VC-4 passes through several networks, the bit errors of each section can be monitored through TCM.

The N2SL1, N2SLQ1, N2SLO1, N2SL4, N2SLD4, N2SLQ4, N2SL16, N2SL16A, N2SLQ16 and T2SL64A boards support TCM at the VC-4 level.

2.16 E13 Function The OptiX OSN 7500 supports the E13 function. The E13 function helps multiplex E1 (1) signals into E3 (16) signals or de-multiplex E3 signals to E1 signals. There are two modes for the E13 function: Transmux and Transmux Server.

The remote NE transmits the E1/E3 services in VC-12/VC-3 granularities to the central NE by the SDH line.


Product Description


The central NE disassembles the received services into E1 signals. − For E1 services, the central NE directly de-multiplexes VC-12 signals to E1 signals. − For E3 services, the central NE first de-multiplexes VC-3 signals into E3 signals. The

E13 function is then performed to de-multiplex E3 signals into E1 signals. The central NE first grooms E1 signals and then aggregates these E1 signals to form E3

signals by using the E13 function. The E3 signals are then output. − If the aggregated E3 signals are output to the local application equipment, the mode is

the Transmux mode. − If the aggregated E3 signals are output to other transmission equipment through the

SDH line, this mode is the Transmux Server mode.

2.17 Network Management Information Interworking When the network management information of the OptiX OSN 7500 is to be transparently transmitted by the third-party equipment or when the network management information of the third-party equipment is to be transmitted transparently by the OptiX OSN 7500, the following three schemes can be applied.

ECC over DCC IP over DCC OSI over DCC

OptiX OSN 7500 Product Description 3 Hardware


3 Hardware

About This Chapter


Section Describes

3.1 Hardware Structure This section describes the hardware structure of the OptiX OSN 7500.

3.2 Cabinet This section describes the parameters of the OptiX OSN 7500 cabinet.

3.3 Subrack This section describes the structure of the OptiX OSN 7500 subrack.

3.4 Boards This section describes the boards and the available slots of the OptiX OSN 7500.

3 Hardware OptiX OSN 7500

Product Description


3.1 Hardware Structure The OptiX OSN 7500 equipment consists of the cabinet, subrack and boards. Figure 3-1 shows the hardware structure of the OptiX OSN 7500.

Figure 3-1 Hardware structure of the OptiX OSN 7500

3

2

1

1. OptiX OSN 7500 subrack 2. Cabinet 3. Boards



3.2 Cabinet The cabinet that complies with the ETSI standards is used for the OptiX OSN 7500. A power supply box is on the top of the cabinet to access –48 V or –60 V power. Table 3-1 lists the technical parameters of the ETSI cabinet.

Table 3-2 provides the ETSI cabinet that is 300 mm deep.

Table 3-1 Technical parameters of the ETSI cabinet

Size (mm) Weight (kg) Number of configured subracks

600 (W) % 300 (D) % 2000 (H) 55 1

600 (W) % 600 (D) % 2000 (H) 79 1

600 (W) % 300 (D) % 2200 (H) 60 2

600 (W) % 600 (D) % 2200 (H) 84 2

600 (W) % 300 (D) % 2600 (H) 70 2

600 (W) % 600 (D) % 2600 (H) 94 2

NOTE All dimensions are in mm. The following figure shows the directions of the width, the depth and the height.

W

H

D


Product Description


Figure 3-2 Outer view of the ETSI cabinet

W

H

D



3.3 Subrack 3.3.1 Subrack Structure

The dual-layer subrack that complies with the ETSI standard is used for the OptiX OSN 7500. Figure 3-3 illustrates the structure of the OptiX OSN 7500 subrack.

Figure 3-3 Structure of the OptiX OSN 7500 subrack

Processing boardarea in upper tier

Interface board area

Fan area

Processing boardarea in lower tier

Fibre routing area

Fibre routing area

W

H

D

The front of the OptiX OSN 7500 subrack is separated into several areas.

Processing board area: for various OptiX OSN 7500 boards Interface board area: for various OptiX OSN 7500 interface boards Fan area: for three fan modules, providing heat dissipation function Fiber routing area: for fiber and cable routing

Table 3-2 lists the technical parameters of the OptiX OSN 7500 subrack.


Product Description


Table 3-2 Technical parameters of the subrack

Dimensions (mm) Weight (kg)

757 (H) % 497 (D) % 295 (W) 20

3.3.2 Slot Layout 20 slots are present at the upper layer of the OptiX OSN 7500 subrack and 18 slots are present at the lower layer of the OptiX OSN 7500 subrack. Figure 3-4 shows the slot layout.

Figure 3-4 Slot layout of the OptiX OSN 7500 subrack

SLOT1

SLOT2

SLOT3

SLOT4

SLOT5

SLOT6

SLOT7

SLOT8

SLOT9

SLOT10

SLOT11

SLOT12

SLOT13

SLOT14

SLOT15

SLOT16

SLOT18

XC

S(A

)

XCS

(B)

FANA FANA FANA

SLOT17


SLOT26

SLOT27

SLOT28

SLOT29

SLOT30

SLOT31

Fiber routing

SLOT25

SLOT24

SC

C(A

)S

CC

(B)

SLOT19

SLOT20

SLOT21

SLOT22

SLOT23

AU

X

PIU

(A)

PIU

(B)

SLOT32

SLOT33

SLOT34

SLOT35

SLOT36

SLOT37

SLOT38

EO

W

SLOT39 SLOT40 SLOT41

(A) indicates the board is the working board; while (B) indicates the protection board

Interface Board Area The slots for the interface boards of OptiX OSN 7500 are listed below.

Slots for service interface boards: slots 19–22 and slots 35–38 Slot for the orderwire board: slot 23 Slot for the auxiliary interface board: slot 34

Interface boards are used to provide physical interface for accessing optical or electrical signals and transmitting them to the corresponding processing board.



Processing Board Area The slots for the processing boards of the OptiX OSN 7500 are listed below.

Slots for service processing boards: slots 1–8, 11–18 and 26–31 Slots for cross-connect and clock boards: slots 9–10 Slots for power interface boards: slots 32–33 Slots for the system control and communication board: slots 24–25

Mapping Relation of Slots for Interface Boards and for Processing Boards Table 3-3 lists the mapping relation of slots for interface boards and for processing boards.

Table 3-3 Mapping relation of slots for interface boards and processing boards

Slots for Interface Boards Slots for Processing Boards

Slot 2 Slot 19,20

Slot 3 Slot 21,22

Slot 17 Slot 35,36

Slot 18 Slot 37,38

Paired Slots Table 3-4 lists the paired slots of the OptiX OSN 7500.

Table 3-4 Paired slots

Slot Paired Slot

Slot 1 Slot 18

Slot 2 Slot 17

Slot 3 Slot 16

Slot 4 Slot 15

Slot 5 Slot 14

Slot 6 Slot 13

Slot 7 Slot 12

Slot 8 Slot 11

Slot 26 Slot 27

Slot 28 Slot 29

Slot 30 Slot 31


Product Description


3.4 Boards 3.4.1 Type

The OptiX OSN 7500 consists of the following units.

SDH interface unit PDH interface unit Data service (Ethernet/ATM/SAN/Video) interface unit SDH cross-connect matrix unit (the core part) Synchronous timing unit SCC unit Overhead processing unit Power input unit and auxiliary interface unit

Figure 3-5 shows the system architecture of the OptiX OSN 7500. Table 3-5 provides the boards and functions of each unit. For details, see the OptiX OSN 7500 Intelligent Optical Switching System Hardware Description.

Figure 3-5 System architecture

Ethernet

ATM signal

SAN/Video

STM-Nopticalsignal

SDH interfaceunit

PDHinterface unit

Data serviceinterface unit

Overheadprocessing unit

synchronoustiming unit

Auxiliaryinterface unit

SCC

Interboardcommunication

and powerbackup unit

Power inputunit

PDHsignal

- 48V/ -60V DC

NM

Clock

Service bus Controlled bus Input/outputsignal

SDH cross-connectmatrix unit



Table 3-5 Boards and functions of each unit

Unit Constituent board Function

Processing board N1SL64, T2SL64, T2SL64A, N1SF16, N1SF64, N1SL16, N2SL16, N1SL16A, N2SL16A, N2SLQ16, N1SLQ4, N2SLQ4, N1SLD4, N2SLD4, N1SL4, N2SL4, N1SLH1, N1SLT1, N2SLO1, N1SLQ1, N2SLQ1, N1SL1, N2SL1, N1SEP1, N1SEP

Interface board N1EU08, N1OU08, N2OU08

SDH interface unit

Protection switching board

N1TSB8

Accesses and processes STM-1/STM-4/STM-16/STM-64 optical signals and VC-4-4c/VC-4-16c/VC-4-64c concatenated optical signals. Accesses and processes STM-16 optical signals with FEC. Accesses and processes STM-1 electrical signals, and conducts TPS protection for them.

Processing board N2SPQ4, N1PD3, N1PL3, N1PL3A, N1PQ1, N1PQM, N2PQ1

Interface board N1MU04, N1D34S, , N1C34S N1D75S, N1D12S, N1D12B

PDH interface unit


N1TSB8

Accesses and processes E1, E1/T1, E3/T3, E4/STM-1 electrical signals, and conducts TPS protection for them.

Processing board N1DX1, N1DXA N%64k service processing unit

Interface board N1DM12

Access and process N % 64 kbit/s (N=1–31) and Frame E1 signals. Provide system side cross-connection for N % 64 kbit/s signals and provide TPS protection for accessed signals.

Processing board N2EGS2, N1EGT2, N1EFT8, N1EFT8A, N2EFS0, N4EFS0, N1EFS4, N2EFS4, N1EMS4, N1EGS4

Interface board N1ETF8, N1EFF8

Ethernet interface unit


N1ETS8, N1TSB8

Accesses and processes 1000BASE-SX/LX/ZX, 100BASE-FX, 10/100BASE-TX Ethernet signals, and conducts TPS protection for them.

Processing board N2EMR0, N2EGR2 Resilient packet ring (RPR) unit Interface board N1ETF8, N1EFF8

Accesses and processes 1000BASE-SX/LX/ZX, 100BASE-FX, 10/100BASE-TX Ethernet signals. Supports RPR for Ethernet signals.

ATM interface unit N1ADL4, N1ADQ1, N1IDL4, N1IDQ1

Accesses and processes STM-4, STM-1 ATM signal. ID series boards provide IMA function.

GE, SAN and Video interface unit N1MST4 Accesses and processes FC/FICON, ESCON or DVB-ASI service.


Product Description


Unit Constituent board Function

N1MR2A, N1MR2C Provides add/drop multiplexing of any two adjacent wavelengths.

WDM unit

N1LWX Implements conversion between client signalling wavelengths of any rate (34 Mbit/s to 2.7 Gbit/s NRZ code signal) and those wavelengths complying with G.692 standard.

SDH cross-connect matrix unit

Synchronous timing unit

T1GXCSA, T1EXCSA, T2UXCSA, T1SXCSA

Implements cross connection between the SDH and PDH/data signals and provides the equipment with system clock.

SCC unit

Overhead processing unit

N2GSCC, N3GSCC Provides interface for connecting the equipment with the NM system and processes the overhead of SDH signals. Supports intelligent feature.

Power input unit T1PIU Provides power supply and protect the equipment against abnormal power.

T1AUX Implements centralised power backup function and provides auxiliary interfaces externally (F1, alarm and external clock).

Inter-board communication and power backup unit

T1EOW Implements communication between boards and provides auxiliary interfaces externally (orderwire, broadcast, external clock).

Fan unit N1FANA Dissipates heat for the system.

Optical booster amplifier board

BA2, BPA, ROP Amplifies or pre-amplify the optical power.

Case-shape optical amplifier

61COA, N1COA and 62COA Amplifies the optical power and is installed in the cabinet.

Other functional units

Dispersion compensation board

DCU Compensates for dispersion in STM-64 optical signals.

3.4.2 Boards and Available Slots Table 3-6 provides the OptiX OSN 7500 boards and their available slots.



Table 3-6 Boards and their available slots

Board Full name Slots available

240 Gbit/s cross-connect capacity: slots 3–8, 11–16, 26–31

T2SL64, T2SL64Aa

STM-64 optical interface board


N1SL64 STM-64 optical interface board

Slots 4–8, 11–16, 26–31

N1SF64 STM-64 (with FEC) optical interface board

Slots 4–8, 11–16, 26–31

N2SLQ16 4 % STM-4 optical interface board

Slots 1–8, 11–18, 26–31 240 Gbit/s cross-connect capacity: Two optical interfaces of the board in any of the slots 1–2, 17–18 are available Four optical interfaces of the board in any of slots 3–8, 11–16, 26–31 are available

360 Gbit/s cross-connect capacity: Four optical interfaces of the board in any of slots 1–8, 11–18, 26–31 are available


N1SL16, N2SL16, N1SL16A, N2SL16A

STM-16 optical interface board


240 Gbit/s cross-connect capacity: slots 3–8, 11–16, 26–31N1SF16 STM-16 (with FEC) optical interface board


N1SLH1 16 % STM-1 line processing board

Slots 2–3, 17–18

N1SLT1 12 % STM-1 optical interface board

Slots 1–8, 11–18, 26–31 240 Gbit/s cross-connect capacity: Twelve optical interfaces of the board in any of the slots 3–8, 11–16, 26–31 are available Eight optical interfaces of the board in any of the slots 1–2, 17–18

360 Gbit/s cross-connect capacity: Twelve optical interfaces of the board in any of slots 1–8, 11–18, 26–31 are available

N2SLO1 8 % AU-3 high density interface board

Slots 1–8, 11–18, 26–31


Product Description



N1SLQ4, N2SLQ4

4 % STM-4 optical interface board

Slots 1–8, 11–18, 26–31 240 Gbit/s cross-connect capacity: Two optical interfaces of the board in any of the slots 1–2, 17–18 are available Four optical interfaces of the board in any of slots 3–8, 11–16, 26–31 are available

360 Gbit/s cross-connect capacity: Four optical interfaces of the board in any of slots 1–8, 11–18, 26–31 are available

N1SLD4, N2SLD4


Slots 1–8, 11–18, 26–31

N1SL4, N2SL4 STM-4 optical interface board

Slots 1–8, 11–18, 26–31

N1SLQ1, N2SLQ1


Slots 1–8, 11–18, 26–31

N1SL1, N2SL1 STM-1 optical interface board

Slots 1–8, 11–18, 26–31

N1SEP1 2 % STM-1 line processing board

Slots 1–3, 17–18

N1SEP 8 % STM-1 line processing board

Slots 2–3, 17–18

N2SPQ4 4 % E4/STM-1 processing board

Slots 2–3, 17–18

N1PQM 63 % T1/E1 processing board Slots 1–3, 17–18

N1PD3 6 % E3/T3 processing board Slots 2–3, 17–18

N1PL3 3 % E3/T3 processing board Slots 2–3, 17–18

N1PL3A 3 % E3/T3 processing board Slots 1–8, 11–18, 26–31

N1PQ1 63 % E1 processing board Slots 1–3, 17–18

N2PQ1 63 % E1 processing board Slots 1–3, 17–18

N1EU08 8 % STM-1 electrical interface board

Slots 19–22, 35–38

N1OU08 8 % STM-1 optical interface board

Slots 19–22, 35–38

N2OU08 8 % STM-1 optical interface board

Slots 19–22, 35–38

N1TSB8 8 % PDH electrical interface switching & bridging board

Slots 37–38

N1MU04 4 % E4/STM-1 electrical interface board

Slots 19, 21, 35, 37




N1D75S 32 % 75Ω E1/T1 electrical interface switching board

Slots 19–22, 35–38

N1D12S 32 % 120Ω E1/T1 electrical interface switching board

Slots 19–22, 35–38

N1D12B 32 % E1/T1 electrical interface board

Slots 19–22, 35–38

N1C34S 3 % E3/T3 electrical interface board

Slots 19, 21, 35, 37

N1D34S 6 % E3/T3 electrical interface board

Slots 19, 21, 35, 37

N2EGS2 2-port Gigabit Ethernet interface board with Lanswitch

Slots 1–8, 11–18, 26–31

N1EGT2 2-port Gigabit Ethernet transparent transmission board

Slots 1–8, 11–18, 26–31

N2EFS0, N4EFS0

Fast Ethernet interface board with Lanswitch

Slots 2–3, 17–18

N1EFS4 4-port fast Ethernet interface board with Lanswitch

Slots 1–8, 11–18, 26–31

N1EFT8 b (An interface board is required)

16-port fast Ethernet transparent transmission board

Slots 2–3, 17–18

N1EFT8 b (No interface board is required)

8-port fast Ethernet transparent transmission board (no interface board)

Slots 1–3, 17–18

N2EMR0 (An interface board is required)

12 FE + 1 GE Ethernet ring network board

Slots 2–3, 17–18

N2EMR0 (No interface board is required)

4FE + 1 GE Ethernet ring network board (no interface board)

Slots 1–3, 17–18

N2EGR2 2-port Gigabit Ethernet ring network board

Slots 1–8, 11–18, 26–31

1.25Gbit/s: slots 1–2, 17–18 240 Gbit/s cross-connect capacity

2.5Gbit/s: slots 3

N1EMS4 (No interface board is required)

4 GE Ethernet transparent transmission and convergence board

360 Gbit/s cross-connect capacity

2.5Gbit/s : slots 1–3, 17–18


Product Description



1.25Gbit/s: slots 2, 17, 18 240 Gbit/s cross-connect capacity

2.5Gbit/s: slots 3

N1EMS4 (An interface board is required)

4 GE Ethernet transparent transmission and convergence board


2.5Gbit/s : slots 2–3, 17–18

1.25Gbit/s: slots 1–2, 17–18 240 Gbit/s cross-connect capacity

2.5Gbit/s: slots 3–8, 11–16, 26–31

N1EGS4 4 GE Ethernet transparent transmission and convergence board


2.5Gbit/s: slots 1–8, 11–18, 26–31

N1ETS8 8 % 10/100M Ethernet interface switching board

Slots 19, 21, 35, 37

N1ADL4 1 % STM-4 ATM service processing board

Slots 1–8, 11–18, 26–31

N1ADQ1 4 % STM-1 ATM service processing board

Slots 1–8, 11–18, 26–31

N1IDL4 1 % STM-4 ATM (IMA) service processing board

Slots 1–8, 11–18, 26–31

N1IDQ1 4 % STM-1 ATM (IMA) service processing board

Slots 1–8, 11–18, 26–31

N1MST4 4 % multi-service transparent transmission line board

Slots 1–8, 11–18, 26–31

N1DX1 DDN access, convergence and processing board

Slots 1–3, 17–18

N1DXA DDN convergence and processing board

Slots 1–8, 11–18, 26–31

N1DM12 N64K service accessing board

Slots 19–22, 35–38

N1ETF8 8 % 10/100M Ethernet twisted pair interface board

Slots 19–22, 35–38

N1EFF8 8 % 10/100M Ethernet twisted pair interface board

Slots 19–22, 35–38

N2GSCC General system control & communication board

Slots 24–25

N3GSCC General system control & communication board

Slots 24–25

T1GXCSAc Cross-connect timing board (240 Gbit/s, 20 Gbit/s)

Slots 9–10




T1EXCSAc Cross-connect timing board (240 Gbit/s, 40 Gbit/s)

Slots 9–10

T2UXCSA Cross-connect timing board (360 Gbit/s, 20 Gbit/s)

Slots 9–10

T1SXCSA Cross-connect timing board (360 Gbit/s, 40 Gbit/s)

Slots 9–10

T1AUX System auxiliary interface and orderwire processing unit

Slots 34

T1EOW Engineering orderwire unit Slots 23

T1PIU Power interface board Slots 32–33

N1FANA Full-speed FAN board Slots 39–41

COA Case erbium optical fiber amplifying unit

Slots 101–102

N1FIB Filter isolating board Slots 1–8, 11–18, 26–31

ROP Dispersion compensation board

Slots 103

N1LWX Arbitrary Bit Rate Wavelength Conversion Unit

Slots 1–8, 11–18, 26–31

N1BA2 Optical power amplifying board

Slots 1–8, 11–18, 26–31

N1BPA Board integrating optical power booster amplifier and pre-amplifier

Slots 1–8, 11–18, 26–31

N1DCU, N2DCU Dispersion compensation unit

Slots 1–8, 11–18, 26–31

N1MR2A Dual-path optical add/drop multiplexing board

Slots 1–8, 11–18, 26–31

a: To prevent high temperature of the board, insert the 10 Gbit/s SDH boards in slots in the lower layer of the subrack.

b: Four FE electrical interfaces are on the front panel of the N1EFT8 board. Used with one interface board, the N1EFT8 processes 16 % FE electrical signals or 8 % FE electrical signals and 8 % FE optical signals.

c: When the T1GXCSA or T1EXCSA is used, house the N1SLT1 in any of slots 1–2 and 17–18. In this case, only eight optical interfaces can be configured.

