optix osn 3500 hardware system overview issue1.0

Optical Network Curriculum

Development Section

Optical Network Curriculum

Development Section

ISSUEISSUE

OTA105103 OptiX OSN 3500 Hardware System Overview OTA105103 OptiX OSN 3500 Hardware System Overview

1.01.0

Confidential Information of Huawei. No Spreading without Permission.

Security Level: Internal

2

ObjectivesObjectives

Grasp the structure of the

equipment

Grasp the main function of

every mentioned board.

Grasp the signal flow and the

alarms

Upon completion of this course,

you will be able to:



3

ContentsContents

Rack and Related Parts Sub-rack

Circuit Boards

Auxiliary Parts



4

Equipment OverviewEquipment Overview

Position of the OptiX OSN 3500 in transport network



5

RackRack

Can be installed on ETSI or 19

Inch Cabinet

Dimension of rack:

1. 2000mm(H)X600mm(W)X300mm(D)

(60 Kg) can contain 1 sub-rack

2. 2200mm(H)X600mm(W)X300mm(D)

(70.4 Kg) can contain 2 sub-racks

3. 2600mm(H)X600mm(W)X300mm(D)

(80 Kg) can contain 2 sub-racks



6

Power BoxPower Box

NEG2(-)

INPUT

RTN2(+)RTN1(+) NEG1(-)

SW3/20ASW1/20A SW2/20A SW4/20ASW1/20A SW3/20ASW2/20A SW4/20A

1. Grounding STUD 2. PGND 3. RTN1(+)

4. RTN2(+) 5. NEG1(-) 6. NEG2(-)

7. Input cable terminal 8. Left output cable terminal 9.Right output cable terminal



7

RackRack

Indicators on the cabinet

Indicator DescriptionStatus

On Off

Red indicator

Critical alarm

Critical alarm on one Sub-rack, which is accompanied by an audible alarm.

No Critical alarm on any Sub-rack.

Yellow indicator

Major alarm

Major alarm on one Sub-rack.

No Major alarm on any Sub-rack.

Orange indicator

Minor alarm

Minor alarm on one Sub-rack.

No Minor alarm on any Sub-rack.

Green indicator

Power The power supply is normal (-38.4 ~ -57.6V or -48.0V ~ -72.0 ).

Power supply is interrupted or abnormal.



8

ContentsContents

Rack and Related Parts

Sub-rack Circuit Boards

Auxiliary Parts



9

Sub-rackSub-rack

Service typeMaximum access ports

STM-64 4

STM-16 8

STM-4 46

STM-1 optical 92

STM-1 electrical 78

E4 service 32

E3/DS3 service 48

E1/T1 service 504

FE service 92

GE service 30



10

Sub-rackSub-rack

Size 496mm (W) X 295mm (D) X 730mm (H)

Weight 20kg



11

Sub-rackSub-rack

Fiber Routing

SLOT1

SLOT2

SLOT3

SLOT4

SLOT5

SLOT6

SLOT7

SLOT8

SLOT9

SLOT10

SLOT11

SLOT12

SLOT13

SLOT14

SLOT15

SLOT16

SLOT17

SLOT18

SLOT27

SLOT19

SLOT20

SLOT21

SLOT22

SLOT23

SLOT24

SLOT25

SLOT26

SLOT37

SLOT29

SLOT30

SLOT31

SLOT32

SLOT33

SLOT34

SLOT36

SLOT35

SLOT28

FAN FAN FAN

PIU

PIU

AUX

SCC

SCC

XCS

XCS

Slot Assignment & Relation

2 19, 203 21, 224 23, 245 25, 26

13 29, 3014 31, 3215 33, 3416 35, 36



12

Sub-rackSub-rack

Sub-rack slot access capacity

Configuration 1 40 G(35G +5G)

224X224 VC-496X96 VC-32016X2016 VC-12



13

Sub-rackSub-rack

Sub-rack slot access capacity

Configuration 2 60 G (80 G)(60G + 5G)

376X376 VC-496X96 VC-32016X2016 VC-12



14

Equipment ProtectionEquipment Protection

Items protected Protection scheme

E1/T1 processing board 1:N (N 8) TPS

E3/DS3 processing board 1:N (N 3) TPS (2 Groups)

E4/STM-1 processing board 1:N (N 3) TPS (2 Groups)

Cross-connect and timing unit 1+1 hot backup protection

SCC unit 1+1 hot backup protection

-48V power interface board 1+1 hot backup protection

3.3V board power supply1:N centralized hot backup protection

* The OptiX OSN 3500 can support three TPS groups of different types of services at the one time.



