metrolan manual

7/29/2019 Metrolan Manual

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DRAFT MANUAL

Metrodata Ltd

Fortune House

Crabtree Office Village

Eversley Way

EghamSurrey TW20 8RY

United Kingdom

tel: +44 (0) 1784 744700

fax:+44 (0) 1784 744730

email: [email protected] Part No: 76-02-059C

website: www.metrodata.co.uk

Metrodata MetroLAN User Manual

www.metrodata.co.uk

MetroLANUs

er

Ma

nual


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Metrodata Ltd

No part of this publication may be reproduced, transmitted, transcribed, stored in a retrievalsystem, or translated into any language or computer language, in any form or by any means,

electronic, mechanical, magnetic, optical, chemical, manual or otherwise, without the priorwritten permission of

DisclaimerMetrodata Ltd makes no representations or warranties with respect to the contents hereof

and specifically disclaims any implied warranties or merchantability or fitness for anyparticular purpose. Further, Metrodata Ltd reserves the right to revise this publication and tomake changes from time to time in the content hereof without obligation of Metrodata Ltd tonotify any person of such revision or changes.

TrademarksThe Trademarks of other Corporations which may be used in this manual are herebyacknowledged.

Copyright 2008 by Metrodata LtdAll Rights Reserved

Metrodata Ltd,

Fortune House,

Crabtree Office Village,

Eversley Way,

Egham, Surrey, TW20 8RY,

United Kingdom.

Tel: +44 (0) 1784 744700Fax: +44 (0) 1784 744730

e-mail: [email protected]

www: http://www.metrodata.co.uk

ftp://ftp.metrodata.co.uk


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1 INTRODUCTION 11. 1 About The MetroLAN 1

1. 2 Typical MetroLAN Installation 2

1. 3 About This Manual 3

1. 4 Conventions 3

2 STATUTORY INFORMATION 52. 1 Safety 5

2. 2 Electromagnetic Compatibility 52. 3 FCC Declaration 5

2. 4 Power Supply 5

2. 5 On board batteries 6

2. 6 Laser technology 6

2. 7 WEEE Directive 6

3 INTRODUCING THE MetroLAN 73. 1 Front Panel 7

3. 2 Rear panels 8

3. 3 Power Supply 9

3. 4 Remote Management port 10

3. 5 Alarm Extension 10

3. 6 Terminal Port 11

3 . 6. 1 Minimum RS232 connection 12

3 . 6. 2 V.24 Terminal Connector 9 Way to 9 Way 12

3 . 6. 3 V.24 Terminal Converter 9 Way to 25 Way 13

3. 7 E1/T1 Terminal Ports 14

3 . 7. 1 Balanced RJ45 E1/T1 Port Layout 14

3 . 7. 2 Connecting an E1/T1 port to a network device 15

3 . 7. 3 Connecting an E1/T1 port to a terminal device 15

3 . 7. 4 RJ45 Connector layout 17

3 . 7. 5 Cable lengths and types 17

3. 8 10/100 BaseT LAN ports 18

3 . 8. 1 LAN port layout 18

3 . 8. 2 E3/DS3 BNC Port layout 18

4 INSTALLING & SETTING-UP 194. 1 Connecting up 19

4. 2 Power-Up Sequence 20

4. 3 User Interface 20

4 . 3. 1 TTY terminal 21

4 . 3. 2 VT100/VT220 and ANSI terminals 22

4. 4 Default settings 23

5 SETTING-UP THE MetroLAN 255.1 Menu Structure 25

5.2 Mapping 27

5 .2.1 VC-4 275 .2.2 VC-3 27

5 .2.3 VC-12 27

5.3 Main Set-up Menu 29

5.4 Using the Wizard to configure the MetroLAN1000 30

5 . 4. 1 Select the number of LAN ports 30

5 . 4. 2 Select the number of E1/T1 ports 30

5 . 4. 3 Select E1/T1 interface type 31

5.5 Configuring the unit 31

5.6 Configuring the remote unit 31

5 . 6. 1 Get Config 31

5 . 6. 2 Put Config 31

5.7 Configuring MetroLAN units remotely 32

5 . 7. 1 Setting the Unit IP Address 325 . 7. 2 Setting a default Route 33

5.8 Alarm extension 34


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5 .8.1 Clear Alarm Outputs 34

5 .8.2 SDH port alarm menu 35

5 .8.3 VC 36

5 .8.4 LAN port alarms 37

5 .8.5 E1/T1 port alarms 38

5 .8.6 DS3/E3 port alarms (MetroLAN2000 only) 39

5.9 Data port set-up menus 40

5.10 V.24 set-up menu 405 .10.1 Terminal type 40

5 .10.2 Via Modem 40

5 .10.3 Baud rate 40

5 .10.4 Parity 40

5 .10.5 Data bits 41

5 .10.6 Stop bits 41

5 .10.7 Load new config 41

5.11 Management 42

5 .11.1 Management menu 42

5 .11.2 Telnet Option 43

5 .11. 3 TFTP 44

5 .11. 4 Ping 45

5.12 System menu 465 .12.1 Date 46

5 .12.2 Node name 47

5 .12.3 Password 47

5 .12.4 Software version 47

5 .12.5 Output config 47

5 .12.6 Input config 48

5 .12.7 Warm start 49

5 .12.8 Cold start (Caution!) 49

5 .12.9 Event Logs 50

5.13 Testing menu 51

5.14 Performance data 51

6 QUICK START METROLAN1000 USING THE WIZARD 536.1 Using the Wizard. 54

6 .1. 1 Select the number of LAN ports 54

6 .1. 2 Select the number of E1/T1 ports 54

6 .1. 3 Select E1/T1 interface type 54

6 .1. 4 Configuring the unit 54

6.2 Configuring units remotely 55

6 . 2. 1 Get Config 55

6 . 2. 2 Put Config 55

6.3 Configuring MetroLAN units from a remote location 56

6 . 3. 1 Setting the Unit IP Address 56

6 .3. 2 Setting a default Route 57

7 ADVANCED DATA PORT SET-UP MENUS 597.1 SDH port set-up 61

7 .1. 1 Type of fibre 62

7 .1. 2 Timing 62

7 .1. 3 C1/J0 selection 62

7 .1. 4 J0 transmit/J0 expected & receiving 62

7 .1. 5 E1 value 62

7 .1. 6 Degrade detection threshold (sD thresholds) 63

7 .1. 7 Payload 63

7 .1. 8 Path signal label 64

7 .1. 9 J1 transmit/ J1 expected & receiving 64

7 .1. 10 RDI type 65

7 .1. 11 Unused tribs sent 657 .1. 12 Counters 65

7.2 LAN port set-up 66


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7 .2. 1 State 66

7 .2. 2 Auto-negotiation 67

7 .2. 3 Flow control 67

7 .2. 4 MDI/MDIX 68

7 .2. 5 MAC address 68

7 .2. 6 FCS generation 68

7 .2. 7 Max frame size 68

7 .2. 8 GFP payload fcs 687 .2. 9 Allocation 69

7 .2. 10 LCAS 69

7 .2. 11 Max differential delay 69

7 .2. 12 RDI type 69

7 .2. 13 J2 transmit & J2 expected 70

7 .2. 14 List allocation 70

7 .2. 15 LCAS status 71

7 .2. 16 Counters 71

7.3 E1 / T1 PORT 73

7 .3. 1 State 73

7 .3. 2 Interface 73

7 .3. 3 Rx sensitivity 73

7 .3. 4 Allocation 737 .3. 5 RDI type 74



7 .3. 8 Counters 75

7.4 E3 / DS-3 PORT (MetroLAN2000 only) 76

7 .4. 1 State 76

7 .4. 2 Interface 76

7 .4. 3 Allocation 76

7 .4. 4 RDI type 76



7 .4. 7 Counters 77

8 ANALYSING PERFORMANCE 798. 1 Introduction 79

8. 2 Errors and Alarms 79

8 . 2. 1 SDH port errors & alarms 79

8 . 2. 2 VC errors & alarms 80

8 . 2. 3 E1/T1 errors & alarms 80

8 . 2. 4 Error and Alarm definitions 81

8. 3 Performance menu 82

8 . 3. 1 Interface 82

8 . 3. 2 Display mode 82

8 . 3. 3 Summary style 82

8 . 3. 4 Physical layer stats 828 . 3. 5 Error type 83

8. 4 Physical layer stats Reports 83

8 . 4. 1 Full Report 83

8 . 4. 2 Rolling report 84

8. 5 Physical layer stats - Summaries 85

8 . 5. 1 Screen presentation 85

8 . 5. 2 Presentation display modes 85

8 . 5. 3 Summary style 86

8 . 5. 4 Summary display - COUNTS style 86

8 . 5. 5 Summary display - G.821 style 87

8 . 5. 6 Summary display - Percent G.821 style 88#


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9 TEST & TROUBLESHOOTING 899. 1 Testing Menu 89

9. 2 Local Loop Tests 90

9 MetroLAN REMOTE MANAGEMENT 919.1 Management menu 91

9 .1. 1 Telnet Option 92

9 .1. 2 TFTP 93

9 .1. 3 Ping 93


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INTRODUCTION

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1 INTRODUCTION

1. 1 About The MetroLAN

The Metrodata MetroLAN offers the capability of extending multiple LAN segments acrossan SDH network. Initially two model variants are offered. These are MetroLAN-1000 offering

LAN + E1/T1 transport; and MetroLAN-2000 with additional E3/DS-3 transport.