3.4.3 SDH Interface Unit Table 3-7 provides the SDH processing boards and their interface type.


Product Description


Table 3-7 SDH processing boards and interface type

Board Outlet mode Interface type Connector

T2SL64, T2SL64A

Led out from the front panel Supports fixed wavelength output and I-64.2, S-64.2b, L-64.2b, Le-64.2, Ls-64.2, V-64.2b

LC

N1SL64 Led out from the front panel Supports fixed wavelength output and I-64.2, S-64.2b, L-64.2b, Le-64.2, Ls-64.2, V-64.2b

LC

N1SF16 Led out from the front panel Supports fixed wavelength output and Ue-16.2c, Ue-16.2d, Ue-16.2f

LC

N1SL16, N2SL16

Led out from the front panel Supports fixed wavelength output and L-16.2, L-16.2(Je), V-16.2(Je) , U-16.2(Je)

LC

N1SL16A, N2SL16A

Led out from the front panel I-16, S-16.1, L-16.1, L-16.2 LC

N2SLQ16 Led out from the front panel Supports I-16, S-16.1, L-16.1, L-16.2

LC

N1SLQ4 Led out from the front panel I-4, S-4.1, L-4.1, L-4.2, Ve-4.2 LC


N1SLD4 Led out from the front panel I-4, S-4.1, L-4.1, L-4.2, Ve-4.2 LC

N2SLD4 Led out from the front panel I-4, S-4.1, L-4.1, L-4.2, Ve-4.2 LC

N1SL4 Led out from the front panel I-4, S-4.1, L-4.1, L-4.2, Ve-4.2 LC




Led out from the 8 % STM-1 optical interface board: N1OU08

I-1.1, S-1.1 electrical interface LC


I-1.1, S-1.1 electrical interface SC

Led out from the 8 % STM-1 electrical interface board: N1EU08

75Ω STM-1 electrical interface SMB

N1SLH1

Led out from the 8 electrical interface switching & bridging board: N1TSB8

- -

N2SLO1 Led out from the front panel I-1, S-1.1, L-1.1, L-1.2, Ve-1.2 LC

N1SLT1 Led out from the front panel S-1.1 LC






N1SEP1a Led out from the front panel 75 ohm STM-1 electrical interface SMB


I-1, S-1.1 optical interface LC


I-1, S-1.1 optical interface SC

Led out from the 8 % STM-1 electrical interface board: N1EU08

75Ω STM-1 electrical interface SMB

N1SEPa

Led out from the 8 electrical interface switching & bridging board: N1TSB8

- -

a: The N1SEP1 and N1SEP are the same physically. They are used with the interface board when they are configured as "N1SEP" on the T2000, or the signal is directly led out from the front panel when they are configured as "N1SEP1".

3.4.4 PDH Interface Unit Table 3-8 provides the PDH processing boards and interface type.

Table 3-8 PDH processing boards and their interface type


N2SPQ4 Led out from the electrical interface board: N1MU04

75 ohm E4/STM-1 electrical interface

SMB

Led out from the interface switching board: N1D34S

75 ohm E3/T3 electrical interface

SMB N1PD3

Led out from the 8 interface switching & bridging board: N1TSB8

- -

N1PL3 Led out from the interface board


SMB

Led out from the interface switching board: N1C34S


SMB N1PL3A

Led out from the 8 interface switching & bridging board: N1TSB8

- -


Product Description



N1PQ1A Led out from the interface board: N1D75S 75 ohm E1 interface

DB44

N1PQ1B Led out from the interface board: N1D12S

120 ohm E1 interface

DB44

N1PQM Led out from the interface board: N1D12S

120 ohm E1 interface and 100 ohm T1 interface

DB44

3.4.5 Data Service Interface Unit Table 3-9 provides the data service processing boards and their interface type.

Table 3-9 Data service processing boards and their interface type


Led out from the 8 % 10/100M Ethernet twisted pair interface board: N1ETF8

N2EFS0

Led out from the 8 % 10/100M Ethernet interface switching board: N1ETS8

10/100BASE-TX, 100Base-FX

RJ-45, LC


N4EFS0

Led out from the 8 % 10/100M Ethernet interface switching board: N1ETS8

10/100BASE-TX RJ-45

N1EFS4 Led out from the front panel 10/100BASE-TX RJ-45

N2EFS4 Led out from the front panel 10/100BASE-TX RJ-45

N1EGT2 Led out from the front panel 1000BASE-SX/LX/ZX LC

Led out from the front panel 10/100BASE-TX RJ-45



RJ-45,

N1EFT8a

Led out from the 8 % 10/100M Ethernet twisted pair interface board: N1EFF8


LC




N1EFT8A Led out from the front panel 10/100BASE-TX RJ-45

Led out from the front panel 10/100BASE-TX, 1000BASE-SX/LX/ZX

RJ-45, LC


10/100BASE-TX, 100Base-FX, 1000BASE-SX/LX/ZX

RJ-45

N2EMR0


10/100BASE-TX, 100Base-FX, 1000BASE-SX/LX/ZX

LC

N2EGR2 Led out from the front panel 1000BASE-SX/LX/ZX LC

Led out from the front panel 1000Base-SX/LX/ZX LC


10/100Base-TX, 100Base-FX, 1000Base-SX/LX/ZX

RJ-45

N1EMS4


10/100Base-TX, 100Base-FX, 1000Base-SX/LX/ZX

LC

N1EGS4 Led out from the front panel 1000Base-SX/LX/ZX LC

N1ADL4 Led out from the front panel S-4.1, L-4.1, L-4.2, Ve-4.2

LC

N1ADQ1 Led out from the front panel Ie-1, S-1.1, L-1.1, L-1.2, Ve-1.2

LC

N1IDL4 Led out from the front panel S-4.1, L-4.1, L-4.2, Ve-4.2

LC

N1IDQ1 Led out from the front panel Ie-1, S-1.1, L-1.1, L-1.2, Ve-1.2

LC

N1MST4 Led out from the front panel - LC

Note: Four FE electrical interfaces are on the front panel of the N1EFT8 board. Used with one interface board, the N1EFT8 processes 16 % FE electrical signals or 8 % FE electrical signals and 8 % FE optical signals.

3.4.6 DDN Service Processing Unit Table 3-10 lists DDN service processing boards and their interface type.


Product Description


Table 3-10 DDN service processing boards and their interface type

Board name Outlet mode Interface type Connector

N1DX1 Led out from the N64K service accessing board: N1DM12

V.24, RS449, RS530, RS530A, V.35, V.24, X.21 interfaces and Frame E1 interface

DB28, DB44

N1DXA - - -

3.4.7 WDM Unit Table 3-11 provides the WDM boards and their interface type.

Table 3-11 WDM boards and their interface type

Board name Outlet mode Connector

N1MR2A Led out from the front panel LC

N1MR2C Led out from the front panel LC

N1LWX Led out from the front panel LC

ROP Led out from the front panel LC

N1FIB Led out from the front panel LC, E2000

3.4.8 Optical Power Amplifying Unit Table 3-12 provides the optical power amplifying unit and their interface type.

Table 3-12 Optical power amplifying unit and their interface type


BA2 Led out from the front panel LC

BPA Led out from the front panel LC

61COA Led out from the front panel SC

N1COA Led out from the front panel SC

62COA Led out from the front panel SC, E2000

DCU Led out from the front panel LC

3.4.9 Auxiliary Unit Table 3-13 lists other function boards and their available slots.



Table 3-13 Auxiliary units and their interface type


T1PIU Led out from the front panel -

N1FANA Led out from the front panel -

T1AUX Led out from the front panel SMB, RJ-45

T1EOW Led out from the front panel SMB, RJ-45

OptiX OSN 7500 Product Description 4 Software


4 Software

About This Chapter


Section Describes

4.1 Overview This section describes the module structure of the software system for the OptiX OSN 7500.

4.2 Board Software This section describes the functions of the board software.

4.3 NE Software This section describes the functions of the NE software.

4.4 NM Software This section describes the functions of the NM software.

4.5 Intelligent Software This section describes the functions of the ASON software.

4 Software OptiX OSN 7500

Product Description


4.1 Overview The software system of the OptiX OSN 7500 is moduler. It consists of the following modules.

Board software, which runs on each board. NE software, which runs on the SCC board NM software, which runs on the NM computer ASON software, which is in the NE software and can run by itself

Figure 4-1 shows the software system structure.

Figure 4-1 Software system structure

NM software

Board Software

NE Software IntelligentSoftware

The ASON software can communicate with the NM software directly and with the board software through the NE software.

4.2 Board Software The board software runs on each board, managing, monitoring and controlling the operation of the board. It receives the command issued from the NE software and reports the board status to the NE software through performance and alarm events.

Its specific functions include alarm management, performance management, configuration management and communication management. It can directly control the functional circuits in corresponding boards and implement specific ITU-T compliant functions of the NE.

The board software can be classified into line software, tributary software, cross-connect software, clock software and orderwire software.



4.3 NE Software The NE software is used to manage, monitor and control the operation of the boards of an NE. The NM system uses the NE software, which is the communication unit between the NM system and boards, to control and manage NEs. According to ITU-T Recommendation M.3010, the NE software belongs to the unit management layer in the telecommunication management network, implementing the functions including NE functions, some of coordination functions and operating system functions of the network unit layer. The data communication function implements the communication between the NE and other equipment (including coordinated equipment, NM system, and other NEs).

Real-time multi-task operating system

The function of the real-time multi-task operating system of the OptiX OSN 7500 NE software is to manage public resources and provide support for the executive programme. It can provide an executive environment unrelated to processor hardware by segregating the application from the processor.

Network side (NS) module

The NS module is between the communication module and equipment management module. It converts the data format between the user operation side on the application layer and the NE equipment management layer, and provides security control for the NE layer. It can be functionally divided into three sub-modules Qx interface module, command line interface module and security management module.

Equipment administration module (AM)

The equipment AM is the kernel of the NE software for implementing NE management. It includes Manager and Agent. Administrator can send network management operation commands and receive events. Agent can respond to the network management operation commands sent by the network administrator, implement operations to the managed object and submit events according to status change of the managed object.

The equipment AM includes configuration management module, performance management module, alarm management module and MSP switching management module.

Communication module

This module fulfils the message communication function (MCF) of the functional blocks of the transmission network equipment.

Through the hardware interface provided by the SCC board, the communication module transmits the OAM&P information and exchanges management information between the NM system and NEs, and between NEs themselves. It consists of network communication module, serial communication module and ECC communication module.

Database management module

This module is an integral component of the NE software, and is composed of a database and a management system. The database comprises several sub databases, including network database, alarm database, performance database and equipment database. The management system manages and accesses the data in the database.

4 Software OptiX OSN 7500

Product Description


4.4 NM Software The NM system implements a unified management over the optical transmission network, and maintains all ION, SDH, Metro, DWDM NE equipment in the network. In compliance with ITU-T Recommendation, it is a network management system that integrates the standard management information model and object-oriented management technology. It exchanges information with NE software by using the communication module to implement monitoring and management over the network equipment.

The NM system applies the Qx interface to manage OptiX series equipment. The Qx interface applies Huawei OptiX exclusive management protocol.

The NM software runs on a workstation or PC, managing the equipment and the transmission network. It enables the user to operate, maintain and manage the transmission equipment. The management functions of the NM software include:

Alarm management: Collect, prompt, filter, browse, acknowledge, check, clear, and statistics in real time; fulfils alarm insertion, alarm correlation analysis and fault diagnosis.

Performance management: Set performance monitoring; browse, analyse and print performance data; forecast medium-term and long-term performance; and reset performance register.

Configuration management: Configure and manage interfaces, clocks, services, trails, subnets and time.

Security management: NM user management, NE user management, NE login management, NE login lockout, NE setting lockout and local craft terminal (LCT) access control of the equipment.

Maintenance management: Provide loopback, board resetting, automatic laser shutdown (ALS) and optical fibre power detection, and collect equipment data to help the maintenance personnel in troubleshooting

4.5 Intelligent Software The intelligent software is represented in a control plane which is layered on top of the transmission plane. The control plane interacts with the transmission plane to realise auto-configuration of service and provide service protection based on user levels. Figure 4-2 shows the relationship between the intelligent control plane and transmission plane.



Figure 4-2 Relationship between control plane and transmission plane

Service routealgorithm

Control plane

Transmissionplane

Interface adaptation

SignallingProtection and

restoration

Configurationmodule

Performancemodule

Securitymodule

Alarmmodule

Resource agent(slave)

Resource agent(master)

The transmission plane manages service configuration of the OptiX OSN 7500 and provides SDH-based protection for services. The control plane serves as one client of the transmission plane. The resource agents of the control plane and the transmission plane interact with each other by using the interface adaptation mechanism to obtain the status of resource allocation and to implement the function of provisioning of the NE.

OptiX OSN 7500 Product Description 5 Data Features


5 Data Features

About This Chapter


Section Describes

5.1 Ethernet Features This section describes the Ethernet features of the OptiX OSN 7500.

5.2 RPR Features This section describes the RPR features of the OptiX OSN 7500.

5.3 ATM Features This section describes the ATM features of the OptiX OSN 7500.

5.4 SAN Features This section describes the SAN features of the OptiX OSN 7500.

5.5 DDN Feature This section describes the DDN features of the OptiX OSN 7500.

5 Data Features OptiX OSN 7500

Product Description


5.1 Ethernet Features This section describes the Ethernet features of the OptiX OSN 7500 in terms of function, application and protection.

5.1.1 Function The OptiX OSN 7500 provides the Ethernet boards N1EFS4, N2EFS4, N2EFS0, N4EFS0, N2EGS2, N1EGT2, N1EMS4, N1EGS4, N1EFT8 and N1EFT8A to meet different Ethernet service requirements. Table 5-1 and Table 5-2 list the Ethernet boards with switching function. Table 5-3 lists the Ethernet boards with the function to transparently transmit services.

Table 5-1 Functions of the EFS4, EFS0

Function N1EFS4 N2EFS4 N2EFS0 N4EFS0

Interface 4 FE 4 FE 8 FE 8 FE

Interface type 10Base-T 100Base-TX

10Base-T, 100Base-TX

10Base-T, 100Base-TX, 100Base-FX


Used with interface board

None None N1ETS8 (cooperating with TSB8 to realize 1:1 TPS), N1ETF8, N1EFF8

N1ETS8 (cooperating with TSB8 to realize 1:1 TPS), N1ETF8, N1EFF8

Service frame format

Ethernet II, IEEE 802.3, IEEE 802.1 q/p

JUMBO frame Supported, 9600 bytes

Maximum uplink bandwidth

4 VC-4 8VC-4 8 VC-4 8 VC-4

Mapping granule VC-12, VC-3, VC-12-xv (x≤63), VC-3-xv (x≤12)

VC-12, VC-3, VC-12-xv (x≤63), VC-3-xv (x≤12)

VC-12, VC-3, VC-12-xv (x≤63), VC-3-xv (x≤12)

VC-12, VC-3, VC-12-xv (x≤63), VC-3-xv (x≤12)

Number of VCTRUNKs

12 24 24 24

Ethernet private line (EPL)

Supported

Ethernet virtual private line (EVPL)

Supported

Ethernet private LAN (EPLAN)

Supported

Ethernet virtual private LAN (EVPLAN)

Supported



Function N1EFS4 N2EFS4 N2EFS0 N4EFS0

Static MPLS label Support MartinioE label

Stack VLAN Supported

VLAN IEEE 802.1q/p

Rapid spanning tree protocol (RSTP)

Supported

Multicast (IGMP Snooping)

Supported

Encapsulation Generic framing procedure (GFP-F), compliant with ITU-T G.7041

link state pass through (LPT)

Supported

Link capacity adjustment scheme(LCAS)

Compliant with ITU-T G.7042

CAR Based on port or port + VLAN with the granularity of 64 kbit/s

Based on port, port + VLAN, or port + VLAN + Priority with the granularity of 64 kbit/s

Intra-board port aggregation

Not supported Supported Supported Supported

Flow control Supported, compliant with IEEE802.3X

Test frame Supported

Ethernet performance monitoring

Supported

RMON Supported

Table 5-2 Functions of the N1EGT2, N1EFT8 and N1EFT8A

Function N1EGT2 N1EFT8 N1EFT8A

Interface 2 % GE 16 % FE 8 % FE

Interface type 1000Base-SX, 1000Base-LX, 1000Base-ZX


10Base-T, 100Base-TX


None Supports 8 % FE if not used with the interface board. Supports 16 % FE if used with interface boards N1EFT8 and N1EFF8.

None


Product Description


Function N1EGT2 N1EFT8 N1EFT8A

Service frame format

Ethernet II, IEEE 802.3, IEEE 802.1QTAG

JUMBO frame Supported, 9600 bytes The latter four ports support JUMBO frame, 9600 bytes

Uplink bandwidth 16 VC-4 8 VC-4 4 VC-4

Mapping mode VC-3, VC-4, VC-3-xv (x≤24),VC-4-xv (x≤8)

VC-12, VC-3, VC-12-xv (x≤63),VC-3-xv (x≤3)

Number of VCTRUNKs

2 16 8

EPL Supported

EVPL Not supported

EPLAN Not supported

EVPLAN Not supported

Static MPLS label Not supported

VLAN Transparent transmission

Encapsulation format

GFP, LAPS, HDLC

LPT Not supported

LCAS ITU-T G.7042

CAR Not supported

Flow control IEEE 802.3X

Ethernet performance monitoring

Supported


Table 5-3 Functions of the N1EGS4, N1EMS4 and N2EGS2

Function N1EGS4 N1EMS4 N2EGS2

Interface 4 GE 4 GE and 16 FE 2 GE

Interface type 1000Base-SX,1000Base-LX, 1000Base-ZX

1000Base-SX, 1000Base-LX, 1000Base-ZX, 10Base-T, 100Base-TX, 100Base-FX

1000Base-SX, 1000Base-LX, 1000Base-ZX





None Supports 4 % GE if not used with the interface board. Supports 16 % FE and 4 % GE if used with interface boards N1EFT8 and N1EFF8.

None

Service frame format Ethernet II, IEEE 802.3, IEEE 802.1q/p Ethernet II, IEEE 802.3, IEEE 802.1 q/p

JUMBO frame Supported, 9216 bytes Supported, 9600 bytes

Uplink bandwidth 16 VC-4

Mapping mode VC-12, VC-3, VC-4, VC-12-xv (x≤63), VC-3-xv (x≤24), VC-4-xv (x≤8)

VC-12, VC-3, VC-12-xv (x≤63), VC-3-xv (x≤12)

Number of VCTRUNKs

64 48

EPL Supported

EVPL Supports EVPL based on VLAN and QinQ. Supported

EPLAN Supported

EVPLAN Not supported Supported

Static MPLS label Not supported Supports MartinioE label

VLAN Supports VLAN and QinQ. Supports the adding, deletion and exchange of VLAN labels, compliant with IEEE 802.1q/p.