15

System OverviewSystem Overview

λ λEast

SDH interfaceunit (STM-1/4/

16/64)

SDH interfaceunit (STM-1/4/

16/64)

SDH cross-connect matrix andsynchronous timing unit (higher-order/

lower-order: 40G/5G and 60G/5G)

SCC unitand

overheadprocessing

unit

PDHinterfaceunit (E1/T1/E3/T3/E4)

Ethernetinterfaceunit (10/

100/1000M)

Auxiliaryinterface

unit

West



16

System OverviewSystem Overview

Cross-connect Unit

(High-order 376X376VC-4)

(Low-order 2016*2016 VC-12)

IU

IU

IU

IU

IU

IU

IU

IU

IU

IU

IU

IU

TimingUnit

Auxiliaryinterface unit

SCC and OHP unit

Interface Unit Interface Unit

ManagementinterfaceAuxiliary

interfaceExternal sychronization interface



17

ContentsContents


Sub-rack

Circuit Boards Auxiliary Parts



18

BoardBoard

Boards can be classified as:

Units

1. PDH 4. Cross Connect

2. SDH 5. SCC

3. Ethernet



19

BoardBoard

Limiting factors for inserting boards:

Access capability of slots

PDH boards can only be insert into some slots

Specific slots only for specific boards

Types of Boards:1. Processing2. Interface3. Processing + Interface



20

1. Processing board (for example: PQ1)

2. Interface board (for example: D75S)

3. Optical interface board (for example:SL16)

4. Optical interface board 5. Board of other types 6. Front panel

7. E1/T1 interface board 8. Optical interface

Appearance of boardsAppearance of boards



21

PDH UnitPDH Unit

Boards Processing Functions Interface

PQM 63 X E1/T1 2 X D75S, 2 X D12B, 2 X D12S

PQ1 63 X E1 2 X D75S, 2 X D12B, 2 X D12S

PL3 3 X E3 1 X C34S

PD3 6 X E3 1 X D34S

SPQ4 4 X E4/STM-1 1 X MU04

TSB8 8 Interface Switching & Bridging Board

TSB4 4 Interface Switching & Bridging Board



22

PDH Access UnitPDH Access Unit

Principle Diagram and Signal Flow

Alarms and Performance Events

Indicators

Relationship with Other Boards

Functions, Features and Applications

Course Contents



23


E1 PPI LPA LPT HPA

Signal Flow



24

ApplicationsApplications

Supports 63 both E1 and T1 signals

Provides 120 balanced E1

interface and 100 balanced T1

interface.

PQMPQM

PQ1PQ1

Supports 63 E1 signals

Provides 75 unbalanced interface

and 120 balanced interface.



25


Processing Interface

Slot Purpose Slot

1 Protection NN

2

Working

19, 20

3 21, 22

4 23, 24

5 25, 26

13 29,30

14 31, 32

15 33, 34

16 35, 36

Boards Slot Position

Processing: PQ1Interface: D12S

D12BD75S(DB44)

Processing: PQMInterface: D12S

D12B(DB44)



26

FunctionsFunctions

1

3

2 4

Servicepath

2M signal

Protectionpath

Normal

check out TU-AIS

1

3

2 4

Servicepath

2M signal

Protectionpath

Abnormal

Path Protection (PP)Sub-Network Connection Protection (SNCP)



27

FunctionsFunctions

SDH

PQ1

LUPQ1

LUSDH

¡É

loopback Test instrument

Maintenance Function(from NMS)Maintenance Function(from NMS)

Tributary software loopback

Online pseudo-random code check function



28

Major alarmsMajor alarms

T- ALOS: No E1 signal receivedReasons:Fault on E1 interface boardFault on the E1 CableFault on switch system

TU-AIS: Reasons:1. Incorrect cross-connect configuration 2. Fiber broken

TU-LOP: Reason:Incorrect service configuration

AlarmsAlarms



29

LP-RDI: Remote defect indicationReasons:Alarms such as TU-AIS and TU-LOP are detected by the remote terminal

LP-SLM , LP-TIM:Reasons: V5 or J2 mismatch

Minor alarmsMinor alarms

LP-REI: Remote error indicationReasons:Bit errors are detected by the remote terminal

AlarmsAlarms



30

IndicatorsIndicators

Indicator Color and status Description

Board hardware indicator-STAT

On, green The board works normally.