The MetroLAN presents LAN ports as fully auto-sensing 10/100BaseT interfaces withmanual override, thereby supporting any LAN network infrastructure. The MetroLAN offers8 independent LAN interfaces, each of which may be transported to a remote location viathe SDH infrastructure.

Generic Framing Procedure (GFP) encapsulation along with virtual concatenation withVC-4/VC-3 or VC-12 granularity and LCAS support offers maximum benefit to both serviceproviders and users in terms of flexibility and bandwidth optimisation. The MetroLANsupports 8 independent GFP sessions, each of which may be directed to separate remote

destinations.

The MetroLAN supports IEEE 802.3x flow control on all 10/100 ports to prevent traffic losswhen reduced bandwidth is available. Full wire speed forwarding on any GFP sessionrequires 50 VC-12 tributaries. The remaining bandwidth is available to other GFP sessionsenabling the full 155Mbps SDH bandwidth to be utilised.

The MetroLAN supports large frames of up to 4096 bytes and is protocol and payloadtransparent. The MetroLAN will pass VLAN tagged frames, including Q in Q double taggedframes and CISCO ISL, transparently end to end. To further optimise network utilisation theMetroLAN offers 8 E1/T1 G.703 clear channel ports. Each E1/T1 may be mapped into anindividual VC-12 for mapping into the remaining SDH payload.


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INTRODUCTION

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1. 2 Typical MetroLAN Installation

Figure 1.1 MetroLAN typical deployment

SDH Network

PBX

SWITCH

PBX

SWITCH

PBXSWITCH

HEAD OFFICE

100 Mbps20 Mbps

STM-1

STM-1

STM-1

BRANCH

OFFICE BRANCHOFFICE

E1

E1

E110/100 BaseT

10/100 BaseT

10/100 BaseT


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INTRODUCTION

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1. 3 About This Manual

This user manual describes the installation, commissioning and operation of the MetrodataMetroLAN SDH Access Multiplexer. It describes the operational functions of the unit, as wellas the extensive performance monitoring facilities.

It is important that you read and understand the performance and operating limitations inSection 2 before attempting any connections. Also, familiarise yourself with each of theconnectors at the rear of the unit, which are described in Section 3.

Section 3 describes the front and rear panels of the MetroLAN with details of connectors,connector layouts and alarm lights. It is worthwhile to study the detail of Sections 3 and 4since this helps in installing and testing the unit.

Section 4, Installing & Setting-up, takes you through the basic steps of connecting theMetroLAN to the external devices that you may have.

The MetroLAN set-up menus are described in Section 5, Configuring the MetroLAN, andSection 6, Dataport set-up.

Section 7, Analysing Performance, shows you how to monitor the link and change thesummary report options for the MetroLAN.

The diagnostic testing and troubleshooting functions of the MetroLAN are described inSection 8, including testing both local and remote connections.

1. 4 Conventions

Notes are used to provide the reader with either statutory information which must beobserved for safety reasons, or additional information which may increase the MetroLAN'seffectiveness.

A pair of arrows around a word indicates a key on the keyboard, such as

or

There are two exceptions to this, which appear on some of the menus:

indicates that selecting the option will lead to data being displayed on the screen.

indicates that the option leads to another menu, from which further options may bechosen.

Screen displays that contain variable information, such as the current date or time, show thevariable in italics, surrounded by square brackets, i.e. [time], or [nodename]. Thespeechmarks indicate that the field contents can be specified by the user.

Where menu itemsare referred to in the text, these are shown in italics to help the reader tocross relate to menu information.


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INTRODUCTION

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Screen examples: the MetroLAN allows you to use one of three options for displaying themenus on a terminal - ANSI, VT100/VT220 or TTY.

The screen examples in this manual use VT100/VT220 and are shaded to allow easyidentification by the reader.


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STATUTORY INFORMATION

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2 STATUTORY INFORMATION

2. 1 Safety

The following ports are designated SELV (Safety Extra Low Voltage) within the scope ofEN41003:

E1/T1 portsE3/DS-3 portsLAN portsTerminal portManagement portAlarm extension port

These ports should only be connected to SELV ports on other equipment in accordance withEN60950 clause 2.3.

2. 2 Electromagnetic Compatibility

In order to ensure EMC compliance all signal and data cables and connectors must use ascreened connector shell with a screened cable. The cable screen must be terminated to thescreened connector shell and not connected to any pins of the connector. Failure to use thecorrect connector may compromise EMC compliance.

2. 3 FCC Declaration

This equipment has been tested and found to comply with the limits for a Class A digitaldevice, pursuant to Part 15 of the FCC Rules. These limits are designed to providereasonable protection against harmful interference when the equipment is operated in acommercial environment. This equipment generates, uses, and can radiate radio frequency

energy and, if not installed and used in accordance with the instruction manual, may causeharmful interference to radio communications. Operation of this equipment in a residentialarea is likely to cause harmful interference in which case the user will be required to correctthe interference at its own expense.

2. 4 Power Supply

The MetroLAN is powered by a mains power supply with an input voltage range 100-250VAC / 50-400 Hz. The maximum operating input current is 400mA rms at 100VAC.

An alternative -48V DC power supply is available. The maximum input current is 1000mA.

Section 3.2 provides more detail on power supplies.

Safety Notes:Excessive voltages are present inside the unit. There are no user serviceable parts insidethe unit, and the cover should not be removed by unqualified personnel. The unit must notbe exposed to damp or condensing conditions. The MetroLAN must be connected to safetyearth for correct operation.


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2. 5 On board batteries

The user is reminded that Metrodata motherboards use Lithium/Thionyl Chloride 3.6 voltbattery cells for the maintenance of RAM. These batteries must be handled with care. Theremay be a risk of explosion if a battery is incorrectly replaced. Do not recharge, force open,heat or dispose of by fire. Replace only with the same type of battery.

Disposal must be in accordance with the manufacturers instructions. If in doubt about anyaspect of battery replacement or disposal, please call Metrodata Technical SupportDepartment.

2. 6 Laser technology

The user is reminded that the MetroLAN employs laser technology. Care must be taken notto expose the eyes to laser beams or radiation since eye tissue damage can result. The rearpanels of all models using laser technology are marked with a label as shown below:

Figure 2.1 Laser warning label

2. 7 WEEE DirectiveThe MetroLAN unit is covered by Directive 2002/96/EC (OJ:L37/24/2003) on waste electricaland electronic equipment (The WEEE Directive). MetroLAN units must therefore not bedisposed of in a standard landfill.


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INTRODUCING THE MetroLAN

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3 INTRODUCING THE METROLAN

3. 1 Front Panel

The front panel of the MetroLAN is shown in schematic form below.

Figure 3.1 MetroLAN front panel

The MetroLAN provides you with essential information through a series of LEDs on the frontpanel. The colour of some of these LEDs will depend on the type of data that is being handledat the time, and these are described in Figure 3.2 below. Note that the LINE port label refersto the SDH port, whilst a Tributary fault may relate to any E1/T1 line, E3/DS-3 line, LAN or aVC fault.

Figure 3.2 Front panel alarms

LED Colour Meaning

Power Red Power is being received.

Line SDH

Line Major Red LOS, LOF, LOC, SD or OOF alarm is present

Line Minor Yellow AIS, FERF or TIM alarm is present.

TributaryFault

Fault Red LOS (Major) or AIS (MInor) fault on any E1/T1 lineLKDN (Link Down) fault on any LAN portVC fault

Test

Red Local loop test in progress on SDH or any E1/T1 orE3/DS3 port

Unlit No test in progress

POWERTRIBUTARYFAULT

TESTLINE

MAJORLINEMINOR


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3. 2 Rear panels

The MetroLAN is supplied in a metal enclosure for tabletop or 19 rack mounting using theoptional rack mounting ears that bolt onto the side of the module.The MetroLAN 1000 unit is1U high, whilst the MetroLAN 2000 which has the additional E3/DS-3 interfaces, is 1.5U high.The layout of the rear panels with their connections is shown in the figures below.

Figure 3.3 MetroLAN 1000 rear panel

Figure 3.4 MetroLAN 2000 rear panel

ALARM EXT

TERMINAL

100 -250VAC/50-400Hzwww.metrodata.co.uk

Tx Rx

NetworkSTM-1/OC3

HAZARD WARNING!DO NOT OPEN WITHPOWER CONNECTED

P2

P1

P4

P3

P6 P8

P5 P7

C R T LO X X II NL K

M ANPORT

10/100BaseT

P1 P2 P3 P4 P5 P6 P7 P8

E1

METROLANMetrodata Ltd

10/100BaseT

P1 P2 P3 P4 P5 P6 P7 P8

100 -250VAC/50-400Hz ALARM EXT

TERMINAL

www.metrodata.co.uk

Tx Rx

NetworkSTM-1/OC3


P2

P1

P4

P3

P6 P8

P5 P7

www.metrodata.co.uk

Rx TxRx Tx

PORT 3 PORT 2

Rx Tx

PORT 1METROLAN 2000

Metrodata Ltd (METROLAN)


M ANPORT

E1

B D F H

A C E G


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3. 3 Power Supply

The MetroLAN is powered by a mains supply with an input voltage of 100-250VAC 50-400Hzand with a maximum input current of 400 mA at 100VAC. Mains power is connected via theIEC inlet on the rear of the unit.