Supports IEEE 802.1q/p

RSTP Supported

Multicast (IGMP Snooping)

Supported

Encapsulation format

GFP-F, LAPS, HDLC GFP

LPT Supported

LCAS ITU-T G.7042

CAR Port based or port + VLAN based, with granularity of 64 kbit/s

Port based, port + VLAN based, or port + VLAN + Priority with the granularity of 64 kbit/s

QoS traffic classification

Port based or Port + VLAN based Port based, port + VLAN based, or port + VLAN + Priority

Shaping Supported

CoS Supported


Product Description



Flow control Supported on basis of GE/FE port and in compliance with IEEE 802.3X.

Supported, compliant with IEEE802.3X

Ethernet OAM Supported


Link aggregation Manual link aggregation and static link aggregation are supported.

-

5.1.2 Application The OptiX OSN 7500 integrates the access of Ethernet services on the SDH transmission platform, so it can transmit both the voice service and data service.

EPL Service EPL service based on port

EPL implements the point-to-point transparent transmission of Ethernet services. As shown in Figure 5-1, the Ethernet services of different NEs are transmitted to the destination node through their respective VCTRUNKs. The Ethernet service is provided with a perfect SDH self-healing ring (SHR) protection scheme, and its reliable transmission is thus guaranteed.

Figure 5-1 EPL services based on port

SHR

1

3

4

5

Traffic flown

NE 4

NE 1

NE 2

NE 3

2

EPL service based on port +VLAN

EPL services are isolated through VLAN tags during bandwidth sharing.

As shown in Figure 5-2, flow classification is performed for the Ethernet service according to the port and VLAN ID to distinguish different VLANs of Company A and B. Up to two priorities can be set according to the flow classification result.



For security purpose, the OptiX OSN 7500 isolates services of different users by VLAN. In the figure below, VLAN 1 of Company A shares a VCTRUNK with VLAN 11 of Company B, VLAN 2 of Company A shares a VCTRUNK with VLAN 12 of Company B, and VLAN 3 of Company A shares a VCTRUNK with VLAN 13 of Company B.

All services of Company A are converged to NE1 and are outputed from the FE/GE interface of the NE1, and then are sent to the Lanswitch for further processing.

Figure 5-2 The EPL service based on port+VLAN

VLAN 1

VLAN 2

VLAN 13

VLAN 1

VLAN 2VLAN 3

Headquarters ofCompany B

Branch

Branch

Branch

VLAN 12

VLAN 3

VLAN 11 VLAN 12

VLAN 13

Headquartersof Company A

VLAN 11

1 3

2

Traffic flown

SHR

NE 1

NE 2

NE 3

NE 4

EVPL Service The OptiX OSN 7500 adopts the Martini modes to construct the multi-protocol label switching (MPLS) Layer 2 VPN and provide EVPL services.

The EVPL service offers point-to-point connection and implements service convergence for users. As shown in Figure 5-3, the system will search the Port + VLAN ID table for the external label (Tunnel) and internal label (VC), and add them to the accessed Ethernet frames. Data transfer in the network is based on the MPLS label, which switched at the label switch path (LSP). Then, the data will be transmitted to the NE4 equipment, which strips the MPLS label and transfers the data to the corresponding port.

The OptiX OSN 7500 integrates the function of P equipment and PE equipment.


Product Description


Figure 5-3 EVPL services with MPLS labels

L2 MPLS networkcomposed by OptiX

OSN Product

Company A

PE1 PE2P PPortA

TunnelLable VC Label DataCompany

60 10 ...A70 20

...B

... ... ......

TunnelPortB

PortA

PortB

60 1070 20 Data

Data 60 1070 20 Data

Data

Tunnel Tunnel VC labeladding/strippingTunnel VC label

adding/stripping

Company A

Company B

EPLAN Service The OptiX OSN 7500 supports Layer 2 switching of Ethernet data, that is, the EPLAN service, which can be transferred according to their destination media access control (MAC) addresses.

As shown in Figure 5-4, respective LANs of Company A and B are connected to four NEs. The Ethernet service between the NEs is not of a fixed point-to-point type. For example, a user of Company A connecting to NE3 may want to communicate with users of Company A connecting to other three NEs. That is, the flow direction of services is not definite. The Ethernet Layer 2 switching function provided by the OptiX OSN 7500 can be employed to solve such a problem. For example, an Ethernet MAC address transfer table will be formed in the system when the relevant settings are made to NE3. The system can learn to periodically update the table. Then, the data of Company A and B accessed at NE3 will be transmitted to their destinations over different VCTRUNKs selected according to their MAC transfer table or over the same VCTRUNK.

In this way, the system configuration is significantly simplified and the bandwidth utility is improved. In addition, the corresponding maintenance and management becomes convenient for the operator.



Figure 5-4 Layer 2 switching of Ethernet services

Company A Company B

NE1

Company A

Company B

Company ACompany B

Company A

Company B

MAC Address VC-TrunkMAC 1 NE1 ①MAC 2 NE4 ②MAC 3 NE2 ③

… … …

NE2

NE3

NE41

23

SHR

n Traffic flow

EVPLAN Service The OptiX OSN 7500 adopts the Martini MPLS Layer 2 VPN encapsulation format to support the Ethernet virtual private LAN (EVPLAN) services.

EVPLAN services implement the multipoint-to-multipoint connection of user sites. Users regard the EVPLAN network as a big VLAN where the user service can be converged. As shown in Figure 5-5, when the user’s Ethernet frame (the source address is MAC H, and the destination address is MAC A, B or C) enters the PE equipment, the system will search the Layer 2 transfer table for the internal label (VC label). Then, the frame is transferred to the corresponding tunnel, where it is attached with the external label (tunnel label). Thus, different LSPs are set up according to different addresses. The MPLS labels are switched at the LSP, and then transferred to the corresponding PE equipment, where the tunnel and VC labels are striped. After that, the Ethernet frame is transferred to the corresponding output port according to the Layer 2 MAC transfer table.


Product Description


Figure 5-5 Application of EVPLAN service

Branch CP

Branch A

Headquarters

Branch B

PE

PE

PE

Address =MAC C

Address =MAC A

Address =MAC B

Address =MAC HSink VC LabelTunnel Label

MAC A 101MAC B 202MAC C 303

Source

MAC H

MAC H

MAC H

LSP

LSP1LSP2LSP3

MPLSCore

LSP1 LSP2

LSP3

P PE

Transferd tocorrespondingport via the Layer2 route table

5.1.3 Protection The Ethernet service of the OptiX OSN equipment takes the protection of several levels, including:

Protection of LCAS STP/RSTP TPS BPS PPS LAG Protection of optical transmission layer, such as MSP and SNCP LPT

LCAS LCAS provides an error tolerance mechanism, enhancing the reliability of concatenation. It has the following functions:

Configures the system capacity, add or reduce the number of VC involved in the concatenation and change the service bandwidth dynamically without damaging the service.

Protects and recovers failed members.

As shown in Figure 5-6, LCAS can add or delete members to increase or decrease the bandwidth dynamically without affecting the service.



Figure 5-6 LCAS adjusts bandwidth dynamically

I want another 10 Mbandwidth. Member

Member Headquarters

Branch

BranchNew member

MSTP network

MSTP

Headquarters

Member

Member

As shown in Figure 5-7, LCAS protects the Ethernet service. The member is deleted automatically when the member fails. Other members continue transmitting data normally. The failed member is recovered automatically when available again and the data is loaded.

Figure 5-7 LCAS protects the concatenation group

Member

Member HeadquartersBranch

Failed member

Member

Member HeadquartersBranch

Delete failed member

MSTP network

MSTP


Product Description


STP/RSTP The Ethernet boards support spanning tree protocol (STP) and rapid spanning tree protocol (RSTP). The RSTP protects the link by restructuring the topology. When the RSTP is started, it can modify the logic network topology to avoid broadcast storms.

TPS The OptiX OSN 7500 supports one 1:1 TPS protection groups for the N2EFS0 or N4EFS0.

BPS BPS is a board level protection scheme, which applies an active board and an backup board. When the active board detects link down of any port or any faulty board hardware, the cross-connect board switches all services on the active board to the backup board. Services then are protected.

Both the N1EGS4 and the N1EMS4 boards support BPS protection.

PPS PPS is a protection scheme based on inter-board ports. This protection scheme also applies an active board and a backup board. When the active board detects link down of any port or any board hardware fault, the cross-connect board switches services of one or more ports affected to the backup board. In this way, the entire board needs not be switched.

Compared with BPS, the PPS protection scheme decreases the effect to the external system and the network.

Both the N1EGS4 and the N1EMS4 boards support PPS protection.

LAG Link aggregation group (LAG) means that several links connected to the same equipment are bundled together to increase bandwidth and to enhance the link reliability. The aggregated links can be taken as one link. The LAG enjoys the following functions.

Raise usability of links

In a link aggregation group, each member links act as dynamic backup for each other. Once one link fails, other link takes over immediately.

Increase link bandwidth

LAG provides uses with economical method to improve link transmitting rate. By bundling several physical links, users then need not upgrade the equipment to obtain data links with larger bandwidth. The bandwidth of bundled links equals that the sum of that for each link.

Carry traffic together Improve reliability

Each link in the LAG acts as dynamic backup for each other.

The aggregation modes fall into:

Dynamic aggregation Manual aggregation



Static aggregation

The N1EMS4, N1EGS4, N2EFS4, N2EFS0 and N4EFS0 boards support link aggregation. Currently, only manual aggregation is supported.

MSP and SNCP Ethernet service is protected by MSP or SNCP in optical transmission layer.

LPT LPT function is on basis of link protection. When the active ports and the standby ports between routers in network belong to different links, protection can be thus realized through LPT function. When the active link goes faulty, the local ports are shut down and the router of the opposite end detects the link abnormality. The traffic is switched from the active port to the backup one and is thus protected.

5.2 RPR Features This section describes the RPR features of the OptiX OSN 7500 in terms of function, application and protection.

The N2EMR0 and N2EGR2 boards of the OptiX OSN 7500 support resilient packet ring (RPR) features defined by IEEE 802.17. RPR employs a dual-ring structure utilising a pair of unidirectional counter-rotating rings, as shown in Figure 5-8. Both the outer ring and the inner ring bear data packets and control packets, featuring high bandwidth utilisation. The control packets on the inner ring carry control information for the data packets on the outer ring, and the control packets on the outer ring carry control information for the data packets on the inner ring. The two rings act as backup and protect for each other.

Figure 5-8 RPR ring

Node 1

Outer ring control

Node 2

Node 3

Node 42.5 Gbit/s RPR

Outer ring data

Inner ring data

Inner ring control


Product Description


5.2.1 Function

Basic Functions The N2EMR0 and N2EGR2 boards of the OptiX OSN 7500 support the resilient packet ring defined by the IEEE 802.17 standard. Table 5-4 lists their functions.

Table 5-4 Functions of Ethernet boards supporting RPR

Function N2EMR0 N2EGR2

Port number 1 GE+12 FE 2 GE

Service frame format Ethernet II, IEEE 802.3, IEEE 802.1QTAG

JUMBO frame Supported, 9600 bytes

Maximum uplink bandwidth 16 VC-4 (2.5 Gbit/s)

Mapping VC-3, VC-3-2v, VC-4, VC-4-xv (x≤8)

Ethernet virtual private line (EVPL)

Supported Supported

Ethernet virtual private LAN (EVPLAN)

Supported Supported

Static MPLS label Supports MartinioE label

stack VLAN Supported

VLAN Supports 4096 VLAN labels, as well as the adding, deletion and exchange of VLAN labels, compliant with IEEE 802.1q/p.

Spanning tree Supports RSTP.

Multicast (IGMP Snooping) Supported

RPR protection Steering, Wrapping, Wrapping + Steering The switching time is less than 50ms.

Encapsulation The GFP-F as stated in ITU-T G.7041 is supported. LAPS, compliant with ITU-T X.86.

LCAS Supports LCAS and complies with ITU-T 7042.

CAR Supports CAR based on port, port + VLAN, or port + VLAN + Priority with the granularity of 64 kbit/s.

QoS traffic classification N1EMR0 supports PORT, PORT+VLAN ID, PORT+VLAN PRI based traffic classification. N2EM40 and N2EGR2 support PORT, PORT+VLAN ID, PORT+VLAN ID+VLAN PRI, MPLS_label based traffic classification.

Flow control Supports flow control and complies with IEEE802.3X.

Port aggregation (within the board)

Supports port aggregation and complies with IEEE802.3ad.



Function N2EMR0 N2EGR2

Weighted fairness algorithm Supported

Topology discovery Supported

Maximum node number 255

Service class A0, A1, B_CIR, B_EIR and C

Service Class The user service has three classes, A, B and C. On the RPR ring, class A falls into A0 and A1. Class B falls into B_CIR (Committed Information Rate) and B_EIR (Excess Information Rate). Table 5-5 gives the difference of these classes.

Table 5-5 RPR service class

Class Sub-class Bandwidth Jitter Fair algorithm

Application

A0 Allocated, irreclaimable

Low Irrelevant Real time A

A1 Allocated, reclaimable

Low Irrelevant Real time

B_CIR Allocated, reclaimable

medium Irrelevant Near real timeB

B_EIR Opportunistic High Relevant Near real time

C C Opportunistic High Relevant Best effort

Topology Discovery The topology discovery function realizes the plug and play feature, for the function provides reliable method to discover the network nodes and their variation. In this case, the nodes of an RPR can be automatically added, deleted or switched.

To increase or decrease the total bandwidth of an RPR, use the LCAS function. The LCAS features adding and reducing bandwidth dynamically without affecting existing services.

Spatial Reuse The stripping of unicast frames at the destination station realises spatial reuse on an RPR. As shown in Figure 5-9, the bandwidth of a ring is 1.25 Gbit/s. Traffic 1 transferred from node 1 to node 4 is stripped from the ring at the destination node 4. After the arrival of traffic 1 at node 4, traffic 2 can be transferred from node 4 to node 3, by occupying the link capacity that would have been occupied by traffic 1 if it is not stripped at node 4.


Product Description


Figure 5-9 Spatial reuse

Node 1

Bandwidth of single ring is1.25Gbit/s

Node 2

Node 3

Node 4Dual-ring2.5 Gbit/s RPR

Traffic 11.25 Gbit/s

Traffic 21.25 Gbit/s

Fairness Algorithm The outer ring and the inner ring of an RPR support independent weighted fairness algorithm. The fairness algorithm assures access of the low-class B_EIR and C services. The weight of the fairness algorithm is provisionable to decide the access rate of a node. A node needs to set weights at the outer and the inner rings, and the two weights decide the bandwidth of low-class services upon bandwidth contention. As shown in Figure 5-10, the outer ring weights of nodes 2, 3 and 4 are 1. Suppose the available bandwidth on the outer ring for low-class services is 1.2 Gbit/s, the fairness algorithm will allocate 400 Mbit/s for the low-class services from nodes 2, 3 and 4 to node 1 respectively. Figure 5-11 shows a fairness algorithm with different weights: the weights of nodes 2, 3 and 4 on the outer ring are 1, 3 and 2. The fairness algorithm allocates 200 Mbit/s for node 2, 600 Mbit/s for node 3 and 400 Mbit/s for node 4.



Figure 5-10 Fairness algorithm when the weight is 1

Node 1

Node 2

Node 5

Node 6

Dual-ring2.5 Gbit/s RPR

Node 4

Node 3

1

3

2

23

Traffic Bandwidth400 Mbit/s400 Mbit/s400 Mbit/s

1

Node3Node4

Node WeightNode2 1

11

Figure 5-11 Fairness algorithm when the weights are different

Node 1

Node 2

Node 5

Node 6


Node 4

Node 31

3

2

23

Traffic Bandwidth400 Mbit/s600 Mbit/s200 Mbit/s

1

Node3Node4

Node WeightNode2 1

32

5.2.2 Application The N2EMR0 and N2EGR2 boards support the application of EVPL and EVPLAN services.

EVPL The EVPL service supports traffic classification based on port or port + VLAN, and encapsulates and forwards the traffic in the form of MPLS MartiniOE. Figure 5-12 illustrates the accessing, forwarding and stripping of a unidirectional EVPL service. Node 2 inserts Tunnel and VC labels to the packet, sends it to the RPR. Node 3 forwards the packet and the destination node 4 strips it. Figure 5-13 illustrates the EVPL service convergence,


Product Description


implementing traffic classification through port + VLAN, so that services can be concentrated at the GE port of node 1.

Figure 5-12 EVPL accessing, forwarding and stripping

Node 1

Node 3

FE/GE


ActionTunnel

VCDestination

Insertion100100

Node 4

LSP ActionTunnel

VC

Stripping100100

Action Forwarding

Node 4Node 2FE/GE

Figure 5-13 EVPL service convergence

Node 1

Node 3


FE

FE

GE

Node 2 Node 4

Traffic Tunnel DestinationPort1+VLAN 2

VC200 Node 2200

Port1+VLAN 3 300 Node 3300Port1+VLAN 4 400 Node 4400

FEVLAN 2

VLAN 3

VLAN 4

VLAN 4

VLAN 3VLAN 2

EVPLAN The EVPLAN service supports traffic classification based on port or port + VLAN, and encapsulates and forwards the traffic in the form of stack VLAN. The EVPLAN service is realized by creating virtual bridge (VB) in the board. VB supports source MAC address learning and static MAC route configuration. Figure 5-14 shows an example of EVPLAN service. The VB of each node determines the forward port of packets and the destination node



through address learning, rpr1 is the port to access packets to the RPR. For node 1, if the destination address is A1, the packet is forwarded through port 1; if the destination is A2, the packet is forwarded through port 2. If the destination is B1, B2 or C1, the packet is forwarded through port rpr1 to the RPR, added with a stack VLAN label being 100. Node 2 forwards packets in the same way.

Figure 5-14 EVPLAN service

A2

Node 1

Node 3


Node 2 Node 4

MAC stack VLANPortA1 noneA2 noneport 2B1 100rpr1

Port 1

B2 100rpr1C1 100rpr1

Port 2

Port 1

Port 2

Port 1

A1

B1

B2

C1

port 1

MAC forwarding table of node 1

MAC stack VLANPortA1 100A2 100rpr1B1 noneport 1B2 noneport 2C1 100rpr1

rpr1

MAC forwarding table of node 2

5.2.3 Protection The RPR service of the OptiX OSN equipment takes the protection of several levels, including:

Wrapping, Steering and Wrapping + Steering LCAS RSTP Protection of optical transmission layer, such as MSP, SNCP.

Wrapping The protection switching time is less than 50ms. As illustrated in Figure 5-15, traffic is transferred from node 4 to node 1 through nodes 3 and 2. If there is a fibre cut between node 2 and node 3, the two nodes will wrap the traffic and connect the two rings together to protect the traffic.


Product Description


Figure 5-15 Wrapping protection

Node 1

Node 2

Node 5

Node 6


Node 4

Node 3

XFiber cut Traffic flow

Steering For steering protection, a station shall not wrap a failed segment when a failure is detected. Instead, the source node will send traffic to the destination through a route avoiding the failed link. When there are not more than 16 nodes on the ring, the protection switching time is less than 50ms. The steering protection does not waste bandwidth, but it needs longer switching time when the networking is in large scale and some data before setting up a route may be lost when networking is in large scale.

Figure 5-16 illustrates an example of steering protection. Node 4 sends traffic to node 1 on the outer ring through nodes 3 and 2. If there is a fiber cut between node 2 and node 3, the topology discovery function helps the traffic be transferred to node 1 over the inner ring through nodes 5 and 6.



Figure 5-16 Steering protection

Node 1

Node 2

Node 5

Node 6


Node 4

Node 3

XFiber cut

Traffic flowafter switching

Traffic flow beforeswitching

Wrapping+Steering The protection method of wrapping+steering switches the services first in the way of wrapping upon a failure on the ring, to ensure the switching speed and minimum packet loss. After the topology discovery protocol updates the topology after the failure, steering method works to ensure that the services are sent to the destination node through the best path in the new topology, which minimizes the waste of bandwidth.