On, red Hardware failure.

On for 100ms and off for 100ms alternatively, red

Hardware mismatch.

Off The board is not powered on, or the service is not configured.

Service activation indicator-ACT

On, green The service is activated. (In TPS protection mode, the board is in working status.)

Off The service is not activated. (In TPS protection mode, the board is in protection status.)



31

IndicatorsIndicatorsIndicator Color and status Description

Board software indicator-PROG

On, green Upload of board software to FLASH or the FPGA upload is normal, or the board software initialization is normal.

On for 100ms and off for 100ms alternatively, green

Board software is being uploaded to FLASH or FGPA.


The board software is initializing, and is in BIOS boot stage.

On, red The board software in FLASH or the FPGA configuration is lost, resulting in upload and initialization failure.

Off No power supply.

Service alarm indicator-SRV

On, green Service is normal, no service alarm occurs.

On, red Critical or major alarm occurs to service.

On, yellow Minor or remote alarm occurs to service.

Off No service configured or no power supply.



32


Relationship with other boardsWith Cross connect board:

Receives/sends VC4 signal from/to cross connect boardReceives/sends clock signalfrom/to cross connect board

Communicates with SCC board via Lanswitch:

Reports its running information,Receives control command



33


PL3/PD3 (only difference with PQ1)

1. Provides 75 unbalanced interface

specified in ITU-T G.703 Recommendation.

2. P-LOS: Loss of tributary input signals



34



Slot Purpose Slot

2

Working

19

3 21

4 23

5 25

13 29

14 31

15 33

16 35


Processing: PL3Interface: C34S (SMB)

Processing: PD3Interface: D34S (SMB)



35


Processing: SPQ4Interface: MU04

(SMB)


Slot Purpose Slot

2

Working

19

3 21

4 23

5 25

13 29

14 31

15 33

16 35




36

SDH Access UnitSDH Access Unit

Boards Function

SL64 1 X STM-64

SL16 1 X STM-16

SLQ4 4 X STM-4

SLD4 2 X STM-4

SL4 1 X STM-4

SLQ1 4 X STM-1

SL1 1 X STM-1

SEP1 8 X STM-1 Processing

Interface Boards Function

EU08 8 X STM-1 Electrical

OU08 8 X STM-1 Optical

EU04 4 X STM-1 Electrical



37

SDH Access UnitSDH Access UnitBoards Slot PositionBoard 35G 60G

SL64 8/11 7/8/11/12

SL16 6~8, 11~13 5/6/7/8/11/12/13/14

SLQ4 6~8, 11~13 5/6/7/8/11/12/13/14

SLD4 6~8, 11~13 1~8, 11~17

SL4 1~8, 11~16 1~8, 11~17

SLQ1 1~8, 11~16 1~8, 11~17

SL1 1~8, 11~16 1~8, 11~17

SEP1 (Depending

on interface used)1~6, 13~16 or 2~5, 13~16

Interface

Board

Slot

EU08

(60G)19/21/

23/25/

29/31/

33/35

OU08

(60G)

EU04



38



Indicators


Functions, Features and

Applications


Course Contents



39


SPI RST MST MSP MSA HPT

Signal Flow



40


• Various optical modules for different distances

• J1 “Huawei SBS” C2 according to the service

• Software VC4 loopback




41


Critical AlarmsCritical Alarms


R-LOS:Loss of signalReasons:1. Light received is too dim2. Receiver is failed

R-LOF: Loss of frameReasons:1. Clock of the upstreamstation is failed2. To many bit errors



42


AU-AIS: Reason:Service is broken at VC4 level

MS-AIS: Reason:Caused by criticalalarm

AU-LOP:Reasons:1. Hardware failure2. Incorrect service configuration

Major AlarmsMajor Alarms



43


HP-TIM , HP-SLM: Reasons:J1 mismatchC2 mismatch

B1, B2, B3-EXC: Bit error excessReasons:1. Optical path problem2. Hardware failure

Minor AlarmsMinor Alarms



44


MS-RDI: Multiplex Section Remote End Defect IndicationReasons:Remote end detects MS-AIS

Minor AlarmsMinor AlarmsHP-RDI: High-order Path Remote EndDefect IndicationReasons:Remote end detects HP alarms

MS-REI: Multiplex Section Remote End Error IndicationReasons:Remote end detects B2 errors

HP-REI: High-order Path Remote End Error IndicationReasons:Remote end detects B3 errors



45


Performance event

Description of performance

B1-BBE B1 check bit error counts



AUPJCHIGH AU pointer positive justification counts

AUPJCLOW AU pointer negative justification counts

Performance EventsPerformance Events



46


Indicator status description




On, red The board hardware fails.