An alternative -48VDC powered unit is available. The input voltage and current ranges are -minus 36 to 72 volts DC, 1000 - 500mA. A Buccaneer type socket is fitted to the rear panel,and a plug is provided with the unit for the customers own wiring. The connections arelabelled on the rear panel of the MetroLAN.

Figure 3.5 -48VDC connections

On some units, an additional Ground stud may be located on the rear panel to permit aseparate Ground connection to be made.

Figure 3.6 DC Supply socket

Note: The MetroLAN must be connected to mains safety earth for correct operation.

Pin no Connection

1 -48VDC

2 Ground

3 0VDC

Pin1-48V

Pin30V

L__


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3. 4 Remote Management port

This port is labelled MAN PORTon the rear panel. The LM1100 SNMP Enabler option givesaccess to the SNMP network management system via an IEEE 802.3/10BaseT interface onthe rear of the unit. The layout of this ports RJ45 connector is shown below:Note: The Management port is regarded as a SELV port within the scope of EN 41003.

Figure 3.7 Management port layout

3. 5 Alarm Extension

This port contains a 9-pin D-type connector, allowing you to connect the major and minoralarm relay contacts within the MetroLAN to a remote indicator, such as a bell or a lamp. Thetwo types of connectors are described below. The Major alarm relay is energised for normaloperation, so that major alarm indication is given if the mains power supply to the MetroLANshould fail. The Alarm Relay port is regarded as a SELV port within the scope of EN41003.

Figure 3.8 9-pin D-type connector layout

Pin Signal

1 Tx Data + ve

2 Tx Data - ve

3 Rx Data + ve

4 Not connected

5 Not connected

6 Rx Data - ve

7 Not connected

8 Not connected

Pin Function

1 Shield

2 Major common

3 Minor N/O

4 Minor N/C

5 Not connected

6 Major N/C

7 Major N/O

8 Minor common

9 Not connected


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3. 6 Terminal Port

The terminal port is provided for local management of the MetroLAN. It is a female 9-pin D-type connector with a full RS232 layout which is shown below.

Note: The Terminal port is regarded as a SELV port within the scope of EN 41003.

Figure 3.9 Terminal port connector layout

Note:If the menu item VIA MODEMin the V.24 SET-UPmenu is set to its default value YES, thenRTS (pin 7 on the MetroLAN terminal port) needs to be correctly driven, otherwise the userwill be permanently logged out of the unit. To drive the RTS correctly, a fully configured cablecan be used together with a terminal that supports hardware handshaking. An alternativeapproach is to connect the RTS and DSR signals together (pins 6 and 7) at the MetroLAN endof the cable.

Pin Function

1 DCD

2 Transmit

3 Receive

4 Not connected

5 Ground

6 DSR

7 RTS

8 CTS

9 Not Connected


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3 . 6. 1 Minimum RS232 connection

A cable to connect a local terminal to this port (without a modem) may have the minimumRS232 connection when this is suitable for the terminal being used, as shown below.

Figure 3.10 Local terminal cable pinout

3 . 6. 2 V.24 Terminal Connector 9 Way to 9 Way

A connector cable can be used to connect from the 9-way female D-type connector on therear panel of the MetroLAN to the 9-way D-type connector of a PC compatible COM port. This

may be required if a PC is being used as the management terminal. The connections are:

Figure 3.11 Terminal port connector cable 9 way to 9 way

Note: To inhibit the modem control function, loop pins 6 and 7 at MetroLAN end of cable, anddo not connect PC pin 7, RTS.

9-Way Male

(MetroLAN)

Function 25 Way D Female 9 way D

Female

1 Not connected

3 Transmit 2 3

2 Receive 3 2

4 Not connected

5 Ground 7 5

6 Loop to 7

7 Loop to 6

8 Not connected

9 9-25 Not connected

9 Way D Male(MetroLAN)

Function 9 Way DFemale (PC)

1 DCD 1

2 Receive 2

3 Transmit 3

4 Not connected 4

5 Ground 5

6 DSR 6

7 RTS 7

8 CTS 8

9 Not connected 9


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3 . 6. 3 V.24 Terminal Converter 9 Way to 25 Way

A converter cable can be used to convert from the 9-way female outlet on the MetroLAN to a25-way female D-type connector such as is used for many dumb terminals.

Figure 3.12 9 way to 25 way converter cable

Note: To inhibit the modem control function, loop pins 6 and 7 at MetroLAN end of cable, anddo not connect PC pin 4, RTS

9 Way D Male

(MetroLAN)

Function 25 Way D

Female

1 DCD 8

2 Receive 3

3 Transmit 2

4 Not connected

5 Ground 7

6 DSR 6

7 RTS 4

8 CTS 5

9 Not connected 1, 9-25


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3. 7 E1/T1 Terminal Ports

There are 8 RJ45 based E1/T1 ports arranged in an array on the rear panel of the MetroLAN.The schematic below shows both types of metroLAN rear panels.

Figure 3.13 MetroLAN rear panels

The ports are shown as the array on the right hand side of the MetroLAN rear panel. Theyhave a DCE interface, as described in detail below.

3 . 7. 1 Balanced RJ45 E1/T1 Port Layout

The layout of each of the female RJ45 E1/T1 ports mounted on the rear panel is shown below:

Figure 3.14 E1/T1 port layout

In earlier models the E/T1 ports may not be identified on the rear panel silk screening as givenin the figure above. The numeric and alpha port descriptions are given in the table below.

Figure 3.15 E1/T1 ports by number and by port letter

RJ45 Pin No 1 2 3 4 5 6 7 8

Function Rx tip Rx ring Rxshield

Tx tip Tx ring Txshield

N/C N/C

2 4 6 8 equals B D F H

1 3 5 7 equals A C E G

ALARM EXT

TERMINAL


Tx Rx

NetworkSTM-1/OC3


P2

P1

P4

P3

P6 P8

P5 P7


M ANPORT

10/100BaseT

P1 P2 P3 P4 P5 P6 P7 P8

E1


10/100BaseT

P1 P2 P3 P4 P5 P6 P7 P8


TERMINAL

www.metrodata.co.uk

Tx Rx

NetworkSTM-1/OC3


P2

P1

P4

P3

P6 P8

P5 P7

www.metrodata.co.uk

Rx TxRx Tx

PORT 3 PORT 2

Rx Tx

PORT 1METROLAN 2000



M ANPORT

E1

B D F H

A C E G


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3 . 7. 2 Connecting an E1/T1 port to a network device

The MetroLAN E1/T1 interface outlet presents a TE (Terminal Equipment) type interface.Connecting cables from the MetroLAN port to a network port such as an E1 leased line or anNTU are straight through.

Figure 3.16 Connection from MetroLAN (TE) to network device

3 . 7. 3 Connecting an E1/T1 port to a terminal device

Connection to a terminal equipment port such as a router or PABX requires a crossover cableas shown below. Dongle cables are provided with the MetroLAN product for each E1/T1 port.

Figure 3.17 Connection from MetroLAN to a terminal device

MetroLANport pin

MetroLAN E1/T1port function (TE)

Network portpin

Network portfunction (NE)

1 Rx tip 1 Tx tip

2 Rx ring 2 Tx ring

3 Rx shield 3 Tx shield

4 Tx tip 4 Rx tip

5 Tx ring 5 Rx ring

6 Tx shield 6 Rx shield

7 Not connected Not connected Not connected


MetroLANport pin

MetroLAN E1/T1port function (TE)

Terminal portpin

Terminal portfunction (NE)

1 Rx tip 4 Tx tip

2 Rx ring 5 Tx ring

3 Rx shield 6 Tx shield

4 Tx tip 1 Rx tip

5 Tx ring 2 Rx ring

6 Tx shield 3 Rx shield




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The dongle crossover cable is shown in the schematic below. When the MetroLAN product isto be connected to a TE device such as a router or a PABX then a crossover cable isnecessary The MetroLAN is supplied with one crossover cable for each E1/T1 interface. Thepart number is 80-40-002.

Figure 3.18 RJ45 E1 Dongle

Figure 3.19 TE and NT connections to MetroLANThis use of dongle may not apply in the same way to Metrodata products other thanMetroLAN, so the user should check the use of the dongle for each product individually.

Male RJ45Female RJ45

ALARM EXT

TERMINAL


Tx Rx

NetworkSTM-1/OC3


P2

P1

P4

P3

P6 P8

P5 P7


M ANPORT 10/100BaseT

P1 P2 P3 P4 P5 P6 P7 P8

E1

B D F H

A C E G

Straight cable to NT deviceStraight cable to TE devicee.g. PABX or router

Crossover dongle


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3 . 7. 4 RJ45 Connector layout

Figure 2.4 shows both the plug and socket head on so that any connecting wires are behindthe connector. The connector numbering is shown.

Figure 3.20 RJ45 layout

3 . 7. 5 Cable lengths and types

Cable lengths should be restricted to those defined below:

Figure 3.21 Cable lengthsNote: The total maximum attenuation of the cable attached to the network port must notexceed 6dB when measured at 1024 MHz. The frequency/attenuation characteristic of thecables attached to the network port shall follow a root frequency law. This port type isapproved to CTR12, CTR13.