Figure 5-17 shows an example of wrapping+steering protection. Before a failure occurs in the ring, the service from node 4 to node 1 passes through node 3 and node 2 and reaches node 1 along the outer ring. When a fiber cut is detected between node 2 and node 3, wrapping method takes effect. The service is looped back at nodes 2 and 3. After the topology discovery protocol updates the topology, steering method triggers a switching. The service passes through nodes 5 and 6 and reaches node 1 along the inner ring based on the new topology.


Product Description


Figure 5-17 teering protection

X Node 1

Node 2

Node 5

Node 6


Node 4

Node 3

Fiber cut

Traffic flowafter switching

Node 1

Node 2

Node 5

Node 6


Node 4

Node 3

XFiber cut Traffic flow

LCAS LCAS adds and reduces the bandwidth dynamically, and protects the bandwidth.

For details about LCAS, refer to "5.1.3 Protection".

RSTP The RPR boards support rapid spanning tree protocol (RSTP). The RSTP protects the link by restructuring the topology. When the RSTP is started, it can modify the logic network topology to avoid broadcast storms.



MSP and SNCP Ethernet service is protected by MSP, SNCP in optical transmission layer.

5.3 ATM Features This section describes the ATM features of the OptiX OSN 7500 in terms of functionality, application, and protection.

5.3.1 Functions The OptiX OSN 7500 provides four different ATM processing boards: ADL4, ADQ1, IDL4 and IDQ1. The IDL4 and the IDQ1 support inverse multiplexing for ATM (IMA). An ADL4/1IDL4 board accesses and processes one STM-4 ATM service and an ADQ1/IDQ1 board accesses and processes four STM-1 ATM services. When working with the N1PL3/N1PD3 board, the N1ADL4 board or N1ADQ1 board accesses and processes E3 ATM services.

The functions of the ADL4, ADQ1 boards are listed in Table 5-6. The functions of the N1IDL4, N1IDQ1 boards are listed in Table 5-7.

Table 5-6 Functions of the ADL4, ADQ1 boards

Function ADL4 ADQ1

Front panel interface 1 % STM-4 4 % STM-1

Optical interface specification

S-4.1, L-4.1, L-4.2 or Ve-4.2 Ie-1, S-1.1, L-1.1 L-1.2 or Ve-1.2

Optical connector LC

Optical module SFP

E3 ATM interface Accesses 12 % E3 services through the N1PD3, N1PL3, or PL3A board.

IMA Not supported Not supported


8 VC-4s, or 12 VC-3s + 4 VC-4s

ATM switching capability 1.2 Gbit/s 1.2 Gbit/s

Mapping mode VC-3, VC-4, or VC-4-xv (x≤4)

Processable service types CBR, rt-VBR, nrt-VBR and UBR

Number of ATM connections

2048

Traffic type and QoS IETF RFC2514, ATM forum TM 4.0

Supportable ATM multicast connections

Spatial multicast and logic multicast


Product Description


Function ADL4 ADQ1

ATM protection (ITU-T I.630)

Unidirectional/Bidirectional 1+1, VP-Ring or VC-Ring

OAM function (ITU-T I.610)

AIS, RDI, LB (Loopback), CC (continuity check)

Table 5-7 Functions of the N1IDL4, N1IDQ1 boards

Function N1IDL4 N1IDQ1

Front panel interface 1 % STM-4 4 % STM-1

Optical interface specification

S-4.1, L-4.1, L-4.2 or Ve-4.2 Ie-1, S-1.1, L-1.1 L-1.2 or Ve-1.2


Optical module SFP

E3 ATM interface Not supported Not supported

IMA (compliant with ATM Forum IMA 1.1 )

Accesses and processes IMA service when working with the E1 processing board N1PQ1 or N1PQM. Supports up to 63 IMA E1 services. Supports up to 16 IMA groups mapped to the ATM port, and each group supports 1–32 E1s. Supports up to 16 E1 links of none-IMA group mapped to ATM port. Supports maximum IMA multi-path delay 226ms.


8 VC-4, or 63 VC-12 + 7 VC-4

ATM switching capability

1 Gbit/s

Mapping mode VC-12, VC-4, or VC-4-xv (x≤4)

Service type CBR, rt-VBR, nrt-VBR and UBR

Number of ATM connections

2048 2048

Traffic type and QoS

IETF RFC2514, ATM forum TM 4.0

Supportable ATM multicast connections

Spatial multicast and logic multicast

ATM protection (ITU-T I.630)

Unidirectional/Bidirectional 1+1, VP-Ring, VC-Ring



Function N1IDL4 N1IDQ1

OAM function (ITU-T I.610)

AIS, RDI, LB (loopback), CC (continuity check)

Board level 1+1 protection

Supported, with switching time less than 1s

5.3.2 Application

Supportable Services and Traffic Types The OptiX OSN 7500 supports CBR, rt-VBR, nrt-VBR, and UBR services rather than ABR services.

CBR services apply to voice services, as well as video services and circuit simulation services of a constant bit rate. These services require guaranteed transmission bandwidth and latency.

Rt-VBR services apply to audio and video services of a variable bit rate. Nrt-VBR services are mainly used for data transmission. UBR services are generally used for LAN simulation and file transmission.

In terms of the supported service and traffic types, the OptiX OSN 7500 meets IETF RFC2514, ATM Forum TM 4.0 and ATM Forum UNI 3.1 recommendations, as shown in the Table 5-8.

Table 5-8 Supportable ATM service and traffic types of the OptiX OSN 7500

No. Traffic type Service type Parameter

1 atmNoTrafficDescriptor UBR None

UBR.1 Clp01Pcr 2 atmNoClpNoScr

CBR Clp01Pcr

3 atmClpNoTaggingNoScr CBR Clp01Pcr, Clp0Pcr

4 atmClpTaggingNoScr CBR Clp01Pcr, Clp0Pcr

5 atmNoClpScr nrt-VBR.1 Clp01Pcr, Clp01Scr, Mbs

6 atmClpNoTaggingScr nrt-VBR.2 Clp01Pcr, Clp0Scr, Mbs

7 atmClpTaggingScr nrt-VBR.3 Clp01Pcr, Clp0Scr, Mbs

8 atmClpTransparentNoScr CBR.1 Clp01Pcr, Cdvt

9 atmClpTransparentScr rt-VBR.1 Clp01Pcr, Clp01Scr, Mbs, Cdvt

10 atmNoClpTaggingNoScr UBR.2 Clp01Pcr, Cdvt

UBR Clp01Pcr, Cdvt 11 atmNoClpNoScrCdvt

CBR Clp01Pcr, Cdvt


Product Description


No. Traffic type Service type Parameter

12 atmNoClpScrCdvt rt-VBR.1 Clp01Pcr, Clp01Scr, Mbs, Cdvt

13 atmClpNoTaggingScrCdvt rt-VBR.2 Clp01Pcr, Clp0Scr, Mbs, Cdvt

14 atmClpTaggingScrCdvt rt-VBR.3 Clp01Pcr, Clp0Scr, Mbs, Cdvt

Application of Band Exclusive ATM Services When the bandwidth is not shared, ATM services at the source and sink NEs are only processed at the ATM layer through the ATM service process board. On intermediate NEs, only SDH timeslot pass-through is performed, without ATM layer processing. In this case, each ATM service has the whole VC-3/VC-4 channel to itself. The ATM services are converged at the central node and then multiplexed to an STM-1 or STM-4 optical port for output.

As shown in the Figure 5-18, the 34 Mbit/s ATM services of NE1 and NE3 each occupy a VC-3 bandwidth. The 155 Mbit/s ATM service of NE2 occupies a VC-4 bandwidth alone. SDH timeslot pass-through is only performed at NE3. After the services from NEs 1, 2, and 3 reach the central site NE4, the services are converged through the ATM board and output through the 622 Mbit/s optical interface.

Figure 5-18 Application of Band exclusive ATM Services

2.5 Gbit/s SDHRing

NE 2 NE 4

NE 1

NE 3

34M ATMTraffic

34M ATMTraffic

155M ATMTraffic 622M ATM

Traffic

ServiceConvergence

DSLAM

DSLAM

RouterDSLAM

Application of Band-Shared ATM Services In shared rings VR-Ring and VC-Ring, the ATM services share the same bandwidth and are multiplexed statistically. The ATM services on each NE share the same VC (VC-3, VC-4, or VC-Xv) and are all processed on ATM layer.



As shown in the Figure 5-19, NE1 accesses E3 ATM traffic through the tributary board and sends it to the ATM board for ATM switching and protection (1+1/1:1) configuration. Then the traffic is encapsulated into VC-4-Xv and sent to the line through the cross-connect board. NE2 accesses STM-1 ATM traffic through the optical interface and then implements ATM switching and protection configuration. The ATM traffic from NE1 is also dropped at NE2 for ATM layer processing. Then the locally accessed traffic and the traffic from NE1 are encapsulated into the same VC-4-Xv and sent to the next NE. The same goes at NE3 and NE4. A single VP/VC-Ring can have a maximum bandwidth of 300 Mbit/s.

Figure 5-19 VP/VC-Ring

VC4-Xv VP/VC-Ring

NE 2

NE 4

NE 1

NE 3

34M ATMTraffic

34M ATMTraffic

155M ATM Traffic

622M ATMTraffic

DSLAM

DSLAM

Router

DSLAM

The ATM traffic from NE1 is droped tothe NE2, then send to VP/VC-Ring after

converged with local service.

IMA Services The inverse multiplexing for ATM (IMA) technology is applied to de-multiplex an ATM integrated cell flow into several low-rate links. At the far end, the low-rate links are multiplexed to restore the integrated cell flow. Hence, several low-rate links are flexibly multiplexed.

The IMA technology is applicable when ATM cells are transmitted on E1 or other rate interfaces. The IMA technology is applied only to provide a channel but not process service types and ATM cells. The signals of ATM layer or higher layer are transparently transmitted.

Two boards with IMA features are available for the OptiX OSN 7500. They are the IDL4 and the IDQ1 boards.

Figure 5-20 illustrates the ATM service networking and port allocation.


Product Description


Figure 5-20 ATM service networking and port allocation

STM -16 two-fiberbidirectional M SP ring

NE1

NE2

NE3

NE4

OptiX OSN 3500 ATM switch DSLAM

10M

10M

10M

20M 20M

30M

20M155 M bit/soptical interface

155 M bit/soptical interface

155 M bit/soptical interface

155 Mbit/soptical interface

155 M bit/soptical interface155 Mbit/s

optical interface

5.3.3 Protection The ATM service of the OptiX OSN equipment is protected on many layers, including:

Protection on the ATM layer Protection on the optical transmission layer, such as MSP 1+1 board level protection of IMA boards

Protection on the ATM Layer Compliant with ITU-T Recommendation I.630, protection on the ATM layer is classified into many types according to different classification method, as shown in the Table 5-9. Select the configuration as required, for example, 1+1 bidirectional non-revertive protection.

Table 5-9 Classification of ATM protection

Classification mode 1+1 protection 1:1 protection

Switching direction Unidirectional protection Bidirectional protection

Connection level VPC protection VCC protection

Protection domain Trail protection Subnetwork connection protection

Revertiblility Revertive protection Non-revertive protection

Protected object Single connection protection Group connection protection



Protection on the Optical Transmission Layer The ATM service is also protected by the self-healing network on the optical transmission layer, such as MSP. You can set the hold-off time for ATM protection switching. When network impairment occurs, the MSP on lower layers can be switched first, thus achieving the protection of working ATM service (in this case, the protection switching on the ATM layer will not be activated).

1+1Board Level Protection of IMA boards The IDL4 and IDQ1 support the 1+1 board level protection. When configure 1+1 board level protection, the IDL4 and IDQ1 must be inserted in the paired the slots.

5.4 SAN Features The OptiX OSN 7500 provides a multi-service transparent transmission processing board: N1MST4, to access and transmit transparently:

Fibre channel (FC) Fibre connection (FICON) Enterprise systems connection (ESCON) Digital video broadcast – asynchronous serial interface (DVB-ASI) services

Table 5-10 lists the functions of the N1MST4.

Table 5-10 Functions of the N1MST4 board

Function N1MST4

Optical interface 4


Optical module SFP

Bandwidth 2.5 Gbit/s

FC100/FICON and FC200 Provides 4 % FC (FC100/FICON and FC200), with total bandwidth less than 2.5 Gbit/s. Supports transmission of FC service at full rate, that is, supports FC200, 2 % FC100.

Distance The first and second interfaces support FC service distance extension function: FC100 supports 3000 km, and FC200 supports 1500 km.

Mapping mode VC-4-xc (x=4, 8, 16)

Encapsulation GFP-T

ESCON Supports 4 % ESCON services.

DVB-ASI Supports 4 % DVB-ASI services.


Product Description


The services and rates provided by the N1MST4 are shown in Table 5-11

Table 5-11 Services and rates provided by the N1MST4

Service type Rate Remarks

FC100/FICON 1062.5 Mbit/s SAN service

FC200 2125 Mbit/s SAN service

ESCON 200 Mbit/s SAN service

DVB-ASI 270 Mbit/s Video service

5.5 DDN Feature This section describes the DDN feature provided by the OptiX OSN product in terms of function and application.

5.5.1 Function The OptiX OSN 7500 accesses and processes DDN services through DX1, DXA and DM12 boards. The DX1 board accesses 8 % Frame E1 and 8 % N % 64 kbit/s services. The DXA board aggregates and cross-connects N % 64 kbit/s signals. The DM12 board provides interfaces for Frame E1 and N % 64 kbit/s services. The DDN interface unit is described in details below. Table 5-12 provides the function features of the N1DX1 and the N1DXA.

Table 5-12 Function features of the N1DX1 and the N1DXA

Board Feature

N1DX1 (N1DM12) N1DXA

Processing capability

Processes 8 % N % 64 kbit/s and 8 % Frame E1 services. Cross-connects 48 % 64 kbit/s signals at system side

Cross-connects 63 % N % 64 kbit/s signals at system side

Bandwidth at SDH side

48 % E1 63 % E1

Interface specifications

N % 64 bit/s interface: V.24, RS449, RS530, RS530A, V.35, V.24 and X.21 Frame E1 interface: FAS, CRC4

None

Interface impedance

75 ohm or 120 ohm None

Connector type

The connectors are on the DM12 board: DB28 for N % 64 bit/s signals and DB44 for Frame E1 signals.

None



Board Feature

N1DX1 (N1DM12) N1DXA

Protection 1: N TPS protection with switching time less than 50ms.

Not supported.

Loopback Inloop or outloop for all ports

PRBS self-check

Supported Not supported

Alarm and performance

Rich alarms and performance events are provided to facilitate management and maintenance of equipment.

Rich alarms and performance events are provided to facilitate management and maintenance of equipment.

5.5.2 Application Configure the board, which can access and converge DDN services, in the OptiX OSN equipment. The SDH network enjoys the capability to access and groom DDN services.

The N1DX1 and the N1DXA boards are mainly applied in the following occasions for routers and video conferences terminal:

Point to point transmission Point to multi-point transmission Multi-point to multipoint transmission Access and convergence of multi-point routers

Therefore, various services, such as V.24, RS449, RS530, RS530A, V.35, V.24, X.21 and Framed E1, can be accessed into the transmission network.

The N1DX1 and the N1DXA boards are applicable to DDN private line networks for:

Large and middle enterprises Government departments Stockjobbers and banks

OptiX OSN 7500 Product Description 6 Intelligent Features


6 Intelligent Features

About This Chapter


Section Describes

6.1 Topology Auto-Discovery This section describes topology auto-classification.

6.2 End-to-End Service Configuration

This section describes how to realize end-to-end services.

6.3 Mesh Networking Protection and Restoration

This section describes the mesh networking protection and restoration.

6.4 Service Level Agreement This section describes different classes of services.

6.5 Service Association This section describes service association.

6.6 Service Optimization This section describes the features of the service optimization function.

6.7 Equilibrium of Network Traffic

This section describes features of equilibrium of network traffic.

6.8 The Shared Risk Link Group

This section describes the features of SRLG.

6.9 ASON Trail Group This section describes the ASON Trail Group.

6.10 Service Migration This section describes the ASON service migration.

6.11 Reverting Services to Original Routes

This section describes how to reserve the network-wide services to the original routes.

6.12 Encrypting Protocols This section describes ASON encrypting protocols.

6 Intelligent Features OptiX OSN 7500

Product Description


6.1 Topology Auto-Discovery 6.1.1 Control Link Auto-Discovery

After the fibers in an ASON network are connected correctly, each ASON NE discovers control links automatically through OSPF and floods its own control links to the whole network. Each NE then gets the network-wide control links, that is, the network-wide control topology. Then, each NE can calculate the route to any of the other NEs in the network.

As shown in Figure 6-1, after the fibers in the whole network are connected, ASON NEs discover the network-wide control topology.

Figure 6-1 Control link auto-discovery

R1

R2

R3

R4

:ASON NE

:User equipment

6.1.2 TE Link Auto-Discovery After an ASON NE creates a control channel between neighbor NEs through LMP, TE link verification can be started. Each ASON NE floods its own TE links to the whole network through OSPF-TE. Each NE then gets the network-wide TE links, that is, the network-wide resource topology.

ASON software can detect resource topology change in real time, including the deletion and addition of links, as well as the link parameters change, and then reports the change to T2000, which performs real-time refresh.

As shown in Figure 6-2, if one TE link is cut, the NM updates the resource topology displayed on the NM in real time.



Figure 6-2 TE link auto-discovery

:ASON NE

:User equipment

R1

R2

R3

R4

6.2 End-to-End Service Configuration The ASON supports both SDH permanent connections and end-to-end ASON services. To configure an ASON service, you only need to specify its source node, sink node, bandwidth requirement, and protection level. Service routing and cross-connection at intermediate nodes are all automatically completed by the network. You can also set explicit node, excluded node, explicit link and excluded link to constrain the service routing.

Compared with service configuration of SDH networks, it fully utilizes the routing and signaling functions of the ASON NEs and thus it is convenient to configure services.

Take the configuration of a 155 Mbit/s ASON service between A and I in Figure 6-3 for example. The network automatically finds the A-D-E-I route and configures cross-connection at nodes A, D, E and I. Although there is more than one route from A to I, the network will calculate the best route according to the configured algorithm. Here we suppose A-D-E-I is the best route.

The service is created as follows:

Choose the bandwidth granularity. Choose the service protection level. Choose the source node. Choose the sink node. Create the service.


Product Description


Figure 6-3 End-to-end service configuration

:ASON NE

:User equipment

R1

R2

R3

R4

AB

C

D

E

F

GH

I

6.3 Mesh Networking Protection and Restoration The ASON provides mesh networking protection to enhance service survivability and network security. As a main networking mode of ASON, mesh features high flexibility and scalability. Different from traditional SDH networking modes, mesh networking does not need 50% bandwidth reserved so it can save bandwidth resources to satisfy the increasingly large bandwidth demands. This networking mode also provides more than one route for each service so it can best utilize the network resources with higher security.

As shown in Figure 6-4, when the C-G link failed, to restore the service, the network will calculate another route from D to H and create a new LSP to transmit the service.



Figure 6-4 Trail restoration

R1

R2

R3

R4

AB

C

D

E

F

GH

I

Trail restoration

:ASON NE

:User equipment

6.4 Service Level Agreement The ASON network can provide services of different QoS to different clients. This is service level agreement (SLA).Table 6-1 lists the service level in the ASON network.

Table 6-1 Service level

Service Protection and Restoration Scheme

Implementation Means

Switching and Rerouting Time

Diamond service Protection and restoration SNCP and rerouting Switching time < 50ms Rerouting time < 2 s

Gold service Protection and restoration MSP and rerouting Switching time < 50ms Rerouting time < 2 s

Silver service Restoration Rerouting Rerouting time < 2 s

Copper service No protection No restoration

- -

Iron service Preemptable MSP -

Table 6-2 lists details of the TE links used by ASON services.