The board hardware is mismatched.

OffThe board is not powered on, or the service is not configured.


On, green The service is activated.

Off The service is not activated.



47

SDH Access UnitSDH Access UnitIndicator status description


Board software indicator-PROG

On, greenUpload of board software to FLASH or the FPGA upload is normal, or the board software initialization is normal.


Board software is being uploaded to FLASH or FGPA



On, redThe board software in FLASH or the FPGA configuration is lost, resulting in upload and initialization failure.









48


with SCC board

DCC and E1~E2Reports its running information,Receives control command

with XCS board

VC4 service signal

Relationship with other boardRelationship with other board



49




50




51

SDH Access UnitSDH Access UnitWith line boards in dual slot

Pass through D1~D3, E1~E2 (only when SCC unit is not functioning)Pass through K1, K2 (only when MSP exists)

8 – 117 – 126 – 135 – 14

4 – 153 – 162 – 17 (60 G)

SLOT1

SLOT2

SLOT3

SLOT4

SLOT5

SLOT6

SLOT7

SLOT8

SLOT9

SLOT10

SLOT11

SLOT12

SLOT13

SLOT14

SLOT15

SLOT16

SLOT17

SCC

Fiber Routing

SLOT18

SCC

FAN FAN FAN



52

Ethernet interface UnitEthernet interface Unit

Board FunctionSlot

35G 60G

EGS22 X Gigabit Ethernet

Optical Interface with Lanswitch

6~8, 11~13

5~8, 11~14

EFS44 X Fast Ethernet RJ-45

Interface with Lanswitch1~8, 11~16

1~8, 11~17

EFS0Fast Ethernet with

Lanswitch2~5, 13~16

Board Interface Slot

ETF8 19/21/23/25/29/31/

33/35



53


Function:

1. Provides 2 LC 1000BASE-SX/LX Ethernet optical

interfaces

2. Support bandwidth adjustment at granularity of 64kbit/s and

service mapping into VC-12 or VC-3 level

3. Supports LCAS

4. Supports the Ethernet Layer 2 switching, RSTP and point-

to-point and point-to-multipoint, MPLS, VPN



54


Function:

5. Supports VLAN and VLAN convergence

6. Supports Layer 2-based convergence and point-to-multipoint con

vergence

7. Supports the port-based and port + VLAN-based flow classificatio

n, and the priority setting and queue adjusting of flow

8. Supports IEEE802.3x-compliant flow control

9. Supports inloop and outloop

10. Provides abundant alarm and performance events



55

Ethernet interface UnitEthernet interface UnitFront panel and indicator description of EGS2








Off The board is not powered on, or the service is not configured.






56




Board software indicator- PROG










57









LINK 1, 2

On, green The GE port is connected with the opposite equipment, and the link is established.

Off The GE port is not connected with the opposite equipment, and the link is not available.

ACT 1, 2

On for 100ms and off for 100ms alternatively, orange

There are data exchanged between the GE port and opposite equipment.

Off There are no data exchanged between the GE port and opposite equipment.



58


The front panel of EFS0, EFS4 and ETF8



59

Ethernet interface UnitEthernet interface UnitIndicator Color and status Description

Board hardware indicator- STAT





OffThe board is not powered on, or the service is not configured.

Service activation indicator- ACT



Service alarm indicator- SRV







60

Ethernet interface UnitEthernet interface UnitIndicator description of EFS0, EFS4












61

Cross connection and clock board

Cross connection and clock board

We will discuss about the two parts of the board: Cross-connect unit and clock unit



Indicators


Functions, Features and Applications



62

Cross connectionand clock board

Cross connectionand clock board

Comparison between GXCS and EXCSA/B

Board nameGXCSA

(General XC A)EXCSA

(Enhanced XCA)EXCSB

(Enhanced XCB)

Higher order XC capacity

35G 58.75G 60G

Lower order XC capacity

5G 5G, can expand to 20G

Extended subrack capacity

0 1.25G

Configuration method of clock

Software configuration



63

Cross connection and clock Unit

Cross connection and clock Unit

Principle block diagram of GXCS/EXCS.