Cable Max Length(metres)

Belden 8132 (28 AWG) 175

Belden 9841 (24 AWG) 300

1 2 3 4 5 6 78

8 7 6 5 4 3 2 1

LOCKING TAB


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3. 8 10/100 BaseT LAN ports

There are 8 RJ45 based 10/100 BaseT LAN ports arranged in an array on the rear panel ofthe MetroLAN.The schematic below shows the rear panels of both types of metroLAN.

Figure 3.22 MetroLAN rear panels

The 10/100 BaseT LAN ports are the left hand array as shown on the schematics above. Theupper array has green indicator LEDs (one for each port). The LEDs show green when theport is active.The LED and port numbering is shown in the table below. This is also engravedin a table on the rear panel.

Figure 3.23 LAN port indicator LEDs & port numbers

3 . 8. 1 LAN port layout

Each of the ports in the array has the layout shown below, but will auto select MDI/MDIXconfiguration.

Figure 3.24 RJ45 LAN port layout

3 . 8. 2 E3/DS3 BNC Port layout

In earlier models the E3/DS-3 ports may not be identified on the rear panel silk screening asgiven in the figure above. The numeric and alpha port descriptions are given below.:

Figure 3.25 E3/DS-3 Port by number & letter

Port indicator LED P1 P2 P3 P4 P5 P6 P7 P8

Upper ports P2 P4 P6 P8

Lower ports P1 P3 P5 P7

RJ45 Pin No 1 2 3 4 5 6 7 8

Function Rx + Rx - Tx + Tx -

1 2 3 equals J K L

ALARM EXT

TERMINAL


Tx Rx

Network

STM-1/OC3


P2

P1

P4

P3

P6 P8

P5 P7


M ANPORT

10/100BaseT

P1 P2 P3 P4 P5 P6 P7 P8

E1


10/100BaseT

P1 P2 P3 P4 P5 P6 P7 P8


TERMINAL

www.metrodata.co.uk

Tx Rx

Network

STM-1/OC3


P2

P1

P4

P3

P6 P8

P5 P7

www.metrodata.co.uk

Rx TxRx Tx

PORT 3 PORT 2

Rx Tx

PORT 1METROLAN 2000



M ANPORT

E1

B D F H

A C E G


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INSTALLING & SETTING-UP

19 76-02-059C

4 INSTALLING & SETTING-UP

This chapter describes how to set up the MetroLAN ready for use. It covers the initialconnections, powering on the unit, and how to access the software that controls theoperating parameters. Note that MetroLAN units must be used at each location on the SDHnetwork.

Safety Notice: Ports that are identified as SELV in this manual should only be connected toSELV ports on other equipment in accordance with EN 60950 clause 2.3.

4. 1 Connecting up

Step 1: MountingThe MetroLAN is housed in a convenient 1U or 1.5U table top enclosure. The unit may alsobe installed in a 19" rack using the rack mounting brackets supplied.

Step 2: SDH NetworkConnect each of the MetroLAN units to the SDH Network, using the dual connector locatedon the rear panel of each unit. Ensure that the correct fibre type is used, otherwise unreliableoperation may occur.Step 3: LAN connectionsConnect the LAN or LANs at each site to the LAN ports using the RJ45 connector ports P1-P8 on the rear panel of the unit.

Step 4: E1/T1 connectionsConnect the E1/T1 lines to the E1/T1 ports A - H in the E1/T1 RJ45 socket matrix on the rearpanel.

Step 4: E3/DS-3 connections

Connect the E3/DS-3 lines to the ports J, K, L (1, 2, 3) on the MetroLAN rear panel.

Step 5: TerminalConnect the management terminal (Teletype or VT100/220 or PC) using the 9-way D- typeconnector labelled TERMINAL on the rear panel of the unit.

Step 6: Alarm ExtensionIf you wish to use an external alarm device, connect this to the rear panel port labelledALARM EXT.

Step 7: SNMP Management Port

If you have the LM1100 SNMP Enabler option and wish to use it, connect the LAN to the portlabelled MAN PORT using an RJ45 connector.

Step 8: Power SupplyFinally, connect the mains power lead (or DC power cable) and re-check all connections forsecurity. See section 2.4 for connection details for the optional -48V DC power supply. Turnon the terminal and external alarm device if used, then turn on the power supply.

Warning: Do not connect the MetroLAN to excessive voltages. Read the safety informationbefore continuing.

Step 9: Open menu systemWhen the unit has powered up, type the password using the management terminal.


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76-02-059C 20

4. 2 Power-Up Sequence

When the MetroLAN is powered up, it performs several system tests. After a few secondsthe start-up screen is shown on the terminal. Figure 4.1 below is an example only:

Figure 4.1 Start-up screens

In order to check or change any of the operating parameters, you will first need to gainaccess to the MetroLAN's software by logging in. Press any key, and a logon message willbe displayed:

Figure 4.2 Logon screen

There are two levels of user - Observer, or Operator. If you type VIEWas the password, youwill only be able to look at the current settings, and will not be able to change any of them. Ifyou enter the correct operator password, you can change any parameters that are notdefined as read-only.

The default operator password is the same as the model number, i.e. MetroLAN. When youhave entered this once, you will be able to change the password if you wish, as described inSection 5.8. When you enter the appropriate password, you will be presented with the MAINSET-UPmenu. All of the MetroLAN's operating parameters are accessed through this initialmenu.

4. 3 User Interface

The display of the menu, and the way you select menu options, will depend on which typeof terminal you have connected to the unit, and which version of MetroLAN firmware youhave. This section describes the differences between the three main types of display - howto change the display set-up is described at the end of this section.

Metrodata Limited

MetroLAN Sonet/SDH Access Multiplexer

Metrodata Limited

MetroLAN

Software version 5.0.694 23/3/05Wide Area Network Kernel 1993 Martin Harvey

Real-time clock okaytime now: [time, date]Cold-start requested from consoleCold-startingConfiguration data set to defaultsPerformance log cleared

Software version 5.0.694 23/3/05Wide Area Network Kernel 1993 Martin Harvey

Real-time clock okaylast used: [time, date]time now: [time, date]Warm-starting

Cold start Warm start

Metrodata MetroLAN: Local connection to "[nodename]"password ('view' to view only):


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4 . 3. 1 TTY terminal

With a TTY terminal, options are selected by pressing the first capital letter in the name.Generally, this will be the first letter, but where two menu options start with the same letterone of them will have another letter capitalised. An example of a TTY display (the default) isshown below:

Figure 4.3 TTY Main set-up menu

When you press a letter which leads to a further menu, the screen will scroll up and the newmenu will be displayed. The item MANAGEMENT only appears if the LM1100 SNMPEnabler has been fitted to the MetroLAN.

Pressing a letter corresponding to a menu option will lead to additional prompts at the bottomof the screen:

Figure 4.4 Prompt screen

The current value of that option will then be shown. Each time you press the space bar, thenext value will be displayed, cycling through the available values. When the required valueis displayed, simply press the key to accept the value or press to cancelyour choice. This process is known as toggling.

MAIN SET-UP

Global status

alarm eXtension

Data port set-up

V.24 set-up

Management

System

Testing

Performance data

Select item by using first CAPITALletter of name

- exit menu

- change value - save new value - exit without saving


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4 . 3. 2 VT100/VT220 and ANSI terminals

The displays you see on a VT100/VT220 or an ANSI terminal are very similar, and examplesare shown below:

Figure 4.5 VT/ANSI Main set-up menu

When you press a letter which leads to a further menu, the screen will be refreshed withoutscrolling, displaying the new menu.

If you press a letter corresponding to a menu option, the value opposite that option will behighlighted. You will also see the prompts at the bottom of the screen, similar to the TTYdisplay:

Figure 4.6 Prompt screen

Pressing the space bar will cause the next available value to be displayed opposite theoption. When the required value is displayed, simply press the key to accept thevalue or press to leave the existing value unchanged.This process is known astoggling.

Note that if you use a PC with the Windows Hyperterm terminal emulator set to VT100/220,click on View/Fontand activate MS Linedrawto achieve best picture quality.

MAIN SET-UP

Global status

alarm eXtension

Data port set-up

V.24 set-up

Management

System

Testing Performance data

HIGHLIGHTED letter - select item

- exit menu

- change value - save new value - exit without saving


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4. 4 Default settings

The default settings for the terminal connected to the management port are given in the tablebelow.

The terminal must be set to the MetroLAN default values after performing a cold start. Once

this is done, the MetroLAN V.24 settings can be changed using the V.24 SET-UPmenu,which is accessed from the MAIN SET-UPmenu described in the next section.

The default terminal is a Teletype (TTY), but the vast majority of users will employ a VT100/220or anANSIterminal either directly or on a PC via a terminal emulator. The TTY outputscreens do not have graphic capability, and are therefore not so easy to read when settingup the system.

After a making changes in the MetroLANs stored terminal set-up (with the terminal ondefault settings), select LOAD NEW CONFIG on the menu screen. The physical terminalmust then be re-set to correspond to the new values stored in the unit.