Product Description


Table 6-2 TE links used by ASON services

Service Level Working Resource of TE Link

Protection Resource of TE Link

Non-protection Resource of TE Link

Service creation

Not used Not used Used

Service rerouting

Not used Used when the resource is not enough

Used with the priority

Diamond service

Service optimization


Service creation

Used with the priority Not used Used when the resource is not enough

Service rerouting

Used with the priority Used when the resource is not enough

Used when the resource is not enough

Gold service


Used with the priority Not used Used when the resource is not enough

Service creation


Service rerouting

Not used Used when the resource is not enough

Used with the priority

Silver service



Service creation

Not used Not used Used Copper service



Iron service

Service creation

Not used Used with the priority Used when the resource is not enough

6.4.1 Diamond Services A diamond service is a service with 1+1 protection from the source node to the sink node. It is also called 1+1 service. For a diamond service, there are two different LSPs available between the source node and the sink node. One is the working LSP and the other is the protection LSP. The same service is transmitted to the working LSP and the protection LSP at the same time. If the working LSP is normal, the sink node receives the service from the working LSP; otherwise, from the protection LSP.

Figure 6-5 shows a diamond service.



Figure 6-5 A diamond service

:ASON NE

:User equipment

R1

R2

R3

R4

AB

C

D

E

F

GH

I

Protection LSP

Working LSP

There are three types of diamond services.

Permanent 1+1 diamond service: rerouting is triggered once an LSP fails. Rerouting 1+1 diamond service: rerouting is triggered only when both LSPs fail. Non-rerouting diamond service: rerouting is never triggered.

Table 6-3 lists the attributes of the permanent 1+1 diamond service.

Table 6-4 lists the attributes of the rerouting 1+1 diamond service.

Table 6-5 lists the attributes of the non-rerouting 1+1 diamond service.

Table 6-3 Attributes of the permanent 1+1 diamond services

Attribute Diamond Service

Requirements for creation

Sufficient non-protection resources are available between the source node and the sink node.

Protection and restoration

If resources are ample, the permanent 1+1 protected diamond services are always provided with two separate LSP. One LSP is in working state and the other is on standby. If there is a lack of resources, only one LSP can be retained in order to guarantee the service survivability.

Rerouting Supports rerouting lockout. Supports rerouting priority. Supports three rerouting policies: overlapping policy, separating policy and best route policy.

Revertive Revertive services support reverting to original route automatically.Non-revertive services support reverting to the original route manually.


Product Description



Service migration Supports migration between permanent SNCP connections and diamond services. Supports migration between diamond services and silver services. Supports migration between diamond services and copper services.

Service switching Supports manual switching.

Service optimization Supports service optimization.

Service association Not supports service association.

ASON server trail Not supports diamond ASON server trails.

Alarms to trigger rerouting

R_LOS, R_LOF, B2_EXC, B2_SD, MS_AIS, MS_RDI and AU_AIS alarms

Table 6-4 Attributes of the rerouting 1+1 diamond services





When the standby LSP fails, services are not switched. Rerouting is not triggered. When the active LSP fails, services are switched to the standby LSP for transmission. Rerouting is not triggered. When both the active and the standby LSPs fail, rerouting is triggered to create a new LSP to restore services.




Service switching Supports manual switching

Service optimization Supports service optimization








Table 6-5 Attributes of the non-rerouting diamond services





When the active LSP fails, services are switched to the standby LSP for transmission. Rerouting is not triggered. When the standby LSP fails, services are not switched. Rerouting is not triggered. When both the active and the standby LSPs fail, rerouting is not triggered.






6.4.2 Gold Services A gold service needs only one LSP. This LSP must use multiplex section working links. When a fiber on the path of a gold service is cut, the ASON triggers MSP switching to protect the service at first. If the multiplex section protection fails, the ASON will trigger rerouting to restore the service.

As shown in Figure 6-6, a gold service can be configured from A to I.


Product Description


Figure 6-6 A gold service

R1

R2

R3

R4

:ASON NE

:User equipment

AB

C

D

E

F

GH

I

MSP

MSP

MSP

Table 6-6 lists the attributes of gold services.

Table 6-6 Attributes of gold services

Attribute Gold Service


Sufficient working resources or non-protection resources are available between the source node and the sink node.

Multiplex section protection

Supports using the working resources of 1:1 linear multiplex section protection chain to create gold services. Supports using the working resources of two-fiber bidirectional multiplex section protection ring to create gold services. Supports using the working resources of four-fiber bidirectional multiplex section protection ring to create gold services


When fiber is cut for the first time, MS switching is performed to protect services. When MS switching fails, rerouting is then triggered to restore services.

Rerouting Supports rerouting lockout. Supports three rerouting policies: overlapping policy, separating policy and best route policy.


Service migration Supports migration between permanent connections and gold services.




Attribute Gold Service


ASON server trail Supports gold ASON server trails.



6.4.3 Silver Service Silver services are also called rerouting services. Upon an LSP failure, periodical rerouting is performed until the rerouting succeeds. If there are not enough resources, it may fail to apply for a proper protection route, which then leads to service interruption.

As shown in Figure 6-7, A-B-G-H-I is a silver service trail. If the fiber between B and G is cut, the ASON triggers rerouting from A to create a new LSP that does not pass the cut fiber. Hence, services are protected.

Figure 6-7 A silver service

:ASON NE

:User equipment

R1

R2

R3

R4

AB

C

D

E

F

GH

I

Table 6-7 lists the attributes of silver services.

Table 6-7 Attributes of silver services

Attribute Silver service

Requirements for creation Sufficient non-protection resources are available between the source node and the sink node.

Service restoration When the original LSP fails, rerouting is triggered to create a new LSP to restore services.


Product Description




Revertive Revertive services support reverting to original route automatically. Non-revertive services support reverting to the original route manually.

Pre-configuration of restoring route

Supports pre-configuration of the restoring route

Service migration Supports migration between permanent connections and silver services. Supports migration between diamond services and silver services. Supports migration between silver services and copper services.



ASON server trail Supports silver ASON server trails.

Alarms to trigger rerouting R_LOS, R_LOF, B2_EXC, B2_SD, MS_AIS, MS_RDI and AU_AIS alarms

6.4.4 Copper Services Copper services are also called non-protection services. If its LSP fails, services do not reroute and are interrupted.

Table 6-8 lists the attributes of copper services.

Table 6-8 Attributes of copper services




Service restoration Not supports rerouting

Service migration Supports migration between permanent connections and copper services. Supports migration between diamond services and copper services.Supports migration between silver services and copper services.





Service association Supports service association

ASON server trail Supports ASON server trails

6.4.5 Iron Services An iron service is also called a preemptible service. Iron services apply non-protection links or MS protection links to create LSPs. During MS switching, iron services may be preempted and be interrupted. When the MS recovers, iron services are recovered. Interruption, preemption and recovery of iron services are reported to the T2000.When an LSP fails, services are interrupted and rerouting is not triggered.

Table 6-9 lists the attributes of iron service.

Table 6-9 Attributes of iron services

Attribute Iron Services


Sufficient protection resources or non-protection resources are available between the source node and the sink node.

MS To create iron services, the following resources can be used: Protection resources of 1:1 linear MSP Protection resources of two-fiber bidirectional MSP Protection resources of four-fiber bidirectional MSP

Service restoration Not supports rerouting

Service migration Supports migration between iron services and extra permanent connections.

Service optimization Supports service optimization.

6.4.6 Tunnel Services The ASON supports tunnel services. Tunnel services are mainly used to carry VC-12 or VC-3 services. Tunnel services are also called as ASON server trails.

The configuration of a tunnel service is different from that of the above-mentioned service types. Its cross-connection from the tributary board to the line board can only be configured manually. As shown in Figure 6-8, there is an ASON server trail between NE1 and NE2 which can be a gold ASON server trail, silver ASON server trail or copper ASON server trail. During service creation, the ASON automatically chooses the line boards of NE1 and NE2 and the timeslots of the line boards.

After creating tunnel services, you must manually create and delete the lower order cross-connection from the tributary board to the line board. During rerouting or optimization of the tunnel services, however, the cross-connections at the source and sink nodes automatically switch to the new ports.


Product Description


Figure 6-8 Tunnel services

VC12

NE1 NE2

VC12ASON server trail

VC4

VC12

Cross-connection

Line unitTributary unit

Table 6-10 lists the attributes of tunnel services.

Table 6-10 Attributes of tunnel services

Attribute Gold tunnel services

Silver tunnel services

Copper tunnel services


Same as gold services

Same as silver services

Same as copper services

Service restoration

Same as gold services

Same as silver services

Not supports rerouting

Rerouting Supports rerouting lockout. Supports rerouting priority.

Supports rerouting lockout. Supports rerouting priority.

Not supports rerouting

Revertive Not supported

Pre-configuration of restoring route

Not supported Supports pre-configuration of the restoring route

Not supported

Service association

Not supported Supports Supports

Service migration

Supports migration between tunnel services and permanent connections. Supports migration between silver tunnel services and copper services.


Supports service optimization

Tunnel level VC-4



6.5 Service Association Service association is to associate two ASON services that have different routes. During the rerouting or optimization of either service, the rerouting service will avoid the route of the associated service.

As shown in Figure 6-9, D-E-I and A-B-G-H are two associated LSPs. When the fiber between B and G is cut, the rerouting of the A-B-G-H LSP will avoid the D-E-I LSP.

Figure 6-9 Service Association

R1

R2

R3

R4

:ASON NE

: User equipment

AB

C

D

E

F

GH

I

1+1protection

1+1protection

Table 6-11 lists the attributes of service association.

Table 6-11 Attributes of service association

Attribute Service association


Supports optimization of associated services

Rerouting When one service reroutes, it will avoid the route of the associated service.

Service type Supports the association of two silver services. Supports association of two copper services. Supports the association of a silver service and a copper service. Supports the association of two silver tunnel services. Supports the association of two copper tunnel services. Supports the association of a silver tunnel service and a copper tunnel service.


Product Description


6.6 Service Optimization After the topology change several times, the ASON may have less satisfactory routes and thus need service optimization. Service optimization means to create a new LSP, switch the optimized service to the new LSP, and delete the original LSP so as to change and optimize the service without disrupting the service.

LSP optimization has the following features.

Only manual optimization is supported. The optimization does not change the protection level of the optimized service. During optimization, rerouting, degrade/upgrade, or deleting operations are not allowed. During creation, rerouting, degrading/upgrading, starting or deleting operations,

optimization is not allowed. The following service types support optimization: diamond, gold, silver, copper and

tunnel services.

6.7 Equilibrium of Network Traffic The ASON calculates a best route according to CSPF algorithm. If there are many services between two nodes, there may be several services sharing a same route. The traffic equilibrium function is used to avoid this situation. As shown in Figure 6-10, there are many silver services between R2 and R4. To make the network more safe and reliable, the ASON allocates them to different route averagely as possible such as A-D-E-I, A-B-C-F-I and A-B-G-H-I.

Figure 6-10 Traffic equilibrium

:ASON NE

:User equipment

R1

R2

R3

R4

AB

C

D

E

F

GH

I



6.8 The Shared Risk Link Group Fibers in the same optical cable have the same risks, that is, when the cable is cut, all fibers are cut. So an ASON service should not be rerouted to another link that has the same risk.

Set the SRLG attribute correctly for the links of the same risks to make sure the two LSPs of a diamond service are not in the same cable and to enhance the possibility of successful rerouting at the first time. You can change the SRLG attribute.

6.9 ASON Trail Group The ASON supports amalgamation of ASON and LCAS.

6.9.1 LCAS LCAS is Link Capacity Adjustment Scheme.

With LCAS enabled, the bandwidth of VCTRUNK can be adjusted dynamically without affecting services. As shown in Figure 6-11, VCTRUNK1 is bound with four VC4s, with two transmitted over path 1 and two over path 2. If the VC-4 in path 1 fails, the two VC4s in path 2 will transmit all Ethernet service without affecting the service of VCTRUNK1. You can add VC-4 on either path if necessary.

Figure 6-11 LCAS (different path)

Router BRouter A NE1 NE2

VCTRUNK1

Path 1

Path 2

If these VC4s are transmitted over a path, adding/deleting VC-4 will not affect the service. As shown in Figure 6-12, VCTRUNK1 is bound with four VC4s. If the first VC-4 fails, the Ethernet service remains unaffected.

Figure 6-12 LCAS (same path)

Router BRouter A NE1 NE2

VCTRUNK1


Product Description


6.9.2 ASON Trail Group An ASON trail group associates all member trails for the same LCAS service within one LSP group. These member trails then can be added, deleted or modified. To provide virtual services with the error tolerance ability, these member trails must be as separate as possible. Each ASON trail group is identified by an ID. The ASON NE allocates an ID to each ASON trail group. The member trails within an ASON trail share the same source and sink. The trails must also be as separated as possible.

6.10 Service Migration 6.10.1 Service Migration between ASON Trails and Permanent Connections

Currently, Huawei's ASON supports:

Migration between diamond services and permanent SNCP connections. Migration between gold services and permanent connections. Migration between silver services and permanent connections. Migration between copper services and permanent connections. Migration between iron services and permanent connections. Migration between tunnel services and server trail.

6.10.2 Service Migration between ASON Trails Currently, Huawei's ASON supports:

Migration between diamond services and silver services. Migration between diamond services and copper services. Migration between silver services and copper services.

6.11 Reverting Services to Original Routes After many changes in an ASON network, service routes may differ from the original routes. You can revert all service to the original routes.

Table 6-12 lists the reverting service to original routs.

Table 6-12 Reverting service to original routes

Attribution Non-revertive services Revertive services

Prerequisites The original route has no failures and has free timeslots.

The original route has no failures.

Reverting mode Manual Automatic

Batch reverting Supports -



Attribution Non-revertive services Revertive services

Timeslots Reverting services to original routes. Not reverting services to original timeslots.

Reverting services to original routes. Reverting services to original timeslots.

Modifying original route

Supported Not supported

6.12 Encrypting Protocols You can encrypt the RSVP and OSPF in an ASON domain to improve the security of the network.

OptiX OSN 7500 Product Description 7 Protection


7 Protection

About This Chapter


Section Describes

7.1 Equipment Level Protection

This section describes the equipment level protection of OptiX OSN 7500.

7.2 Network Level Protection This section describes the network level protection of OptiX OSN 7500.

7 Protection OptiX OSN 7500

Product Description


7.1 Equipment Level Protection The OptiX OSN 7500 supports the following protection schemes at the equipment level:

TPS Protection for Service Processing Boards 1+1 Protection for the N1EMS4 and the N1EGS4 1+1 Backup for ATM Interface Boards Protection for the Wavelength Conversion Unit 1+1 Backup for the Cross-Connect and Timing Unit 1+1 Backup for the SCC Unit 1+1 Backup for the Power Input Unit 1:N Protection for Board +3.3 V Power Supply Intelligent Fans Abnormality-Specific Board Protection

7.1.1 TPS Protection for Service Processing Boards The OptiX OSN 7500 provides TPS protection for the service processing boards. Table 7-1 lists TPS protection types and the boards supported by each protection type. Table 7-2 lists TPS protection parameters.

Table 7-1 TPS protection types and supported boards

Service type Protection mode Board supported

E1/T1 One group of 1:N (N≤4) protection N1PQ1, N1PQM, N2PQ1

E3/T3/E4/STM-1 One group of 1:N (N≤3) protection or two groups of 1:1

N1PD3, N1PL3, N2SPQ4, N1SEP

Ethernet One group of 1:1 N2EFS0, N4EFS0

DDN One group of 1:N (N≤4) protection N1DX1

Note:The N2PQ1 board does not support T1 services.



Table 7-2 TPS protection parameters

Parameter Description

Priority 1–X. "X" is the number of the working boards. The priority of "1" is the highest.

Switching type Forced switching, manual switching, locked switching

Switching conditions

The clock of the working board is lost. The working board is offline. The working board is under a cold reset. The working board hardware fails. The switching command is issued.

Switching time ≤50ms

Recovery mode Revertive

WTR Time 300s–720s 600s is recommended

7.1.2 1+1 Protection for the N1EMS4 and N1EGS4 The N1EMS4 and the N1EGS4 support 1+1 protection of BPS and PPS.

Table 7-3 provides the 1+1 protection parameters of the N1EMS4 and the N1EGS4 boards.

Table 7-3 1+1 protection parameters of the N1EMS4 board


Active board and standby board slots

Set as required.

Switching conditions The port status of the active board is Link Down The clock of the active board is lost The active board hardware fails The switching command is issued

Recovery mode Non-revertive

Switching time ≤ 350ms

When the following prerequisites are met, the protection group then can switch in an active manner.

The equipment in connection with the protection group is of the same working mode with the protection group.

The transmit end and the receive end should be connected directly through optical fibers or network cables. No equipment should be present between the two ends.


Product Description


The working mode should not be modified before the protection group is deleted; otherwise, the protection group works abnormally.

The equipment cannot detect the modification of the working mode at the receive end of the protection group.

7.1.3 1+1 Backup for ATM Interface Boards The N1IDL4 and N1IDQ1 of the OptiX OSN 7500 support board level 1+1 protection. The switching time is less than 50ms.

Table 7-4 provides the 1+1 protection parameters of the ATM board.

Table 7-4 1+1 protection parameters of the ATM board

Description Parameter

N1IDL4, N1IDQ1


Set as required.

Switching conditions Manual switching. Board power fails. Board clock fails. Board hardware fails.

Recovery mode Non-revertive

Switching time ≤ 50ms

7.1.4 Protection for the Wavelength Conversion Unit The arbitrary bit rate wavelength conversion unit N1LWX is of two types: single-fed single receiving and dual-fed signal selection.

The dual-fed signal selection N1LWX supports intra-board protection, realising optical channel protection with one board. The protection switching time is less than 50ms. The single-fed single receiving N1LWX supports inter-board protection, that is, 1+1 inter-board hot backup protection. The protection switching time is less than 50ms.

Table 7-5 provides the 1+1 protection parameters of the N1LWX board.

Table 7-5 1+1 protection parameters of the N1LWX board


Active board and standby board slots Set as required.

Switching conditions The active board hardware fails The switching command is issued

Switching time ≤50ms



7.1.5 1+1 Backup for the Cross-Connect and Timing Unit The cross-connection and timing functions are provided by the GXCSA, EXCSA, UXCSA and SXCSA board. These boards use 1+1 backup for protecting the cross-connect unit and the timing unit at the same time.

Table 7-6 provides the 1+1 hot backup parameters of the cross-connect unit and the timing unit.

Table 7-6 1+1 hot backup parameters of the cross-connect unit and the timing unit



Slot 9 is for the active board and slot 10 is for the standby board.

Switching conditions The active board is offline The active board is under a cold reset The active board hardware fails The switching command is issued

Recovery mode Non-revertive After switching, the original standby board becomes the working board, while the original active board becomes the standby board

7.1.6 1+1 Backup for the SCC Unit The SCC unit of the OptiX OSN 7500 is provided with 1+1 backup protection. The standby SCC unit is in standby mode when the active one is working normally.

Table 7-7 provides the 1+1 hot backup parameters of the SCC unit.

Table 7-7 1+1 hot backup parameters of the SCC unit



Slot 17 is for the active board and slot 18 is for the standby board

Switching conditions The active board is offline The active board is under a cold reset The active board hardware fails The switching command is issued

Recovery mode Non-revertive After switching, the original standby board becomes the working board, while the original active board becomes the standby board


Product Description


7.1.7 1+1 Backup for the Power Input Unit Through the two T1PIU boards, the OptiX OSN 7500 accesses two –48 V DC inputs that work for mutual backup. If either of them goes faulty, the other will operate to ensure the normal operation of the equipment.