5Glower-order

cross-connectmatrix

35G or 60G4higher-order

cross-connectmatrix

Timingunit

Control andcommunication unit



64

Cross-connect UnitXC Unit

Cross-connect UnitXC Unit

Functions and FeaturesFunctions and Features


1. Cross-connection:

VC-12, VC-3 and VC-4

AU4-4C, AU4-8C, AU4-16C and AU4-64C

2. Network Protection Control:

SNCP at VC-3 & VC-12, MSP

3. Detects Tributary Board faults and Controls TPS

1+1 hot backup mode



65

Cross connectionand clock Unit


Critical alarmCritical alarm


TEMP-OVERReason:Operation temperatureover limit

PSReason:Multiplex section protection has been taking place

Major alarmMajor alarm



66



Relationship with other boardsRelationship with other boards

With SCCGets control commands

Sends running information

With access boardsGets/sends VC4 signals

Gets SNCP information



67



In master/slave mode,master NE uses external clock or internal clock, and slave NEs trace the master NE

Synchronization modes(of system)

A

B

C

BITS

Arrow shows the transmission directionof timing signals



68



Working modes of clock unit

NormalTiming signals is ok

HoldoverFrequency information

stored, holding for 24h

Free-runInternal clock

A

B

C

BITS

Arrow shows the transmission directionof timing signals



69

Cross-connect UnitClock Unit

Cross-connect UnitClock Unit

Functions and FeaturesFunctions and Features

1. System Internal Clock2. Traces 2 clock signal channels from external

timing signals3. Provides 2 clock signal channels to outside

systems4. Supports 2 synchronous clock signal input &

2 synchronous clock signal output of 2MHz or 2Mbit/s interfaces.

5. Processes SSM (S1) and Clock ID6. Controls TPS switch



70



Major alarmsMajor alarms


EXTSYNLOSReason:Loss of external synchronization source

LTIReason:Loss of all synchronization sources

S1-SYN-CHANGEReason:Synchronization source switches under S1 byte mode

Critical alarmCritical alarm



71

Cross connectionand Clock Unit

Cross connectionand Clock Unit



72



SYNC-LOSReasons:Loss of synchronization source of higher class

SYN-BADReasons:Deterioration of thesynchronization source

Minor alarmsMinor alarms



73



Indicator description of GXCS/EXCS







Off The board is not powered on.


On, green The active GXCS/EXCS is working.

Off The standby GXCS/EXCS is working.



74















Off No service is configured.

Synchronization clock indicator- SYNC

On, green The clock works in synchronous status.

On, red The clock works in hold-over or free-run mode.



75

SCC BoardSCC Board

Functions:Functions:

SEMF:

Manages local equipment

MCF:

1. Communicates with other

NEs by D1-D3

2. Communicates with NM

through OAM interface

System control Orderwire Inter-board communication System power monitoring Support 1+1 hot backup protection



76

SCC UnitSCC Unit

Slots available:

35 G Config Slots 17 & 1860 G Config Slots 17 (Opt) & 18

Interfaces related to SCC Board are on AUX Board



77

SCC BoardSCC Board

The principle block diagram of SCC



78

SCC BoardSCC Board

Software FunctionSoftware Function

BIOS

Host Software

Boots the system,

loads and upgrades host software

Self-checks the SCC hardware

DCC communication

Accomplishes real time

supervision, maintenance and

management



79


ID is the only identification for an NE

ID is configured in range of 1 ~ 49136 with software

The default value of ID is 0 x BFF0 (49136)

SCC BoardSCC Board



80

MDB (like RAM in PC)

In dynamic RAM

Automatically saves the current data

If power fails, the data in MDB will be lost

DRDB (like HD in PC)

Automatically saves the successfully verified data

Saves the data in flash RAM

The battery provides power

FDB0, FDB1 (like floppy disk in PC)

Manually saves the data

Enduringly saves data and does not need battery

SCC BoardSCC BoardFour databases on the SCC:

MDB

DRDB

issued data

verify

Boardrunning

FDB0FDB1

manual save

Installing

success

fail



81

SCC BoardSCC Board

Modem Connection Modem Connection

Modem

Modem

NE C

NE B

NE A

NE D

PSTN



82

SCC BoardSCC Board

NE D

NE A

NE B

NE C

DCN

ROUTER

NM Terminal ROUTER

WAN Connection



83

SCC BoardSCC Board

Name Description and reason Severity

NESTATE_INSTALL NE state install Critical

HARD_BAD Hardware fails Critical

POWER_FAIL Power failure Major

APS_MANUAL_STOP APS manual stop Minor

WRG_BD_TYPE Wrong inserted board type Minor

NE_SF_LOST It lacks a set of host software Warning

Alarm List



84

SCC BoardSCC Board

What information will be reported to SCC from an SDH board?