Figure 4.7 V.24 Terminal set-up defaults and options

V.24 Item Defaults Options

Terminal type TTY TTY, VT100/220, ANSI

Via Modem No Yes, No

Baud rate 19200 2400, 4800, 9600, 19200

Parity None Odd, Even

Data bits 8 7 or 8

Stop bits 2 1 or 2


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SETTING-UP THE MetroLAN

25 76-02-059C

5 SETTING-UP THE METROLAN

5.1 Menu Structure

When you have completed the installation, and have successfully logged in, you will bepresented with the MAIN SET-UP menu. In order to view or change a parameter, you need

to know which menus or options to display. This section describes how to navigate your waythrough the menus.

Figure 5.1 MetroLAN1000 menu structure

Global status Display

alarm e tensionX Clear alarm outputs

SDH port

VCLAN portE1/T1 port

Data port set-up

E1/T1 port [A-H]StateInterfaceRx sensitivityAllocationRDI typeJ2 transmitj2 eXpectedList allocationcouNters

Ethernet, IP, UDP, tCp, sNmp, tFtp, [Menus]Telnet,

Ping [Display]

Terminal type, via Baud rate,Parity, Data bits, Stop bits, Load new config

Modem ,V.24 set-upV.24 set-up

Management

Interface, Display mode, Summary stylePhysical layer stats, Error type, Clear all data

Performance data

E1/T1 (A-H)

None, Local loop None, Local loop

SDH E1/T1 (A-H)Testing

SystemTime, Date, Node name, Password, Software version,Output config, Input config,

Warm start, Cold start, Sub-product number, Event logs [Menu]

Type of fibreTimingC1/J0 selectionJ0 transmitj0 eXpected

receivingE1 valueDeg det threshpaYloadPath signal labelreceiving

j1 transmitj1 eXpectedreceivingRDI typeUnused tribs sentcouNters

SDH/SONET port LAN port [no]Stateauto-NegotiationFlow controlMDI/MDIXmaC addressfcs GenerationmaX frame sizegfp paylOad fcsAllocationLCASmax diff delaY

RDI typeJ2 transmitj2 eXpectedlIst allocationcounTers

Main set-up menu

set- p toolsUUser interfaceRemote unit set-up

User interface (Simple)set-up wiZardRemote unit set-up

(Advanced) Remote Unit Set-upGet configPut config

Set-up wizardLAN portsE1/T1 portsE1/T1 interfaceConfigure unit


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76-02-059C 26

The MetroLAN 2000 differs from the MetroLAN1000 in that there is no Simple set-up optionwith a wizard. It also includes a DS3/E3 triple port option. The DS3/E3 option is described inthis section and is included on menu screens, but the user should note that ay references toDS3/E3 will only appear on a MetroLAN2000 product, and not on a MetrLAN1000 unit.

Figure 5.2 MetroLAN2000 menu structure

Note: When interacting with menus, pressing the key on any screen will returnyou to the previous screen in the structure.

Global status Display

Alarm extension Clear alarm outputs

SDH portVCLAN portE1/T1 portDS3/E3 port

Data port set-up

Ethernet, IP, UDP, tCp, sNmp, tFtp, [Menus]Telnet,

Ping [Display]

Terminal type, via Baud rate,

Parity, Data bits, Stop bits, Load new config

Modem ,V.24 set-upV.24 set-up

Management

Interface, Display mode, Summary style

Physical layer stats, Error type, HDLC layer statsClear all data

Performance data

None, Local loop

SDHTesting

SystemTime, Date, Node name, Password, Software version,Output config, Input config,Warm start, Cold start, Sub-product number, Event logs [Menu]

Main set-up menu

E1/T1 port [A-H]StateInterfaceRx sensitivity

AllocationRDI typeJ2 transmitj2 eXpectedList allocationcouNters

Type of fibreTimingC1/J0 selection

J0 transmitj0 eXpected

receivingE1 valueDeg det threshpaYloadPath signal labelreceivingj1 transmitj1 eXpectedreceivingRDI typeUnused tribs sentcouNters

SDH/SONET port LAN port [no]Stateauto-NegotiationFlow control

MDI/MDIXmaC addressfcs GenerationmaX frame sizegfp paylOad fcsAllocationLCASmax diff delaYRDI typeJ2 transmitj2 eXpectedlIst allocationcounTers

StateInterfaceRx sensitivity

AllocationRDI typeJ1transmitj1 eXpectedList allocationcouNters

E1/T1 (A-H)

None, Local loop None, Local loop

E1/T1 (A-H) DS3/E3 J,K,L


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5.2 Mapping

The SDH Next Generation development provides an encapsulation method that canaccommodate any data packet protocols and also exploits the SDH bandwidth efficiently.The SDH port on a MetroLAN product can be configured as up to 63x VC-12, 3x VC-3 or asingle VC-4 in accordance with the table below.

Figure 5.3 Virtual Containers supported by MetroLAN

5 .2.1 VC-4The payload from a single source (LAN port) is transported within the VC-4. No other datasources may be used.

5 .2.2 VC-3

The payload from up to 3 sources (such as a LAN port or E3/DS-3 ports) may be mappedinto a VC-3. E1/T1 payloads may not be used

5 .2.3 VC-12

The payloads from any E1/T1 ports and any LAN ports may be mapped into VC-12s for

transport.

Note:Payload mappings may be mixed at the TUG-3 level (see schematic over page). Each of the3 TUG-3s may be independently mapped to either VC-3 or VC-12 mappings.

SDH BandwidthKbps

PayloadKbps

Maxchannels

VC - 4 150336 149760 1

VC - 3 48960 48384 3

VC - 12 2240 2176 63


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76-02-059C 28

Figure 5.4 MetroLAN mapping schematic

STM-1OC-3 / STS-3155 Mbps

AUG-1STS-3

X 1

AU-4STS - 3c

X1

TUG-2VT-Group

X 7

X 3

TU-12VT-2

VC-12VT-2 SPE

C-12

SDH CONTAINER

LAN E1/T1

VC-4

STS-3c SPE

TUG-3

X3

SDH CONTAINER

TU-3

X1

VC-3

C-3

LAN E3/DS-3

C-4

SDH CONTAINER

LAN


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29 76-02-059C

5.3 Main Set-up Menu

Figure 5.5 Main set-up menu

When the unit has been powered up and the login procedure has been carried out, theMetroLAN MAIN MENUscreen appears on the Management Console, as shown in the figureabove. Note that the frist menu option set-Up tools appears only on the MetroLAN1000product.

The Main menu gives access to a range of menus that permit the set-up and configurationof the MetroLAN. The set-Up tools menu optionprovides access to the SET-UP WIZARDthat provides a simple way to make an initial configuration of the MetroLAN.

This section describes the utility aspects of set-up and the use of the wizard for simpleconfigurations of MetroLAN1000 units on dark fibre. Set-up using the Wizard is alsopresented as a freestanding Quick Start guide in the next section of this manual.

Section 7 of this manual, describes the detailed DATA PORT SET-UPmenus which may berequired by advanced system users. These are best described in a separate section.

Other facilities such as Performance monitoring, Management and Testing are accessiblefrom the MAIN SET-UPmenu and are described in later sections of this manual.

MAIN SET-UP

set-Up tools

Global status

alarm eXtension

Data port set-up

V.24 set-up

Management

System

Testing

Performance data


- exit menu


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76-02-059C 30

5.4 Using the Wizard to configure the MetroLAN1000

Select the first option on the main menu screen set-Up tools by pressing or on thekeyboard. The SET-UP TOOLS menu is then displayed. Select the item User Interface andtoggle with the space bar to select SIMPLE. This causes the item set-Up wizard to bedisplayed. Press to select the SET-UP WIZARD menu, as shown below.

Note that if the item User Interface is set toADVANCED, the Wizard option is not displayed,and you will be able to configure the system using the methods described in section 6 of thismanual.

Figure 5.6 Set-up tools menu

Figure 5.7 Set-up wizard screen

You may use the SET-UP WIZARD screen to instruct the wizard on your configuration.

5 . 4. 1 Select the number of LAN ports

The number of LAN ports to be used can range from 0 to 8. Set the number that you wish toconfigure by typing to select the LAN ports option. Then toggle the space bar on yourkeyboard to reach the number that you require e.g. 0,1,2,3......When you have selected theright number, press the key to accept.

5 . 4. 2 Select the number of E1/T1 ports

The number of E1/T1 ports to be used can range from 0 to 8. Set the number that you wishto configure by typing to select the E1/T1 PORTS option. Then toggle the space bar onyour keyboard to reach the number that you require e.g. 0,1,2,3......When you have selectedthe right number, press the key to accept.

SET-UP TOOLS SET-UP TOOLS

User interface Simple User interface Advanced

set-up wiZard Remote unit set-up

Remote unit set-up


- exit menu

SET-UP WIZARD

LAN ports 2

E1/T1 ports 1

E1/T1 interface E1

Configure unit


- exit menu


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31 76-02-059C

5 . 4. 3 Select E1/T1 interface type

Set the E1 or T1 interface that you wish to configure by pressing to select the E1/T1PORTS option. Then toggle the space bar on your keyboard to either E1 or T1 When youhave selected the right option, press the key to accept.

5.5 Configuring the unitWhen the required number of LAN and E1/T1 ports have been selected, you must ask thewizard to configure the MetroLAN. press to configure the unit. This will lead to theresponse:

Press to confirm the action, and the unit will configure itself with your chosenconfiguration.