7.1.8 1:N Protection for Board +3.3 V Power Supply The power backup unit of the T1AUX board of the OptiX OSN 7500 is used to provide 1:N reliable power backup for the +3.3 V power supply of other boards, including the SCC and service boards. When the board power supply fails, the backup power supply works immediately to ensure that the board operates normally.

7.1.9 Intelligent Fans The OptiX OSN 7500 adopts three intelligent fan units for heat dissipation. The power supplies for the fans serve as backup for each other.

The intelligent fans provide the functions of intelligent speed regulation and failure detection. Once one of the fan modules goes faulty, the other two will operate at their full speed. The running status of the fans can be indicated by the corresponding indicators on the front panel of the fan unit.

7.1.10 Abnormality-Specific Board Protection

Power Failure during Software Loading Application programme and data have the check function. When software loading is interrupted, the basic input/output system (BIOS) will not start the unfinished programme and data until they are successfully loaded.

Over-Voltage and Under-Voltage Protection The power board is designed with a lightning protection component to effectively reduce the damages that may be possibly caused by transient high-voltage such as lightning. When the voltage is over low, this board will automatically reset the centre processing unit (CPU) and the software will reinitialize the chips. The software will provide a mirror protection for important memories that may affect the services. When the voltage is not stable, which causes the memory value to change, the values can be recovered to normal. In addition, when the voltage is too low, the power system will automatically cut off the active power to protect the system.

Board Temperature Check The temperature detection circuit is provided on the boards that generate much heat, such as the GXCSA or EXCSA board. When the ambient temperature detected is too high, an alarm is generated to remind the maintenance personnel to clean the fans.



7.2 Network Level Protection The OptiX OSN 7500 supports the following network level protection:

Linear MSP MSP ring Sub-network connection protection (SNCP and SNCMP) Protection for Interworking Service in Rings Fibre-Shared Virtual Path Protection MS-Shared optical path protection Protection of Resilient Packet Ring VP-Ring/VC-Ring protection

7.2.1 Linear MSP Linear MSP is mainly used in the chain network. The OptiX OSN 7500 supports 1+1 and 1:N (N ≤14) protection schemes. In the 1:N protection mode, extra services can be transmitted on the protection facility. In the linear MSP scheme, the switching time is less than 50ms as specified in ITU-T Recommendation G.841.

For details, see section "2.2 Chain Network" of OptiX OSN 7500 Intelligent Optical Switching System Planning Guidelines.

Table 7-8 provides the linear MSP parameters.

Table 7-8 Linear MSP parameters

Protection type Recovery mode

Switching protocol

Switching time

Default WTR

Switching conditions

1+1 unidirectional switching

Non-revertive Not required ≤50ms -

1+1 unidirectional switching

Revertive Not required ≤50ms 600s

1+1 bidirectional switching

Non-revertive APS protocol

≤50ms -

1+1 bidirectional switching

Revertive APS protocol

≤50ms 600s

1:N bidirectional switching

Revertive APS protocol

≤50ms 600s

R_LOS R_LOF MS_AIS B2_EXC B2_SD Forced switching Manual switching Exercise switching


Product Description


7.2.2 MSP Ring The OptiX OSN 7500 supports two-fibre MS shared protection ring, with the switching time less than 50ms, as specified in ITU-T Recommendation G.841.

In line with ITU-T Recommendation G.841, the OptiX OSN 7500 supports four-fibre MS shared protection ring, which provides ring switching and span switching in addition to the similar functions of the two-fibre bidirectional MSP.

Table 7-9 lists the maximum number of STM-64 and STM-16 MS rings supported.

For details, see OptiX OSN 7500 Intelligent Optical Switching System Planning Guidelines.

Table 7-9 Maximum number of MSP rings supported by the OptiX OSN 7500

Protection scheme Max. number of MSP rings

STM-64 four-fibre MSP ring 5

STM-64 two-fibre MSP ring 11

STM-16 four-fibre MSP ring 11

STM-16 two-fibre MSP ring 40

Table 7-10 provides the MSP ring parameters.

Table 7-10 MSP ring parameters

Protection type

Recovery mode

Switching mode Switching time

WTR Switching conditions

Two-Fibre bidirectional protection

Revertive Forced switching Manual switching Exercise switching

≤50ms 600s

Two-Fibre unidirectional protection

Revertive Forced switching Manual switching Exercise switching

≤50ms 600s

Four-Fibre bidirectional protection

Revertive Forced ring switching Manual ring switching Exercise ring switching Forced section switching Manual section switching Exercise section switching

≤50ms 600s

R_LOS R_LOF MS_AIS B2_EXC B2_SD Forced switching Manual switching Exercise switching

Adjustable MS Bandwidth The MS bandwidth is actually the number of VC-4 in the MSP ring or MSP chain.



In terms of MSP, the OptiX OSN 7500 supports bandwidth adjustment by VC-4, that is, for an STM-64 two-fibre bidirectional MSP ring, its MS bandwidth can change from one VC-4 to thirty-two VC-4s.

Upgrading MS Bandwidth The OptiX OSN 7500 supports MS bandwidth upgrading which is non-service affecting. For example, we can upgrade an STM-16 MSP ring to an STM-64 MSP ring.

Two Sets of MS K Bytes For the STM-64 optical interface, the OptiX OSN 7500 can process two sets of MS K bytes simultaneously. Up to two MS rings can be constructed through an STM-64 optical interface.

Suppression Function in MS The OptiX OSN 7500 can suppress misconnected VC-4 services. In the MSP ring, each protection timeslot is shared by different segments or occupied by extra traffic. When there is no extra traffic within the ring, if a certain node is segregated due to failure of multiple nodes, the traffic of different segments that occupies the same timeslot may contend for the timeslot and result in misconnection of traffic. When there is extra traffic transmitted over the protection path, even in the case of failure of a single node, the traffic of the working path may contend for the timeslot on the protection path that carry extra traffic and result in misconnection.

To prevent misconnection, a detailed connection table is created for each node of the OptiX OSN 7500. Each node knows the source point and destination point of each AU-4. Then through APS commands, the node can detect probable misconnection in advance, and discard the probably misconnected traffic by inserting the AU-AIS alarm.

7.2.3 SNCP The OptiX OSN 7500 supports the subnetwork connection protection (SNCP) and the subnetwork connection multipath protection (SNCMP), for subnetworks that meet the ITU-T G.841 requirements.

SNCP The OptiX OSN 7500 supports the end-to-end conversion between an unprotected trail and an SNCP-protected trail, as shown in Figure 7-1.


Product Description


Figure 7-1 End to end conversion of an unprotected trail to an SNCP-protected trail

NE1NE4

NE3

NE2NE5

NE8

NE7NE6

A unprotected trail

NE1NE4

NE3

NE2NE5

NE8

NE7NE6

The working trailConvert to a SNCP-protected trail

Convert to a unprotected trail

The protection trail

Table 7-11 provides the SNCP parameters.

Table 7-11 SNCP parameters

Protection type

Recovery mode

Switching time

WTR Switching conditions

Revertive ≤50ms 600s SNCP

Non-revertive ≤50ms -

R_LOS AU_LOP TU_LOP MS_AIS AU_AIS TU_AIS HP_UNEQ HP_TIM B2_EXC B3_EXC B3_SD

An existing unprotected trail can be converted to an SNCP-protected trail from trail management in the T2000. An SNCP-protected trail can also be converted to an unprotected trail. Furthermore, the following operations can be provided at trail level:

Manual switching to protection path Manual switching to working path



Forced switching to protection path Forced switching to working path Setting of the wait-to-restore (WTR) time Setting of the revertive or non-revertive mode

SNCMP The subnetwork connection multipath protection (SNCMP) is an N+1 (which means multiple protection paths protect a working path, Nñ3) protection scheme. The SNCMP is different from the SNCP in that the SNCP is a 1+1 protection scheme.

The SNCMP provides multiple protection paths for a service. In this case, the service protection is implemented by a mechanism of multiple fed at the source and selective receiving at the sink. The SNCMP is supplementary to the SNCP. While the SNCP protects services only in a line-to-line manner, the SNCMP protects services whose source and sink can both be in the line direction or in the tributary direction.

Figure 7-2 illustrates the principle of multipath protection. The source broadcasts services to multiple paths, and the sink determines which service to receive according to the service priority and then the service quality. When services are correctly received on both the working and protection paths, the sink selects the service from the working path.

Figure 7-2 Principle of multipath protection

Source Sink

Working

Protection 1

Protection 2

Protection 3

Intermediatesubnetworks

A B

In the SNCMP networking shown in Figure 7-3, two protection paths protect a working path, and Protection 2 is a protection path that uses microwave as the transmission media. Under normal conditions, NE3 receives the service from the working path.


Product Description


Figure 7-3 SNCMP networking

NE 1

NE 2

NE 3

NE 4

WorkingProtection 1

Protection 2

MicrowareRadio

MicrowareRadio

When the transmission between NE1 and NE2 becomes faulty, as shown in Figure 7-4, NE3 receives the service from the higher priority protection path Protection 1.

Figure 7-4 SNCMP service route in the case of single point failure

NE 1

NE 2

NE 3

NE 4

WorkingProtection 1

Protection 2

MicrowareRadio

MicrowareRadio

When the transmissions between NE1 and NE2, and between NE1 and NE4, both become faulty, as shown in Figure 7-5, NE3 receives the service from the second protection path Protection 2.



Figure 7-5 SNCMP service route in the case of multipoint failure

NE 1

NE 2

NE 3

NE 4

WorkingProtection 1

Protection 2

MicrowareRadio

MicrowareRadio

7.2.4 DNI The OptiX OSN 7500 supports the dual node interconnection (DNI) protection, which is line with the ITU-T G.842.

DNI is a protection scheme, which requires two interconnected nodes. This protection scheme enhances the reliability of inter-ring services. This scheme can be applied to protect the services between two rings, which is formed by equipment from different vendors and takes different protection schemes. This scheme can also provide protection when fiber is cut or any node goes faulty.

DNI is applied to provide protection for services in the listed rings.

SNCP ring and SNCP ring SNCP ring and MSP ring MSP ring and MSP ring

Figure 7-6 shows the DNI protection of two SNCP rings.


Product Description


Figure 7-6 DNI protection of two SNCP rings

SNCP Ring 1

SNCP Ring 2

NE E

NE DNE C

NE F

NE G

NE A

Selecting Point

Forward Working Routing

Reverse Working Routing

When any of the listed faults occurs, the inter-ring services can be protected.

Fiber is cut at 1 of the SNCP ring Fiber is cut at 2 of the SNCP ring Fiber is cut at both SNCP ring The NEC (primary node) and the NED (secondary node) goes faulty The NEE (primary node) or NEF (secondary node) goes faulty The NEC and the NEF nodes go faulty The NED and the NEF nodes go faulty

The primary node and the secondary node protect each other. When one node goes faulty, services whose trails route across SNCP rings are not affected and travel normally.



7.2.5 Fibre-Shared Virtual Path Protection

Figure 7-7 Fibre-shared virtual path protection

STM-16SNCP

STM-16MSP

STM-64

STM

-64

As shown in Figure 7-7, in the fibre-shared virtual path protection, one STM-16, STM-4, or even STM-1 optical path is logically divided into lower-order or higher-order paths, which are then combined with other links to form the path-level rings. The path-level rings can be set with protection schemes such as MSP, SNCP, and non-protection.

7.2.6 MS-Shared Optical Path Protection In the MS-shared optical path protection, an optical interface can be configured with multiple MSP groups, so that MSP rings can share the same fibre and optical interface. This function is conditioned on the optical board’s capability of processing multiple sets of independent K bytes. T2SL64, T2SL64A, N1SL64, N1SL16(A), N2SL16(A), N1SF16 and N1SF64 of the OptiX OSN 7500 support a maximum of two sets of K bytes.

Figure 7-8 shows the networking for two-fibre MS-shared optical path protection that the OptiX OSN 7500 supports.

Figure 7-8 MS-shared optical path protection

STM-4 MS-shared ring

STM-16

STM-4 STM-4

STM-4STM-4

STM-4 MS-shared ring

For example, two lower-speed west line units share one higher-speed east line unit, as shown in Figure 7-9.


Product Description


Figure 7-9 Two lower-speed lines share one higher-speed line

STM-16

MSP ring 1

MSP ring 2X

STM-16

STM-16

STM-64

The OptiX OSN 7500 also supports the line units at the same speed to form a bidirectional sharing protection, as shown in Figure 7-10. In this case, the west STM-16 line units can only add part of VC-4 into the MSP ring group.

Figure 7-10 Sharing protection of the lines the lin same speed

STM-16

MSP ring 1

MSP ring 2X

STM-16

STM-16

STM-16

7.2.7 Protection of Resilient Packet Ring Figure 7-11 shows a bidirectional resilient Ethernet ring. Both the outer ring and the inner ring transmit data packets and control packets. The control packet of the inner ring carries the control information of the data packets in outer ring and the process for the outer ring is reversed.

The Ethernet ring has a merit that the packets sent to the ring are assumed by each node would finally reach their respective destination, regardless of which channel used. Because each node has only three kinds of operation on the packet: packet insertion (insert a new packet to the ring), packet forwarding (forward the packet), and packet dropping (drop the packet to the local site). This merit greatly reduced the communication workload between nodes, especially when compared with the mesh network that has to decide to forward to which port according to each packet.



Figure 7-11 Bidirectional RPR

Node 1

Outer ring

Node 2

Node 3

Node 4

Node 5

Inner ring

RPR

Upon a fibre cut, RPR starts wrapping and packet steering function. Wrapping is to connect the outer ring with the inner ring at the two nodes adjacent to the fibre cut point, as shown in Figure 7-12. Packet steering is to transmit the packet in the opposite direction at the transmitting node, as shown in Figure 7-13.

In either way, the packet can reach the destination from the opposite direction and the failure time is less than 50ms. The OptiX OSN 7500 performs wrapping for general protection switching at the beginning, and then performs steering when the new topology and service path are established. Then no packet will be lost during protection switching and the switching time is shortened.

Figure 7-12 Wrapping of RPR

Node 1

Outer ring

Node 2

Node 3

Node 4

Node 5

Inner ring

RPR

Wapping


Product Description


Figure 7-13 Steering of RPR

Outer ring

Inner ring

Node 1Node 2

Node 3

Node 4

Node 5

RPR

Steering

7.2.8 VP-Ring/VC-Ring Protection Figure 7-14 shows the VP-Ring/VC-Ring protection switching on the ATM layer. VP-Ring/VC-Ring protection reserves protection resources to achieve protection. It can be used on any physical topology. The reserved protection resources include routes and bandwidth.

Figure 7-14 VP-Ring/VC-Ring protection

NE1 NE3

Working path

Protection path

NE4

ATM service ATM service

The OptiX OSN 7500 provides protection for VP/VC. ATM service is protected by adopting the mode of dual-fed and selective receiving. Two connections (working path and protection path) are created respectively between the source node NE1 and the sink node NE3. Normally, the receive end selects the service transmitted over the working path. When the primary ring fails, the receive end starts protection after detecting relevant failure information, and switches the received service to the protection path, thus achieving the protection of ATM services.

OptiX OSN 7500 Product Description 8 Clock


8 Clock

About This Chapter


Section Describes

8.1 Clock Sources This section describes the clock source of OptiX OSN 7500.

8.2 Clock Working Mode This section describes the clock working mode of OptiX OSN 7500.

8.3 Clock Outputs This section describes the clock output of OptiX OSN 7500.

8.4 Clock Protection This section describes the clock protection of OptiX OSN 7500.

8.5 Tributary Retiming This section describes the tributary retiming of OptiX OSN 7500.

8 Clock OptiX OSN 7500

Product Description


8.1 Clock Sources The OptiX OSN 7500 can trace the following clock sources:

External clock source Line clock source Tributary clock source Internal clock source

The OptiX OSN 7500 supports setting priorities of clock sources. By default, the internal clock is of the least priority.

8.1.1 External Clock Source The OptiX OSN 7500 supports two external clock source inputs.

Support two 75 ohm external clock inputs (2048 kbit/s or 2048 kHz). Support two 120 ohm external clock inputs (2048 kbit/s or 2048 kHz).

8.1.2 Line Clock Source The OptiX OSN 7500 can trace line clock source.

8.1.3 Tributary Clock Source When an NE tracings the tributary clock source, the relations between the NM ports that can be traced, and the board physical ports are listed below.

When tracing tributary clock sources, the network element can only trace the first port (corresponding to the first physical port) or the second port (corresponding to the ninth physical port) on the T2000 of PQ1 or PQM.

When tracing tributary clock sources, the network element can only trace the first port (corresponding to the first physical port) or the second port (corresponding to the fourth physical port) on the T2000 of PD3.

When tracing tributary clock sources, the network element can only trace the first port (corresponding to the first physical port) on the T2000 of PL3.

8.1.4 Internal Clock Source When external clock source, line clock source and tributary clock source fail, internal clock source provides clock for the OptiX OSN 7500.

8.2 Clock Working Mode The OptiX OSN 7500 supports the clock working mode that complies with ITU-T G.781.

Locked mode Hold-over mode Free-run mode



8.2.1 Locked Mode Under locked mode, the OptiX OSN 7500 traces one clock source of all lines, tributaries and external clock sources.

8.2.2 Hold-Over Mode If all clock sources are lost, the OptiX OSN 7500 utilises the frequency information stored before the loss as its clock source to operate. The frequency information complies with the related phase standard defined in G.813.

8.2.3 Free-Run Mode The OptiX OSN 7500 works under the inherent frequency of its internal crystal oscillator whose frequency stability is not worse than ±4.6 ppm.

8.3 Clock Outputs The OptiX OSN 7500 supports the following clock outputs:

Line clock outputs Tributary clock outputs External clock outputs

For tributary clock outputs, the OptiX OSN 7500 supports tributary retiming function that improves the quality of output tributary clock.

The OptiX OSN 7500 supports the following external clock outputs:

Two 75 ohm external clock outputs (2048 kbit/s or 2048 kHz) Two 120 ohm external clock outputs (2048 kbit/s or 2048 kHz)

For external clock outputs, the OptiX OSN 7500 supports two 75 ohm external clock outputs or two 120 ohm external clock outputs, but can not support 75 ohm and 120 ohm at the same time.

8.4 Clock Protection The clock of the OptiX OSN 7500 can be configured as:

Synchronisation status message (SSM) disabled Standard SSM enabled Extended SSM enabled

8.4.1 Clock Configuration with SSM Disabled The OptiX OSN 7500 selects and switches the clock source according to the priority table. The clock source of highest priority is the trace source. The priority table can be configured manually. Figure 8-1 shows the clock configuration and the priority table when SSM is disabled.


Product Description


Figure 8-1 Networking of clock with disabled SSM

Slot 8 Slot 11

Slot 11 Slot 8

Slot 8

Slot 11

Slot 11

Slot 8

BITS

Node 2Priority 1: Slot 11Priority 2: Slot 8Priority 3: Internal


Node 1Priority 1: BITSPriority 2: Internal


Clock tracing

If there is a fibre break in the loop, the clock will be traced mutually, as shown in Figure 8-2:

Figure 8-2 Clock mutual tracing caused by fibre break

Slot 8 Slot 11

Slot 11 Slot 8

Slot 8

Slot 11

Slot 11

Slot 8

BITS

Fibre break

Clock mutualtracing

Clocktracing

If the SSM function is not enabled, it is not recommended to configure the east and west clocks of an NE into the clock source priority table at the same time.

8.4.2 Clock Configuration with Standard SSM Enabled Standard SSM, a mechanism for synchronisation management in an SDH network, allows switching the quality information of clock source among nodes, thus the OptiX OSN 7500 can automatically choose the clock source of the highest quality and priority to prevent the occurrence of clock mutual tracing, as shown in Figure 8-3. Standard SSM is loaded in the lower four-digit bits (bit5–bit 8) of the S1 byte in SDH section overheads.