Why SCC board needs timing signals?

Relationship with other boardsRelationship with other boards



85

SCC BoardSCC BoardFront panel of SCC

Switch description on SCC

Switch name RESET ALMCUT

Function description

Reset buttonAlarm cut off Button



86

SCC UnitSCC Unit


Board hardware indicator - STAT





OffThe board is not powered on, or service is not configured.

Service activation - ACT

On, green Active status.

Off Standby status.

Indicator description SCC Board



87

SCC UnitSCC UnitIndicator Color and status Description

Board software indicator - PROG








Service Alarm - SRV

On, green Service is normal

On, red Critical or Major alarm on board

On, Yellow Minor or remote alarm on board

Off No Service on board



88

SCC UnitSCC Unit


Indicator for -48V power supply A - PWRA

On, green -48V power supply A is normal

On, red or off-48V power supply A is faulty (lost or fails)

Indicator for -48V power supply B – PWRB

On, green -48V power supply B is normal

On, red-48V power supply B is faulty (lost or fails)

Indicator for 3.3V power supply C – PWRC

On, green 3.3V Protection power is normal

On, red 3.3V Protection power is lost

Alarm cut indicator- ALMC

On, greenCurrently in permanent alarm cut-off status

OffAudible sound present for critical alarm

Indicator description of SCC board



89

ContentsContents


Sub-rack

Circuit Boards

Auxiliary Parts



90

Auxiliary partsAuxiliary parts

1. Auxiliary Interface Unit2. Power Interface Unit 3. Fan Unit4. Optical Amplifying Boards5. Dispersion Compensation Unit



91

Auxiliary Interface UnitAuxiliary Interface Unit

AUX BoardSlot available: 37

Functions: Back up Power Supply for boards Interfaces for:

1. 10M/100M Lanswitch (NMS)2. Orderwire3. Clock Input/Output



92

Auxiliary Interface UnitAuxiliary Interface UnitIndicator description AUX Board

Indicator Color Meaning

Board hardware indicator - STAT

On,

Green

+3.3V Power

Supply is normal.

On, Red +3.3V power

supply is abnormal

and the AUX board

is fed with the back

up power.

Off Both the +3.3V

working power and

backup power fail.

No power on

board.



93

Power Interface UnitPower Interface UnitPIU Power interface board, seated in Slot 27 and 28

Functions: Power access Lightening protection and filtering 2 X 50W power interfaces for some devices (Hub) 1+1 Hot Back up protection

PIU front panel



94

FAN UnitFAN Unit

Function and features: 3 Fans supporting hot swapping Automatically adjust fan speed Turns off fans at low Temp

Indicator Color Description

Operation status indicator-STAT

On, green

The fan operates normally.

On, redThe fan, fan power board or FAN is abnormal.

On, yellow

The fan is turned off due to low temperature.



95

Amplifying BoardsAmplifying Boards

Functions:

BA2 2 pairs LC type connector 2 Optical Power Amplifier output Transmit power amplification of +14 dBm or + 17dBm Transmission distance 120 ~ 130 Km

BA2: Optical Booster Amplifier



96


BPA: Optical Booster & Pre-amplifier

Functions:BPA 2 pairs LC type connector 1 Optical amplifier output 1 Optical pre-amplifier for reception Transmit power amplification of +14 dBm or + 17dBm Increase receiver sensitivity Support signal power gain of 22 ~ 25 dB



97


Tx BA Rx

Tx PA Rx

Amplifying boards positions in a networkCan be inserted in Slots 1 ~ 8, 11 ~ 17

TransmittingStation

ReceivingStation



98

Dispersion Compensation UnitDispersion Compensation Unit

DCU: Dispersion Compensation UnitFunctions: 2 pairs LC for 2 X 10Gbit/s signals dispersion compensator Used at receiving station when transmitted distance exceeds 80 km Inserted in Slots 1~8, 11~17

Tx BA RxPA DCU

1550.12 nm 1550.12 nm



99

SummarySummary


Sub-rack

Circuit Boards

Auxiliary Parts



100

optix osn 3500 hardware system overview issue1.0

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