5.6 Configuring the remote unit

Once the local MetroLAN has been configured there are two options for configuring theremote unit. Press to select the REMOTE UNIT SET-UPscreen, as shown below

Figure 5.8 Remote set-up menu screen

You must then press either or

to select the GetorPutoption in accordance with thefollowing rules:

5 . 6. 1 Get Config

If the local MetroLAN has been installed and configured using the wizard before the remoteunit has been installed, you must use the Get configoption.Press on your keyboard to select the Get configoption. The MetroLAN will fetch the newconfiguration and reboot the remote unit, after which it will be operational.

5 . 6. 2 Put Config

If the local MetroLAN has been powered up and connected to the fibre interface, then afterconfiguring the local unit with the wizard, you must use the Put configoption to send theconfiguration to the remote unit.

Press

on your keyboard to select the Put config option. The remote MetrolAN willreceive the new configuration and reboot itself, after which it will be operational.

Configuration will be over written

Are you sure?

REMOTE UNIT SET-UP

Get config 2

Put config 1


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5.7 Configuring MetroLAN units remotely

To access the MetroLAN from a remote location via an Ethernet connection, theManagement Port on the rear panel (labelled MAN PORT) must be connected to a 10BaseTLAN. The port is presented on an RJ45 connector for direct connection to a switch. The portis fixed for operation at 10Mbps, Half duplex.

5 . 7. 1 Setting the Unit IP Address

From the MAIN SET-UP menu, select the Management menu item and then select theEthernet menu.

Figure 5.9 Main set-up & Management screen menusI

Figure 5.10 Ethernet screen menu

In order to set, or change, the IP address the LAN port state must first be set to DOWN.

Configure the IP address using the format AA.BB.CC.DD

Configure the Network Mask, if not Class C

Activate the LAN port by changing the state to UP

MAIN SET-UP MANAGEMENT

set-Up tools Ethernet

Global status Data-link

alarm eXtension IP Data port set-up UDP

V.24 set-up tCp

Management sNmp

System Telnet

Testing tFtp

Performance data

ETHERNET

State Up

Phys. address 0:c0:81:0:5:da

DHCP On

IP address 0.0.0.0.

Network mask 0.0.0.0.

Broadcast address from bit 1

AT table

sTats


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5 . 7. 2 Setting a default Route

From the MAIN SET-UPmenu, select Managementand then the IPmenu, and then selectthe ROUTING TABLE.

Figure 5.11 IP screen menu

Figure 5.12 New Route screen menu

To add a new entry as the default route proceed as follows:

Destination 0.0.0.0Mask 0.0.0.0Interface Select Ethernet interfaceNext Hop IP Address of Next Hop Router

IP ROUTING TABLE

default TTL 1-255.255.255.255.

Max reassy time List routes

Routing table New route

Forwarding

Stats

NEW ROUTE

Destination 0.0.0.0.

Mask 0.0.0.0.

Next hop x.x.x.x.

Interface Ethernet

Activate


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5.8 Alarm extension

Selecting the menu itemALARM EXTENSIONon the MAIN SET-UPmenu leads to a furthermenu.Note that the menu item DS3/E3 port appears only on MetroLAN2000 models.

Figure 5.13 Alarm extension screen

5 .8.1 Clear Alarm Outputs

If the MetroLAN has detected a major or minor alarm condition the alarm extension isactivated. The alarm extension device may be muted by selecting CLEAR ALARMOUTPUTS. When this option is selected the alarm extension status (prior to the clearcommand) is shown below the menu.

Figure 5.14 Alarm status screen

Note: If the alarm extension has been cancelled with the CLEAR ALARM OUTPUTS option,the alarm is still indicated on the front panel indicator lights and in the performance statistics.

ALARM EXTENSION

clearAlarm outputs

SDH port

VC

LAN port

E1/T1 port

DS3/E3 port


- exit menu

Alarms cleared>FERF alarmPress any key to continue


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5 .8.2 SDH port alarm menu

The SDH PORToption shown below provides a display of all the alarms which are valid forthe MetroLAN. The alarms are labelled from 0 to 9 and A to Z in the firmware, and can beselected by their label. Note that even if the alarm extension menu item is set to NONE, theperformance reports described in Section 6 will continue to count alarms.

Figure 5.15 SDH Port alarm config

Note: Toggling the space bar permits the alarm to be configured by the user to MAJOR,MINOR or NONE. This affects which alarm extension relay is affected by an alarm. Theconfiguration rules are:

Figure 5.16 Alarm relay config

To reset the status of any alarm, select it by the number shown on the menu screen. It canbe set as MAJOR,MINORorNONEby toggling with the space bar through the optionsdisplayed.

Figure 5.17 Alarm relay options

SDH PORT

0 - LOS Major

1 - LOF Major

2 - LOC Minor

3 - AIS Minor

4 - FERF Minor

5 - SD Major

6 - OOF Major

7 - TIM Minor


- exit menu

MAJOR major relay

MINOR minor relay

NONE no relay

- change value

- save new value

exit without saving


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5 .8.3 VC

When the item VC is selected from theALARM EXTENSIONmenu, the user is requested toenter the VC klm number to select the VC required. The system responds with a list of VCalarms for that VC (KLM). Section 5.4.2 above describes how to change alarm states.

Figure 5.18 VC port selection

Figure 5.19 VC alarms

Note: When the VC port is being selected, the following actions are required:

VC4 is selected by pressing VC3 is selected by pressing 1,2 or 3 VC12 is selected by pressing klm

ALARM EXTENSION

clearAlarm outputs

SDH port

VC

LAN port

E1/T1 port

DS3/E3 port

Enter VCnumber (klm)

>

VC111

0 - LOP Major

1 - UNEQ Major

2 - PLM Major

4 - RDI Minor

5 - SD Major

6 - RFI Major

7 - TIM None

9 - CAIS Minor

A - LOM Minor


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5 .8.4 LAN port alarms

Each LAN port is numbered and is selected by number when the LAN port menu is activated.

Figure 5.20 LAN port selection

Figure 5.21 LAN port alarm

The LINKDOWNalarm is the only one applicable to the LAN ports. It can be set as MAJOR,

MINORorNONEby selecting the alarm number and toggling with the space bar through theoptions.


ALARM EXTENSION

clearAlarm outputs

SDH port

VC

LAN port

E1/T1 port

DS3/E3 port

Enter port number (1-8)>

LAN PORT 3

0 - LKDN Major

- change value

- save new value

exit without saving


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5 .8.5 E1/T1 port alarms

Each of the 8 E1/T1 ports is identified by letter (A-H) and is selected by typing the requiredletter when the menu is activated.

Figure 5.23 E1/T1 port selection

Figure 5.24 E1/T1 port alarms

The LOS and AIS alarms are applicable to the E1/T1 ports. They can be set as MAJOR,MINORorNONEby selecting the alarm number and toggling with the space bar through theoptions.


ALARM EXTENSION

clearAlarm outputs

SDH port

VC

LAN port

E1/T1 port

DS3/E3 port

Enter port name (A-H)

>

E1/T1 PORT C

0 - LOS Major

3 - AIS Minor

- change value

- save new value

exit without saving


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5 .8.6 DS3/E3 port alarms (MetroLAN2000 only)

Each of the 3 DS3/E3 ports is identified by letter J,K or L and is selected by typing therequired letter when the menu is activated.

Figure 5.26 E1/T1 port selection

Figure 5.27 Ds3/E3 port alarms

The LOS andAIS alarms are applicable to the DS3/E3ports. They can be set as MAJOR,MINORorNONEby selecting the alarm number and toggling with the space bar through theoptions.


ALARM EXTENSION

clearAlarm outputs

SDH port

VC

LAN port

E1/T1 port

DS3/E3 port

Enter port name (J-L)

>

DS3/E3 PORT K

0 - LOS Major

3 - AIS Minor

- change value

- save new value

exit without saving


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5.9 Data port set-up menus

The Data port set-up menus are described fully in Section 6, the next section in this manual.

5.10 V.24 set-up menu

The V.24 SET-UP screen allows you to set up the communications parameters for the

terminal attached to the management port.

Figure 5.29 V.24 Terminal set-up menu

5 .10.1 Terminal typeThe terminal type can beANSI, VT100/VT220 or TTY.

The ANSI and VT100/VT220 options give you a graphical presentation of the menus,whereas TTY is used where a dumb terminal device such as a Teletype is used forconfiguration and data presentation. Note that ANSI and VT100/220 terminals also highlightthe menu select letter.

The screen displays for these terminal types are shown in Section 4.

5 .10.2 Via Modem

This option specifies whether a modem is to be used or not. This default is NO.

Modem support causes you to be logged-out if the Ready-to-send (RTS) signal is droppedon the terminal port. The RTS line needs to be driven for V.24 operation if modem supportis on, so we recommend using a fully configured 25-way cable.

5 .10.3 Baud rate

The baud rates supported are 2400, 4800, 9600and 19200baud. The default setting is19200 baud.

5 .10.4 Parity

Parity may be set to NONE, ODD or EVEN.

V.24 SET-UP

Terminal type VT100/VT220

via Modem yes

Baud rate 9600bps

Parity None

Data bits 8Stop bits 2

Load new config


- exit menu


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5 .10.5 Data bits

The number of data bits may be 7or8.