Figure 8-3 SSM application

Slot 8 Slot 11

Slot 11 Slot 8

Slot 8

Slot 11

Slot 11

Slot 8

BITS

Fibrebreak

Node 3, Node 2 will automaticallyselect the clock source of bestquality.

Node 2

Node 1

Node 3

Node 4

Clocktracing

8.4.3 Clock Configuration with Extended SSM Enabled Standard SSM cannot avoid the clock mutual tracing completely, as shown in Figure 8-4. Huawei puts forward the concept of clock source ID, which is defined using the higher four-digit bits (bit1–bit4) of the S1 byte and transmitted with SSM. The SSM with clock ID is called extended SSM. When a node receives the S1 byte, it checks the clock source ID to judge whether it is originated from this station. If so, the clock source is unavailable, thus the clock mutual tracing can be avoided, as shown in Figure 8-5.

Figure 8-4 Clock mutual tracing occurs when enabling SSM

BITSBITSfailure

Clock mutual tracingcaused by BITS failure

Node 2

Node 1

Node 3

Node 4

BITS

Node 2

Node 1

Node 3

Node 4

Clocktracing


Product Description


Figure 8-5 Application of clock source ID

Node 2

BITS failure

BITS

Node 1

Node 3

Node 4

Node 1 finds that the ID sent from Node 4 is1, which is originated from itself. Node 1 willnot trace it to avoid the clock mutual tracing.

Clock tracing

A clock ID can be allocated by NM or set manually. In an SDH ring network, the clock ID is usually set manually to effectively prevent the occurrence of mutual tracing. The clock ID is necessary only in key points. Follow the principles below to set the clock ID.

Allocate a clock ID for every external BITS. Allocate a clock ID for the internal clock source of every node with external BITS. Allocate a clock ID for the internal clock source of the junction node of a ring and chain

or two rings. For a junction node, if the clock tracing level includes ring clock source, allocate a clock

ID for this clock source.

8.5 Tributary Retiming Retiming combines the timing reference signal from digital synchronization networks and the traffic data for transmission to users.

8.5.1 Principle of Retiming Retiming clears the issue that 2048 kbit/s tributary signals cannot carry timing reference in SDH systems. Figure 8-6 shows the principle of retiming.

Figure 8-6 Functional diagram of retiming

Desynchronization

PLL

Retiming buffer

SECSDH clock

source

Extract clock（f ）

Extract clock（f ）

ff

Input tributary signal Outputtributary signal

1

01

0



Extract clock f1 from the received tributary signals through phase-lock loop (PLL). Extract the data of the tributary signals precisely through desynchronization. Store the extracted data into retiming buffer. Then, read out the data of the tributary signals through the SDH equipment clock (SEC) f0 that is synchronous with the digital synchronization networks. Thus, the output tributary signals carry the timing reference of high quality, which can be the timing reference for equipment requiring synchronization.

8.5.2 Application of Retimin

PDH signals passing through an SDH network without retiming. Figure 8-7 shows the situation that PDH signals pass through an SDH network without retiming. As shown in the following figure, the reference frequency f1 at the transmitting end of equipment A locks f0 to avoid periodic sliding. During .the process of mapping PDH signals into SDH networks, there are great phase variations in PDH tributary output signals because of pointer justification. Thus, the frequency f1 of the output tributary PDH signals is not synchronous with the f0. The frequency of the output signals cannot be used as the timing reference for equipment B (such as, digital remote switch).

Figure 8-7 An SDH network without retiming

Frequency of tributarysignals cannot be thesynchronous clock of

equipment B

SDH network

EquipmentA

S

S

SS SDH

MUXEquipment

B

PRC

U

U

UUSDH

MUX

f1

f1

f0 f0

f1

f1 :frequency of PDH signalsf0:frequency tracing SDH

reference frequency (PRC)

PRC:SDH primary reference clockS:synchronize U:desynchronize R:retiming

PDH signals passing through an SDH network with retiming. Figure 8-8 shows the situation that PDH signals pass through an SDH network with retiming. As shown in the following figure, the reference frequency f1 at the transmitting end of equipment A locks f0 to avoid periodic sliding. The local timing reference f0 is provided through retiming at the output edge of the network. The wander and jitter caused by pointer justification are absorbed. Thus, the frequency f1 of the output tributary signals is synchronous with the f0. The equipment B can extract the output tributary signals for synchronization.


Product Description


Figure 8-8 An SDH network with retiming

EquipmentB

Frequency oftributary signals canbe the synchronous

clock of equipment B

EquipmentA

S

S

SS SDH

MUX

PRC

R

SDHMUX

f1

f0

f0 f0

f1

f1 :frequency of PDH signalsf0 :frequency tracing SDH

reference frequency (PRC) SEC

U

U

UU

SDH network

SEC:SDH equipment clockPRC:SDH primary reference clockS:synchronize U:desynchronize R:retiming

f0

The network in Figure 8-8 can be one SDH network, several SDH networks, or the network including both SDH and PDH.

8.5.3 Boards Supporting Retiming In Huawei OSN series products, the PQ1 and PQM boards provide retiming function

OptiX OSN 7500 Product Description 9 OAM


9 OAM

About This Chapter


Section Describes

9.1 Operation and Maintenance

This section describes the operation and maintenance functions of the OptiX OSN 7500.

9.2 Administration This section describes the network management communication scheme supported by the OptiX OSN 7500.

9.3 Security Management This section describes the security management function of the OptiX OSN 7500.

9 OAM OptiX OSN 7500

Product Description


9.1 Operation and Maintenance The OptiX OSN 7500 provides the following features to meet the customer’s needs for operation administration and maintenance (OAM).

The N2GSCC board generates audible and visual alarms to remind the network administrators to take proper measures in the case of any emergency.

Provides 16 alarm input interfaces, four alarm output interfaces, four cabinet alarm indicator output interfaces, and alarm concatenation interfaces to facilitate operation and management of the equipment.

All boards are provided with running and alarm indicators to help the network administrators to locate and handle faults at the earliest.

The line board provides the function of the lower order path monitoring. The alarms can be monitored if impairment affects the lower order services on the line board. These alarms include TU_AIS and TU_LOP.

The subrack supports automatic laser shutdown (ALS) function of the single-mode optical interface of the SDH interface unit and Ethernet interface unit.

It supports automatic online detection of optical power of SDH and Ethernet optical interfaces.

The swappable optical module is adopted to provide optical interface boards. Users can choose single-mode or multimode optical modules as required, thus facilitating maintenance.

Orderwire phone function is provided to ensure dedicated communication channels for administrators at various stations.

By means of the NM system, the running and alarm status of the equipment at all stations on the network are dynamically monitored.

In-service upgrade of board software and NE software is supported. Board software and field programmable gate array (FPGA) supports remote loading, and provides the functions of error prevention loading and resume download.

With remote maintenance function, the maintenance personnel can remotely maintain the OptiX OSN 7500 through PSTN when the equipment goes faulty.

The PQ1/PQM provides pseudo-random binary sequence function which supports remote bit error test.

9.2 Administration The OptiX OSN 7500 is managed by the transport network management system (NM) of iManager series.

Through the Qx interface, the NM system manages, maintains and tests the entire optical transmission system in terms of fault, performance, configuration and security.

The OptiX OSN 7500 supports the uniform NMS that is based on the simple network management protocol (SNMP). The uniform NMS can be used to manage equipment from different vendors.

The NM system improves the quality of network services, lowers the maintenance cost and ensures rational use of network resources. Non-gateway NEs connects to the gateway NEs through ECC to transmit NM information.



Three schemes are applied for the communication between the OptiX OSN 7500 and the NM.

ECC over DCC IP over DCC OSI over DCC

9.2.1 ECC over DCC The DCC consists of two parts:

D1–D3 bytes in regenerator section, forming a 192 kbit/s channel D4–D12 bytes in multiplex section, forming a 576 kbit/s channel

Currently, only the D1–D3 bytes are used by the transmission equipment. The D4–D12 bytes are reserved for higher management requirements.

The OptiX OSN 7500 can provide the capability to process 160 embedded control channels (ECC).

Figure 9-1 illustrates the communication interfaces between the OptiX OSN series equipment, and between the NM and the OptiX OSN equipment.

Figure 9-1 Network management interface

T2000

Qx

ECC

ECC

ECC

ECC

NM Information Transmitted Transparently by Third Party Equipment When there is a piece of third party equipment between the OptiX OSN 7500 systems, the bytes D4–D12 of the third party equipment will be used to transmit the NM information, as shown in Figure 9-2.


Product Description


Figure 9-2 NM information transmitted transparently by third party equipment

Third partyequipment


D1-D3 D1-D3

Transparenttransmission

Transparent Transmission of NM Information of the Third Party Equipment The NM information of the third party equipment can be transmitted by bytes D4–D12 of the OptiX OSN 7500, as shown in Figure 9-3.

Figure 9-3 Transparent Transmission of NM Information of the Third Party Equipment



D1-D3 D1-D3Transparenttransmission

9.2.2 IP over DCC The scheme of IP over DCC uses the network layer protocol for NM information transmission.

There are two cases for IP over DCC.

NM Information Transmitted Transparently by Third Party Equipment The NM information of the OptiX OSN 7500 is transmitted transparently through IP over DCC by the third party equipment, as shown in Figure 9-4.



Figure 9-4 NM information transmitted transparently by the third party equipment



IP Over DCC

Transparent Transmission of NM Information of the Third Party Equipment The NM information of the third party equipment is transmitted transparently through IP over DCC by the OptiX OSN 7500, as shown in Figure 9-5.




IP Over DCC



9.2.3 OSI Over DCC OSI over DCC adopts standard OSI protocols (also called TP4) to transmit NM information at network layer.

For OSI over DCC, there are two networking modes.


Product Description


NM Information Transmitted Transparently by Third Party Equipment The NM information of the OptiX OSN 7500 is transmitted transparently by the third party equipment through OSI over DCC, as shown in Figure 9-6.

Figure 9-6 NM Information Transmitted Transparently by Third Party Equipment



OSI Over DCC

OSI protocolstack

OSI protoclstack

OSI protocolstack

Transparent Transmission of NM Information of the Third Party Equipment The NM information of the third party equipment is transmitted transparently by the OptiX OSN 7500, as shown in Figure 9-7.




OSI Over DCC



OSIprotocolstack

OSI protocol

stack

OSI protocolstack



9.3 Security Management The OptiX OSN series products provide the following NE management functions:

NE user management NE log management NE log lock NE setting lock NE user group management Query of online NE users or forcing an NE user out of logging state] NE security parameters NE security log: query the operations as logging NE, deleting NE users, forcing an NE

user out of logging state

OptiX OSN 7500 Product Description 10 Technical Specifications


10 Technical Specifications

About This Chapter


Section Describes

10.1 Optical Interface Performance

This section describes the specifications of the optical interfaces for the OptiX OSN 7500.

10.2 Electrical Interface Performance

This section describes the specifications of the electrical interfaces for the OptiX OSN 7500.

10.3 Clock Performance This section describes the clock timing and synchronization function.

10.4 Transmission Performance

This section describes the transmission performance of the OptiX OSN 7500.

10.5 Power Supply Parameters This section describes the power supply parameters of the OptiX OSN 7500.

10.6 Power Consumption and Weight of Boards

This section describes the power consumption and weight of the OptiX OSN 7500.

10.7 Electromagnetic Compatibility

This section describes the electromagnetic compatibility of the OptiX OSN 7500.

10.8 Safety Management This section describes the safety authentication of the OptiX OSN 7500.

10.9 Environment Indexes This section describes the environment indexes of the OptiX OSN 7500.

10.10 Environment Requirement

This section describes the environment requirements for the OptiX OSN 7500.

10 Technical Specifications OptiX OSN 7500

Product Description


10.1 Optical Interface Performance 10.1.1 Interface Type

The following table lists the interface types of the OptiX OSN 7500 equipment.

Table 10-1 provides the Optical interfaces of the OptiX OSN 7500

Table 10-1 Optical interfaces of the OptiX OSN 7500

Interface type Rate and feature

Ethernet interface 10Base-T, 100Base-TX, 100Base-FX, 1000Base-SX, 1000Base-LX, 1000Base-ZX

ATM interface 34368 kbit/s, 155520 kbit/s, 622080 kbit/s

PDH/SDH electrical interface

1544 kbit/s, 2048 kbit/s, 34368 kbit/s, 44736 kbit/s, 139264 kbit/s, 155520 kbit/s

SDH optical interface 155520 kbit/s, 622080 kbit/s, 2488320 kbit/s, 9953280 kbit/s

Clock interface 2048 kbit/s, 2048 kHz

Alarm interface Sixteen alarm input interfaces, four alarm output interfaces, alarm concatenated interfaces, four cabinet alarm indicator interfaces

Auxiliary interface Administration interface, orderwire interface, data interface

10.1.2 SDH Optical Interface The LASER level of the STM-1 optical interface is class 1. Table 10-2 provides the performance of the STM-1 optical interface of the OptiX OSN 7500.

Table 10-2 Performances of the STM-1 optical interface of the OptiX OSN 7500

Nominal bit rate 155520 kbit/s

Classification code I-1 S-1.1 L-1.1 L-1.2 Ve-1.2

Operating wavelength (nm)

1260 to 1360

1261 to 1360

1263 to 1360

1480 to 1580

1480 to 1580

Type of optical source

MLM MLM MLM/SLM

SLM SLM

Mean launched power (dBm)

–15 to –8 –15 to –8 –5 to 0 –5 to 0 –3 to 0

Receiver minimum sensitivity (dBm)

–23 –28 –34 –34 –34

Minimum overload (dBm)

–8 –8 –10 –10 –10



Nominal bit rate 155520 kbit/s

Minimum extinction ratio (dB)

8.2 8.2 10 10 10

The LASER level of the STM-4 optical interface is class 1. Table 10-3 provides the performance of the STM-4 optical interface of the OptiX OSN 7500.

Table 10-3 Performances of the STM-4 optical interface of the OptiX OSN 7500 STM-4

Nominal Bit Rate 622080 kbit/s

Classification Code I-4 S-4.1 L-4.1 L-4.2 Ve-4.2

Operating wavelength (nm) 1261 to 1360

1274 to 1356

1280 to 1335

1480 to 1580

1480 to 1580

Type of optical source MLM MLM SLM SLM SLM


–15 to –8 –15 to –8 –3 to 2 –3 to 2 –3 to 2


–23 –28 –28 –28 –34

Minimum overload (dBm) –8 –8 –8 –8 –13


8.2 8.2 10 10 10.5



Nominal Bit Rate

2488320 kbit/s

Classification code

I-16 S-16.1 L-16.1 L-16.2 L-16.2(Je)

V-16.2(Je) (BA)

U-16.2(Je) (BA+PA)


MLM SLM SLM SLM SLM SLM SLM


1266 to 1360

1260 to 1360

1280 to 1335

1500 to 1580

1530 to 1560

1530 to 1565

1550.12

Without BA: -2 to 3

Without BA and PA: -2 to 3


–10 to –3

–5 to 0 –2 to 3 –2 to 3 5 to 7

With BA: 13 to 15

With BA: 15 to 18


Product Description


Nominal Bit Rate

2488320 kbit/s

Without BA and PA: -28


–18 –18 –27 –28 –28 –28

With PA: -32

Without BA and PA: -9


–3 0 –9 –9 –9 –9

With PA: -10


8.2 8.2 8.2 8.2 8.2 8.2 8.2

Maximum chromatic dispersion (ps/nm)

12 - - 1200 to 1600

2000 2800 3400

Table 10-5 provides the Performances of the STM-16 (FEC) optical interface of the OptiX OSN 7500

Table 10-5 Performances of the STM-16 (FEC) optical interface of the OptiX OSN 7500

Nominal Bit Rate 2.66 Gbit/s

Classification code Ue-16.2c Ue-16.2d Ue-16.2f

Classification code a SF16+BA(14dB)+PA

SF16+BA(17dB)+PA

SF16+BA(17dB)+RA+PA

Operating wavelength (nm) 1550.12 nm

Without BA and PA: -5 to -1

Without BA and PA: -5 to -1

Without BA, RA and PA: -5 to -1


With BA: 13 to 15 With BA: 13 to 15 With BA: 15 to 18

Without BA and PA: -27.5

Without BA and PA: -27.5

Without BA, RA and PA: -27.5


With PA: –37 With PA: –37 With PA: –42

Minimum overload point (dBm) b –10 –10 –10

Minimum extinction ratio (dB) c 10 10 10

a: The number in the bracket indicates the corresponding parameter, for example, BA (14) indicates that the optical power of the signal after amplified by the BA is 14 dBm. "FEC+BA+PA" indicates that the optical interface specifications include FEC, BA and PA.

b: The parameter is that of the PA.

c: Parameters in the table are of the optical modules, excluding the amplifiers.





Nominal Bit Rate 9953280 kbit/s

Classification Code

I-64.2 S-64.2b L-64.2b (BA)

Le-64.2 Ls-64.2 V-64.2b (BA +PA+DCU)


1530 to 1565

1530 to 1565

1530 to 1565

1530 to 1565

1530 to 1565

1550.12


SLM SLM SLM SLM SLM SLM

Without BA: -4 to 2

Without BA, PA and DCU: -4 to -1


–5 to –1 –1 to 2

With BA: 13 to 15

2 to 4 4 to 7

With BA: 13 to 15

Without BA, PA and DCU: –14


–14 –14 –14 –21 –21

With PA: –26

Minimum overload point (dBm)

–1 –1 –1 –8 –8 –1


8.2 8.2 8.2 8.2 8.2 8.2


500 800 1600 1200 1600 2040 (with DCU)

Table 10-7 provides performance of the STM-64 (FEC) optical interface of the OptiX OSN 7500.

Table 10-7 Performance of the STM-64 (FEC) optical interface of the OptiX OSN 7500

Nominal Bit Rate 10.71Gbit/s

Classification Code Ue-64.2c Ue-64.2d Ue-64.2e

Code content a FEC+BA(14dB)+PA+DCU(60+80)

FEC+BA(17Db)+PA+DCU(80%2)

FEC+BA(17dB)+RA+PA+DCU(60%3)


1550.12nm

Type of optical source SLM

Mean launched power (dBm)b

–4 to –1 –4 to –1 –4 to –1


Product Description


Nominal Bit Rate 10.71Gbit/s

Receiver minimum sensitivity (dBm)b

–14 –14 -14

Minimum overload point (dBm)b

–1 –1 -1

Minimum extinction ratio (Db)b

10 10 10

Dispersion capacity (ps/nm)b

800 800 800

a: The number in the bracket indicates the corresponding parameter, for example, BA (14) indicates that the optical power of the signal after amplified by the BA is 14 dBm. "FEC+BA+PA+DCU" indicates that the optical interface specifications include FEC, BA, PA and DCU.

b: The parameters in the table are for only for the optical module, not for the amplifier and the DCU.

Table 10-8 provides performance of the STM-16 and STM-64 fixed wavelength optical interface.

Table 10-8 Performance of the STM-16 and STM-64 fixed wavelength optical interface

Nominal Bit Rate 2 488 320 kbit/s 2 666 057 kbit/s

9 953 280 kbit/s

Dispersion limit (km) 170 640 640 40


–2 to 3 –5 to –1 –5 to –1 –4 to –1


–28 –28 –28 –14


–9 –9 –9 –1


3400 12800 12800 800


8.2 10 10 10

With FEC: 16 With FEC: 20 OSNR

Without FEC: 21 Without FEC: 26

Table 10-9 provides the nominal central wavelength and frequency of the STM-16 and STM-64 optical interfaces.



Table 10-9 Nominal central wavelength and frequency of STM-16 and STM-64 optical interfaces

No. Frequency (THz)

Wavelength (nm)

No. Frequency (THz)

Wavelength (nm)

1 192.1 1560.61 21 194.1 1544.53

2 192.2 1559.79 22 194.2 1543.73

3 192.3 1558.98 23 194.3 1542.94

4 192.4 1558.17 24 194.4 1542.14

5 192.5 1557.36 25 194.5 1541.35

6 192.6 1556.56 26 194.6 1540.56

7 192.7 1555.75 27 194.7 1539.77

8 192.8 1554.94 28 194.8 1538.98

9 192.9 1554.13 29 194.9 1538.19

10 193.0 1553.33 30 195.0 1537.40

11 193.1 1552.52 31 195.1 1536.61

12 193.2 1551.72 32 195.2 1535.82

13 193.3 1550.92 33 195.3 1535.04

14 193.4 1550.12 34 195.4 1534.25

15 193.5 1549.32 35 195.5 1533.47

16 193.6 1548.51 36 195.6 1532.68

17 193.7 1547.72 37 195.7 1531.90

18 193.8 1546.92 38 195.8 1531.12

19 193.9 1546.12 39 195.9 1530.33

20 194.0 1545.32 40 196.0 1529.55

10.1.3 Ethernet Optical Interface The performance of the GE optical interface of the OptiX OSN 7500 conforms to IEEE 802.3z, and that of the ME optical interface conforms to IEEE 802.3u, as shown in Table 10-10.


Product Description


Table 10-10 Specifications of Ethernet optical interface of the OptiX OSN 7500

Interface Type Type of optical source

Transmitting optical power (dBm)

Central wavelength (nm)




1000Base-ZX (70 km)

MLM –4 to 2 1480 to 1580 –3 –22 9

1000Base-ZX (40 km)

MLM –2 to 5 1270 to 1355 –3 –23 9

1000Base-LX(10 km)

MLM –9 to –3 1270 to 1355 –3 –19 9

1000Base-SX (0.55 km)

MLM –9.5 to 0 770 to 860 0 –17 9

100Base-FX (15 km)

MLM –15 to –8 1261 to 1360 –7 –28 10

100Base-FX (2 km) MLM –19 to –14 1270 to 1380 –14 –30 10

10.1.4 ATM Optical Interface The Specifications of the ATM optical interface of the OptiX OSN 7500 are shown in Table 10-11.

Table 10-11 Specifications of ATM optical interface of the OptiX OSN 7500

Nominal bit rate

155520 kbit/s 622080 kbit/s

Classification code

Ie-1 S-1.1 L-1.1 L-1.2 Ve-1.2 S-4.1 L-4.1 L-4.2 Ve-4.2


1260 to 1360

1261 to 1360

1263 to 1360

1480 to 1580

1480 to 1580

1274 to 1356

1280 to 1335

1480 to 1580

1480 to 1580


–19 to –14

–15 to –8 –5 to 0 –5 to 0

–3 to 0

–15 to –8

–3 to 2

–3 to 2

–3 to 2


–31 –28 –34 –34 –34 –28 –28 –28 –34


–14 –8 –10 –10 –10 –8 –8 –8 –13


10 8.2 10 10 10 8.2 10 10 10.5



10.1.5 LASER level Table 10-12 provides the LASER level of the optical board for the OptiX OSN 7500.

Table 10-12 LASER level of the Optical board

Optical interface LASER level Board

STM-1 Class 1 N1SLT1, N1SLQ1, N2SLQ1, N1SL1, N2SL1, N2SLO1, N1OU08, N2OU08

STM-4 Class 1 N1SLQ4, N2SLQ4, N1SLD4, N2SLD4, N1SL4, N2SL4

STM-16 Class 1 N1SF16, N1SL16, N2SL16, N1SL16A, N2SL16A, N2SLQ16

STM-64 Class 1 T2SL64, T2SL64A, N1SF64, N1SL64

Ethernet interface Class 1 N2EGS2, N2EFS0, N1EGT2, N1EFT8, N1EMS4, N1EGS4, N2EMR0, N2EGR2

ATM interface Class 1 N1ADL4, N1ADQ1, N1IDL4, N1IDQ1

SAN interface Class 1 N1MST4

Amplifier Class 1M BA2, BPA, 61COA, N1COA, 62COA

Other board interface Class 1M N1MR2A, N1MR2C, N1LWX, N1FIB, ROP

10.2 Electrical Interface Performance 10.2.1 PDH Electrical Interface

Table 10-13 provides performance of the PDH electrical interface of the OptiX OSN 7500.

Table 10-13 Performance of the PDH electrical interface

Type 1544 kbit/s

2048 kbit/s

34368 kbit/s

44736 kbit/s

139264 kbit/s

155520 kbit/s

Code pattern B8ZS, AMI

HDB3 HDB3 B3ZS CMI CMI

Bit rate of signals at output port

Permitted frequency deviation at input port

G.703 compliant

Input jitter tolerance

G.703 compliant

- - - -


Product Description


10.2.2 DDN Interface Table 10-14 lists the DDN interface performance.

Table 10-14 DDN interface performance

Interface type Description Standards

Frame E1 interface Frame E1 signals Physical and electrical features comply with ITU-T G.703. The frame structure complies with ITU-T G.704.

V.35 interface Complies with ITU-T V.35.

V.24 interface Complies with ITU-T V.24.

X.21 interface Complies with ITU-T X.21.

RS-449 interface Complies with EIARS-449 (RS-423A, RS-422A)

RS-530 interface Complies with EIARS-530.

N % 64 kbit/s interface

RS-530A interface

Complies with EIARS-530A.

10.2.3 Auxiliary Interface

64 kibt/s interface Table 10-15 lists the parameters of 64 kbit/s interface, which is the F1 interface on the T1AUX board.

Table 10-15 parameters of the 64 kbit/s interface

Parameters Description

Bit rate 64 kbit/s

Timing signals From RX

Coding style ITU-T G.703

Outgoing pulse shape ITU-T G.703

Output interface characteristics ITU-T G.703

Incoming interface characteristics ITU-T G.703

RS-232 interface Table 10-16 lists the parameters of RS-232 interface, which is the S1/S2/S3/S4 interface on the T1AUX board.



Table 10-16 Parameters of the RS-232 interface


Bit rate 19.2 kbit/s to the maximum

Mode RS-232 Tx & Rx data only

Electrical levels +/-5 V to +/-15 V

RS-422 interface Table 10-17 lists the parameters of RS-422 interface, which is the S1/S2/S3/S4 interface on the T1AUX board.

Table 10-17 Parameters of the RS-232 interface


Bit rate 19.2 kbit/s to the maximum

Mode RS-422 Tx & Rx data only

Electrical levels +/-2.0 V

Orderwire audio interface Table 10-18 lists parameters of the orderwire audio interface.

Table 10-18 Parameters of the orderwire audio interface


Speech Channel Interface

Handset Impedance 600 ohm

Bandwidth 300 to 3400 Hz

Handset Operating current 18 mA

Input Tx gain -4 / 0 / 0 dB

Output Rx gain 0 / -7 / 0 dB

Signalling DTMF compliant with ITU-T Rec. Q.23

Analog EOW Extension

Impedance 600 ohms

Bandwidth 300 to 3400 Hz

Tx level –3.5 dBr ! 1 dBr


Product Description



Rx level –3.5 dBr ! 1 dBr

10.3 Clock Performance 10.3.1 Clock Interface Type

Table 10-19 provides clock features of the OptiX OSN 7500.

Table 10-19 Clock features of the OptiX OSN 7500

Clock type Feature

External synchronisation source

Two inputs: 75-ohm 2048 kbit/s (G.703) or 2048 kHz (G.703) Two inputs: 120-ohm 2048 kbit/s (G.703) or 2048 kHz (G.703)

Synchronisation output

Two outputs: 75-ohm 2048 kbit/s (G.703) or 2048 kHz (G.703) Two outputs: 120-ohm 2048 kbit/s (G.703) or 2048 kHz (G.703)

10.3.2 Timing and Synchronisation Performance Table 10-20 lists the timing and synchronisation performance of the OptiX OSN 7500.

Table 10-20 Timing and synchronisation performance of the OptiX OSN 7500

Output jitter Output frequency of internal oscillator in free-run mode

Long-term phase variation (in locked mode)

G.813 compliant G.813 compliant G.813 compliant

10.4 Transmission Performance Table 10-21 lists the transmission performance of the OptiX OSN 7500.

Table 10-21 Transmission performance of the OptiX OSN 7500

Jitter at STM-N interface Jitter at PDH interface Bit error performance

G.813/G.825 compliant G.823/G.783 compliant G.826 compliant



10.5 Power Supply Parameters Table 10-22 provides power supply parameters of the OptiX OSN 7500.

Table 10-22 Power supply parameters of the OptiX OSN 7500

Parameter Specification

Power supply mode DC power supply

Nominal voltage –48 V or –60 V

Voltage range –38.4 V to –72 V

Power consumption 1000 W

10.6 Power Consumption and Weight of Boards Table 10-23 lists the power consumption and weight of the OptiX OSN 7500 boards.

Table 10-23 Power consumption and weight of boards

Board Power consumption(W)

Weight (kg) Board Power (W) Weight (kg)

T2SL64 30 1.12 N1D12S 9 0.35

T2SL64A 40 1.12 N1D12B 1 0.31

N1SF64 30 1.12 N1TSB8 5 0.28

N1SF16 26 1.09 N2EGS2 43.2 1.04

N1SL16, N2SL16, N1SL16A, N2SL16A

20 1.10 N1EFS4 30 0.98

N2SLQ16 38 1.3 N1EGT2 23 0.90

N1SLQ4, N2SLQ4

16 1.04 N1EFT8, N1EFT8A

26 1.01

N1SLD4, N2SLD4

15 1.01 N2EFS0, N4EFS0

35 0.98

N1SL4, N2SL4

15 1.00 N2EMR0 50 1.20

N1SLH1 22 1.04 N2EGR2 32.6 1.10

N1SLT1 15 1.22 N1ETF8 2 0.37


Product Description


Board Power consumption(W)

Weight (kg) Board Power (W) Weight (kg)

N2SLO1 26.15 1.082 N1EFF8 6 0.44

N1SLQ1, N2SLQ1

15 1.04 N1ETS8 2.5 0.37

N1SL64 30 1.129 N1ADL4 35 0.90

N1SL1, N2SL1

14 1.00 N1ADQ1 37 0.95

BA2 20 1.01 N1IDL4 35 1.02

BPA 20 1.01 N1IDQ1 37 1.02

N1SEP1, N1SEP 17 0.95 N1MST4 26 0.90

N1EU08 11 0.41 T1GXCSA 41 1.78

N1OU08, N2OU08 6 0.41 T1EXCSA 53 1.86

N2SPQ4 24 0.91 T1SXCSA 95.88 2.157

N1MU04 2 0.41 T2UXCSA 68.5 2.072

BA2, BPA 20 1.01 N1FIB 0 0.42

61COA, N1COA 10 3.5 T1EOW 13 0.45

62COA 75 8 T1AUX 3 0.42

N1PD3 19 1.12 N1FANA 19 1.50

N1PL3, N1PL3A 15 1.00 T1PIU 8 1.25

N1D34S 2 0.38 N1MR2A 0 1.01

N1C34S 2 0.31 N1MR2C 0 1.00

N1PQ1 19 1.01 N2GSCC, N3GSCC

16 0.6

N2PQ1 13 1.003 N1EGS4 65 1.10

N1PQM 22 1.01 N1DX1 15a 0.962

N1LWX 30 1.10 N1DM12 8 0.482

N1D75S 5.5 0.35 N1DXA 10 0.848

N1EMS4 65 (without interface board) 75 (with interface board)

1.11 - - -

a: the power consumption of N1DX1 board is 31 W after TPS.



10.7 Electromagnetic Compatibility Table 10-24 lists the EMC indexes of the OptiX OSN 7500.

Table 10-24 EMC test specifications

Item Standard Result

Radiated Emission CISPR22 Class A EN55022 Class A

Passed

Conducted Emission for DC Ports CISPR22 Class A EN55022 Class A

Passed

Conducted Emission for Signal Ports CISPR22 Class A EN55022 Class A

Passed

Immunity to Radiated Electric Field ETSI EN 300 386 V1.3.2 IEC 61000-4-3(10 V/m)

Passed

Immunity to Electrostatic Discharge ETSI EN 300 386 V1.3.2 IEC 61000-4-2 (Air Discharge: 8 kV; Contact Discharge:6 kV)

Passed

Immunity to Electrical Fast Transient Bursts for DC Ports

ETSI EN 300 386 V1.3.2 IEC 61000-4-4(2kV)

Passed

Immunity to Electrical Fast Transient Bursts for Signal Ports

ETSI EN 300 386 V1.3.2 IEC 61000-4-4(2kV)

Passed

Immunity to surges for DC Ports ETSI EN 300 386 V1.3.2 IEC 61000-4-5(4kV)

Passed

Immunity to surges for Signal Ports ETSI EN 300 386 V1.3.2 IEC 61000-4-5(1kV)

Passed

Immunity to Continuous Conducted Interference for DC Ports

ETSI EN 300 386 V1.3.2 IEC 61000-4-6(10V)

Passed

Immunity to Continuous Conducted Interference for Signal Ports

ETSI EN 300 386 V1.3.2 IEC 61000-4-6(10V)

Passed


Product Description


10.8 Safety Management The OptiX OSN 7500 has passed the safety authentications listed in Table 10-25.

Table 10-25 Safety authentications the OptiX OSN 7500 has passed

Discipline Standards

EMC FCC Part 15 (CFR 47) Class A VCCI Class A CISPR22 Class A EN55022 Class A AS/NZS 3548 Class A ETSI EN 300 386 V1.3.2 EN55024

Safety UL 60950 CSA C22.2 No 60950 3rd Edition IEC 60950:1999 EN 60950:2000 AS/NZS 3260

10.9 Environment Indexes Table 10-26 lists the environmental indexes with which the OptiX OSN 7500 can run normally for a long term.

Table 10-26 Environmental indexes

Item Range

Altitude ≤4000 m

Air pressure 70 kPa–106 kPa

Temperature 0°C–45°C

Relative humidity 10%–90%

Antiseismic performance Capable of resisting 7–9 Richter scale earthquake



10.10 Environment Requirement The following international standards are taken as the reference for framing the environment requirements.

GF 014-95: Environment conditions for the communication equipment room European Telecommunication Standards ( ETS) 300 019-1-3: Class 3.2 Partly

temperature-controlled locations NEBS GR-63-CORE: Network Equipment-Building System (NEBS) Requirements:

Physical Protection

10.10.1 Environment for Storage

Climate Table 10-27 provides the climate environment required for storing the OptiX OSN 7500.

Table 10-27 Climate environment for storage

Item Range

Altitude ≤5000 m


Temperature –40°C to +70°C

Temperature change rate ≤1°C/min


Solar radiation ≤1120 W/s²

Heat radiation ≤600 W/s²

Air speed ≤30 m/s

Waterproof The equipment is required to be stored indoors. No accumulated water is allowed on the floor, and no water drops on the packing box.

Keep away from auto fire fighting facilities and heating pipes where water leakage may occur.

If it is necessary to be stored outdoors, the following four conditions should be met: − The packing box must be intact. − Necessary rainproof measures must be taken to prevent rainwater from entering the

packing boxes. − Water should not enter into the packing boxes. The ground where the packing boxes

are stored should not have water. − The packing boxes must not be exposed to the sun directly.


Product Description


Biological Environment Care must be taken to avoid multiplication of microbes, such as eumycete and mycete. Avoid rodents such as mice.

Air Cleanliness Ensure there is no explosive, electric-conductive, magnetic-conductive or corrosive dust. The density of the mechanical active substances complies with the requirements listed in

Table 10-28.

Table 10-28 Density for mechanical active substances

Mechanical active substance Content

Suspending dust ≤5.00 mg/m³

Precipitable dust ≤20.0 mg/m²·h

Gravel ≤300 mg/m³

The density of the chemical active substances complies with the requirements listed in Table 10-29.

Table 10-29 Density for chemical active substances

Chemical active substance Content

SO2 ≤0.30 mg/m³

H2S ≤0.10 mg/m³

NO2 ≤0.50 mg/m³

NH3 ≤1.00 mg/m³

Cl2 ≤0.10 mg/m³

HCl ≤0.10 mg/m³

HF ≤0.01 mg/m³

O3 ≤0.05 mg/m³



Mechanical Stress Table 10-30 provides the requirements for mechanical stress

Table 10-30 Requirements for mechanical stress

Item Sub-item Range

Acceleration spectral density 1 m²/s³ -3 dBA - Random vibration

Frequency range 5Hz–20 Hz

20Hz–200 Hz

-

Impact response spectrum II ≤300 m/s², 11ms Non-steady impact

Static load 0 kPa

NOTE Static load: The pressure from upside, that the equipment with package can endure when the equipment is piled as per stipulation.

10.10.2 Environment for Transportation

Climate Table 10-31 provides the climate environment required for transporting the OptiX OSN 7500.

Table 10-31 Climate environment for transportation

Item Range

Altitude ≤5000 m


Temperature –40°C to +70°C

Temperature change rate ≤3°C/min




Air speed ≤30 m/s

Waterproof The following conditions should be met during transportation.

The packing box must be intact.


Product Description


Necessary rainproof measures should be taken for the means of transport to prevent rainwater from entering the packing boxes.

The means of transportation should not have water in it.

Biological Environment Care must be taken to avoid multiplication of microbes, such as eumycete and

mycete. Avoid rodents such as mice.


Table 10-32.



Suspending dust No requirement

Precipitable dust ≤3.0 mg/m²·h



Table 10-33 Density for chemical active substance


SO2 ≤0.30 mg/m³

H2S ≤0.10 mg/m³

NO2 ≤0.50 mg/m³

NH3 ≤1.00 mg/m³

Cl2 ≤0.10 mg/m³

HCl ≤0.10 mg/m³

HF ≤0.01 mg/m³

O3 ≤0.05 mg/m³

Mechanical Stress Table 10-34 provides the requirements for mechanical stress.




Item Sub-item Range

Acceleration spectral density

1 m²/s³ -3 dBA - Random vibration

Frequency range 5Hz–20 Hz 20Hz–200 Hz -

Impact response spectrum II ≤300 m/s², 11ms Non-steady impact

Static load 0 kPa

10.10.3 Environment for Operation

Climate Table 10-35 and Table 10-36 show the required climate environment in which the OptiX OSN 7500 operates.

Table 10-35 Requirements for temperature and humidity

Temperature Relative humidity

Long-term operation

Short-term operation

Long-term operation

Short-term operation

0°C to 45°C –5°C to 55°C 10%–90% 5%–95%

NOTE Temperature and humidity values are obtained 1.5 m above the floor and 0.4 m in front of the equipment.

Short-term operation means the consecutive working time of the equipment does not exceed 96 hours, and the accumulated working time every year does not exceed 15 days.

Table 10-36 Other climate requirements

Item Range

Altitude ≤4000 m


Temperature change rate ≤5°C/h



Air speed ≤1 m/s


Product Description


Biological Environment Care must be taken to avoid multiplication of microbes, such as eumycete and mycete. Avoid rodents such as mice.


Table 10-37.



Dust particle ≤3x105 particles/m³

Suspending dust ≤0.4 mg/m³

Precipitable dust ≤15 mg/m²·h



Table 10-38 Density for chemical active substances


SO2 ≤0.20 mg/m³

H2S ≤0.006 mg/m³

NH3 ≤0.05 mg/m³

Cl2 ≤0.01 mg/m³

HCl ≤0.10 mg/m³

HF ≤0.01 mg/m³

O3 ≤0.005 mg/m³

CO ≤5.0 mg/m³

Mechanical Stress Table 10-39 provides the Requirements for mechanical stress.




Item Sub-item Range

velocity [5mm/s -

Acceleration - [2 m/s2

Sinusoidal vibration

Frequency range 5Hz–62 Hz 62Hz–200 Hz

Impact response spectrum II

Half-sina wave, ≤300 m/s², 11ms Impact

Static load 0 kPa

NOTE Static load: The pressure from upside, that the equipment with package can endure when the equipment is piled as per stipulation.

01-osn 7500 product description

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