5 .10.6 Stop bits

The number of stop bits may be 1 or2.

5 .10.7 Load new config

Except for the terminal type, the changes you make on the V.24 Set-up screen do not takeeffect until you register the changes in the MetroLAN. To do this, select LOAD NEWCONFIGafter you have made the necessary changes to the other values on this screen. You shouldthen change your terminal settings to match these values.


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5.11 Management

In addition to using the terminal port, the MetroLAN may be managed remotely by using aLAN-based network management system. In order to do this a LAN must be connected tothe Management port.

The operating parameters, event log, performance statistics database and diagnosticsfunctions are known collectively as the Management Information Base (MIB). The MetroLANMIB can be accessed remotely by using a Network Management System (NMS) connectedto the LAN. The NMS should use SNMP (Simple Network Management Protocol), and couldbe located on the local LAN or on a remote LAN connected to the local LAN via a LAN bridgeor IP router.

The MIB definitions supported have been placed in the public domain by Metrodata and canbe parsed in to any NMS supporting an ASN.1 MIB parser. For further information on themanagement interface and the MIB definition, please refer to the LM1100 SNMP Enableruser manual. The information given in this section is a brief summary to serve as anintroduction to the subject.

5 .11.1 Management menu

The LM1100 SNMP Enabler is fitted as standard to the MetroLAN, and the MAIN SET-UPmenu contains the option MANAGEMENT.


The MANAGEMENTmenu leads to a series of menus which permit you to configure thevarious system management protocols and parameters. Only the utility options Telnet, TFTPand PING are described below. For the other options, please refer to the Metrodata LM1100manual.

MAIN SET-UP

set-Up tools

Global status

alarm eXtension

Data port set-up

V.24 set-up

Management

System

Testing

Performance data


- exit menu


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Figure 5.31 Management menu

5 .11.2 Telnet Option

The Telnet option permits a Telnet session to be established between the local MetroLANand a remote unit.

.

Figure 5.32 Telnet screens

MANAGEMENT

Ethernet

Data-link

IP

UDP

tCp

sNmp

Telnet

tFtp

Ping


- exit menu

TELNET

telnet Client

Timeout 60

Metrodata MetroLAN: Local connection to [nodename]

Telnet>


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The following Telnet commands are available on MetroLAN and are displayed in responseto the command. Note that the MetroLAN does not use DNS facilities and thereforethat the IP Address of the device to be called must be used.

Figure 5.33 Telnet commands

5 .11. 3 TFTP

TFTP is used to upload or download software or config files from the device to or from aserver(CLIENTmode) or to permit remote devices to acquire files from the device (SERVERmode). The remote server or device is identified by its REMOTE IPaddress, which is typedinto a menu box after the menu item is selected.

Figure 5.34 TFTP menu screens

The two modes of TFTP operation are as follows:

a) In SERVERmode the device awaits GETorPUTaction from other remote devices. Themenu items SOFTWARE FILE NAMEorCONFIG FILE NAMEspecify the files which can betransferred. Note that Software may only be uploaded into the local device, whilst Config filescan be transferred in either direction.

b) In CLIENTmode, Config files may be downloaded from the server (GET), or may beuploaded to the server(PUT). Note that Software may only be uploaded (GET) into the local

Command Action

open Open a connection to an IP address

close Close a connection

abort Abandon a connection without waiting for confirmationfrom the called service

status Give a status report of the telnet session

quit Leave telnet

help Print help screen.

]

or type quit

Escape to command mode

TFTP TFTP

Mode Server Mode Client

remote IP 192.168.1.10 remote IP 192.168.1.10

Software file name MetroLAN.45 Get new software

Config file name MetroLAN.cnf get Config

Put config

Enter file name>


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device, whilst Config files can be transferred in either direction. The system requests a filename in response to selection of a GETorPUTaction from the menu.

5 .11. 4 Ping

PING is used to check that a selected device is responding on the network by sending aPING packet to its IP address, and receiving an acknowledgement if the connection issuccessful. When PING is selected from the screen, the following dialogue occurs if theconnection is successful. If it is not, the screen message is NO RESPONSE.

Figure 5.35 Ping screen

Enter file name, then wait>

Metrodata MetroLAN: Local connection to MetroLANDestination: [192.168.1.10]press any key to stop test

okayokay


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5.12 System menu

Figure 5.36 System menu

When you select Time, you will be prompted to enter the current time in the format hh:mm:ss.Note that this format uses the 24-hour clock. For example:

Figure 5.37 Time prompt

5 .12.1 Date

Enter the current date in the format dd/mm/yyyyy. For example, April 4th 2001 would be

entered as 4/4/2001. The corresponding day of the week is also displayed when you press. Leading zeros are suppressed by the date display.

Figure 5.38 Date prompt

The year is entered as an explicit 4 digit number (e.g. 2004), and processed as such in thefirmware. Dates between 01/01/1980 and 31/12/2047 are valid.

SYSTEM

Time 16:24:32

Date Mon 2/4/05

Node name [nodename]

Password ********

Software version 5.0

Output config

Input config

Warm start

Cold start

Sub-product no. 0

Event logs


- exit menu

Enter time (hh:mm:ss)> 14:30:00

Enter date [dd/mm/yyyy]> 4/7/2003


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5 .12.2 Node name

This is the name of the unit to which you are currently connected. The top of the screenindicates the current node by displaying

At the ENTER NEW NAMEprompt, you can enter the name you wish to give this node. Thename may be up to 16 characters with no spaces permitted.

Figure 5.39 Enter new name

5 .12.3 Password

This option is used to change the current password. The supervisory password, which allowsyou to change settings, is initially set to the model number, i.e. MetroLAN. If you wish tochange the password, select this item and then enter the new password.

The password may be up to 16 characters with no spaces permitted.

The password is not case-sensitive, which means that if you enter the password as uppercase letters, the unit will accept either upper or lower case, or a mixture of both, when younext log on.

Figure 5.40 Password prompt

For security, the characters you type are displayed on the screen as asterisks. You will alsobe asked to re-enter the password as a check.

5 .12.4 Software version

This display item shows the version number of software installed on the MetroLAN.

5 .12.5 Output configThis item facilitates the outputting of config information to an intelligent terminal or PCconnected to the MetroLANs terminal port and set up with a terminal emulator such asHyperterm. When OUTPUT CONFIG is selected from the menu screen, the followingmessage appears:

Figure 5.41 Output config screen response

Local connection to "[nodename]"

Enter new name>

Enter new password

Password> ********Verify>

Metrodata LA1000: local connection to [nodename] Alarms: None

Start capture then press a key

After transfer, stop capture then press another key.


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The Hyperterm path TRANSFER / CAPTURE TEXTis selected, and when a key is pressed,transfer of configuration data takes place into a nominated file. Note that the file is a .TXTtext file. As soon as the transfer is complete, the Hyperterm DISCONNECTbutton should bepressed to avoid capturing unwanted messages. A typical config file is shown below:

Figure 5.42 Metrodata Configuration dump file

5 .12.6 Input config

This item facilitates uploading of config information from a stored Text file into a MetroLAN.It also requires the use of a PC as an intelligent Management terminal connected to the unitsterminal port. When INPUT CONFIG is selected from the menu screen, the followingmessage appears:

Figure 5.43 Input config message screen

The Hyperterm path TRANSFER / SEND TEXT FILE is selected, together with the file

containing the config information. When a key is pressed, transfer of configuration data takesplace from a nominated file into the MetroLANs memory.

e.0.c=1 e.0.f=1

e.0.t=1 e.0.b=1 e.0.j=1

e.0.o=1 e.0.xa=8652 e.0.xi=49715

e.0.xt=58367 e.0.q=65536 e.1.c=1

e.1.l=1 e.1.f=5 e.1.t=1

e.1.j=1 e.1.xa=8652 e.1.xi=49715

e.1.xt=58367 e.1.q=65536 a.0.m=-1

a.0.a=1 a.0.h=2 a.0.c=1

a.0.p=1 a.0.s=28 a.1.m=-1

a.1.a=1 a.1.h=2 a.1.c=1

a.1.s=28 v.b=3 v.w=LA1000

v.a=31 v.r=2 v.e=1

g.n=egham3k g.t=60 p.0.e=3

p.0.d=1 p.0.i=5 p.0.v=1

p.1.i=5 p.2.i=5 n.0.a=1

n.0.p=0.192.129.0.1.255 n.0.n=255.255.255.0 n.0.b=1

n.1.n=255.255.255.0 n.1.b=1 n.1.t=1

n.2.b=1 n.2.t=2 n.2.f=255.255.255.255

i.t=32 s.up=161 s.ut=162

s.sc=public s.sw=public s.st=public

s.sm=255.255.255.255 s.ts=software s.tc=config

Send text file. Esc to end


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5 .12.7 Warm start

Selecting WARM STARTsimulates turning the mains power off then on again. This may benecessary if a network component hangs up. A warm start does not adversely affect theMetroLAN's configuration parameters, performance statistics database or event log.

5 .12.8 Cold start (Caution!)Selecting COLD START returns the MetroLAN's software configuration to the defaultsettings. All configuration parameters will be reset to their defaults, and the performancestatistics database and event log will be cleared. The [nodename]will be erased, but thereal-time clock will not be affected.

For security, you will be asked to confirm this request. Pressing Ywill perform the cold start,pressing any other key will cancel the request.

Note: This option should only be selected when absolutely necessary, since it maycause disruption to the network.

Operational reasons for needing to COLD STARTinclude real time clock problems when theRTC must be reset; a change of firmware version number in the MetroLAN owing to carryingout an upgrade; an invalid configuration, probably caused by corruption of the MetroLANRAM.The management terminal may need to be reset to default settings before you cancommunicate with the MetroLAN after a cold start. Section 5 shows the MetroLAN's defaultsettings.


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5 .12.9 Event Logs

Event logs are intended to provide a long-term history of major occurrences on the system.They can be the first port of call for a network manager when investigating a problem, andserve to confirm the status of the MetroLAN at any point in time from the last cold start. If acold start is performed, this log will be cleared and the first entry in the log will be the date

and time of that cold start.

The logs are all accessed from the SPECIAL menu. The logs record the most recent eventsat the top of the screen, with events sorted into backwards order of time. The log is dividedinto three separate logs on separate screens: SYSTEM EVENT LOG, ALARM EVENT LOGand CONFIG EVENT LOG.

The SYSTEM EVENT LOG records system level events

Figure 5.44 System event log

Note: If the system event log contains either the message SPURIOUS RESETorILLEGAL

INTERRUPT, please register this occurrence with your Supplier or Distributor of the product.

TheALARM EVENT LOG records alarms that have arisen since the last cold start. They arerecorded simply as MAJOR or MINOR alarms with ONorOFFstatus.

Figure 5.45 Alarm event log

--- System Event Log ---

16/8/99 23:27:35 power restored

16/8/99 23:19:07 illegal interrupt

15/8/99 00:09:33 power restored

15/8/99 00:09:28 power-down

Press any key to continue

--- Alarm Event Log ---

17/2/2001 08:20:23 Major ON POS

16/2/2001 13:21:00 Minor OFF POS

16/2/2001 12:52:38 Minor ON POS



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The CONFIG EVENT LOG records any configuration changes on the system. This can bevery useful since configuration actions may have been taken remotely, without theknowledge of the local user of a node

Figure 5.46 Config event log

5.13 Testing menu

This option gives you access to the MetroLANs diagnostic functions, which are explained indetail in Section 9, Test & Troubleshooting.

Figure 5.47 Testing menu

5.14 Performance data

The subject is described in section 7 of this manual.

--- Config Event Log ---

16/7/2001 08:20:23 Config updated

16/5/2001 13:21:00 Config updated

14/5/2001 11:32:38 Config updated


TESTING

SDH Local loop

E1/T1 A None

E1/T1 B None

E1/T1 C Local loop

E1/T1 D None

E1/T1 E None

E1/T1 F None

E1/T1 G None

E1/T1 H None

E3/DS3 J None

E3/DS3 K None

E3/DS3 L None

- change value

- save new value

- exit without saving


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QUICK START METROLAN1000 USING THE WIZARD

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6 QUICK START METROLAN1000 USING THE WIZARD

There are two methods available for setting-up the Dataports: Simple and Advanced. Themethod required is selected from the SET-UP TOOLS menu as shown below. The Simplemethod uses the Wizard, whilst the Advanced method is for users who wish to implement acustom set-up. Note that the Wizard does not appear as an option if you have selected

ADVANCED set-up, and it is only available on MetroLAN 1000 units.


Figure 6.2 Simple and Advanced menu screens

Since there is one SDH port, this does not have to be specified if using dark fibre.

The LAN set-up process is auto-negotiating and therefore configuration is automatic.

The User has simply to specify the number of LAN and number and type of E1/T1 ports toconfigure.

MAIN SET-UP

set-Up tools

Global status

alarm eXtension

Data port set-up

V.24 set-up Management

System

Testing

Performance data


- exit menu




Remote unit set-up


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6.1 Using the Wizard.

Figure 6.3 Set-up Wizard screen

The procedure for using the SET-UP WIZARD is described below

6 .1. 1 Select the number of LAN ports

The number of LAN ports to be used can range from 0 to 8. Set the number that you wish toconfigure by typing to select the LAN ports option. Then toggle the space bar on yourkeyboard to reach the number that you require e.g. 0,1,2,3......When you have selected theright number, press the key to accept.

6 .1. 2 Select the number of E1/T1 ports

The number of E1/T1 ports to be used can range from 0 to 8. Set the number that you wishto configure by typing to select the E1/T1 PORTS option. Then toggle the space bar onyour keyboard to reach the number that you require e.g. 0,1,2,3......When you have selectedthe right number, press the key to accept.

6 .1. 3 Select E1/T1 interface type

Set the E1 or T1 interface that you wish to configure by pressing to select the E1/T1PORTS option. Then toggle the space bar on your keyboard to either E1 or T1 When youhave selected the right option, press the key to accept.

6 .1. 4 Configuring the unit

When the required number of LAN and E1/T1 ports have been selected, you must ask the

wizard to configure the MetroLAN. press to configure the unit. This will lead to theresponse:

Press to confirm the action, and the unit will configure itself with your chosenconfiguration.

SET-UP WIZARD

LAN ports 2

E1/T1 ports 1

E1/T1 interface E1

Configure unit


- exit menu

Configuration will be over written

Are you sure?


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6.2 Configuring units remotely

Once the local MetroLAN has been configured, return to the SET-UP TOOLS menu press to select the REMOTE UNIT SET-UPscreen, as shown below.

Figure 6.4 Set-up tools menu screen

Figure 6.5 Remote set-up menu screen

You must then press either or

to select the GetorPutoption in accordance with thefollowing rules:

6 . 2. 1 Get Config

If the local MetroLAN needs to be installed and configured using the wizard after the remoteunit has been installed, you must use the Get configoption. An example of the use ofGet

configiswhen a local unit has become faulty and is replaced by a new unit.G

et configisthen used to download the remote units set-up to the local unit.

Press on your keyboard to select the Get configoption. The MetroLAN will fetch the newconfiguration and reboot the remote unit, after which it will be operational.

6 . 2. 2 Put Config

If the local MetroLAN has been powered up and connected to the fibre interface, then afterconfiguring the local unit with the Wizard, you must use the Put configoption to send theconfiguration to the remote unit.

Press

on your keyboard to select the Put config option. The remote MetrolAN willreceive the new configuration and reboot itself, after which it will be operational.

SET-UP TOOLS

User interface Simple

set-up wiZard

Remote unit set-up

REMOTE UNIT SET-UP

Get config 2

Put config 1


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6.3 Configuring MetroLAN units from a remote location

To access the MetroLAN from a remote location via an Ethernet connection, theManagement Port on the rear panel (labelled MAN PORT) must be connected to a 10BaseTLAN. The port is presented on an RJ45 connector for direct connection to a switch. The portis fixed for operation at 10Mbps, Half duplex.

6 . 3. 1 Setting the Unit IP Address

From the MAIN SET-UP menu, select the Management menu item and then select theEthernet menu.

Figure 6.6 Main set-up & Management screen menus

I

Figure 6.7 Ethernet screen menu

In order to set, or change, the IP address the LAN port state must first be set to DOWN.

Configure the IP address using the format AA.BB.CC.DD

Configure the Network Mask, if not Class C

Activate the LAN port by changing the state to UP

MAIN SET-UP MANAGEMENT

Global status Ethernet

alarm eXtension Data-link

Data port set-up IP V.24 set-up UDP

Management tCp

System sNmp

Testing Telnet

Performance data tFtp

ETHERNET

State Up

Phys. address 0:c0:81:0:5:da

DHCP On

IP address 0.0.0.0.

Network mask 0.0.0.0.

Broadcast address from bit 1AT table

sTats


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6 .3. 2 Setting a default Route

From the MAIN SET-UPmenu, select Managementand then the IPmenu, and then selectthe ROUTING TABLE.

Figure 6.8 IP screen menu

Figure 6.9 New Route screen menu

To add a new entry as the default route proceed as follows:

Destination 0.0.0.0Mask 0.0.0.0Interface Select Ethernet interfaceNext Hop IP Address of Next Hop Router

IP ROUTING TABLE

default TTL 1-255.255.255.255.

Max reassy time List routes

Routing table New route

Forwarding

Stats

NEW ROUTEDestination 0.0.0.0.

Mask 0.0.0.0.

Next hop x.x.x.x.

Interface Ethernet

Activate


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ADVANCED DATA PORT SET-UP MENUS

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7 ADVANCED DATA PORT SET-UP MENUS

The screens below show the path to be taken to select a LAN port or an E1/T1 port forconfiguration. Since there is only one SDH port, the menu goes directly to the SDH configscreen without the need to identify the port. Note that LAN ports are numbered, whilst E1/T1and E3/DS3 ports (MetroLAN 2000) are named by letters.Not that the set-Up tools menu

item appears only on MetroLAN1000 products.


From the MAIN SET-UPmenu, select setUp tools and then the User interface option. Togglethe option toAdvancedand you will see the screen on the right below.

Figure 7.2 Simple and Advanced menu screens

Next, press to return to the MAIN MENU and press to view the DATAPORT

SET-UPscreen that you will use to configure the MetroLAN unit.

Figure 7.3 Dataport set-up menu

MAIN SET-UP

set-Up tools

Global status

alarm eXtension

Data port set-up

V.24 set-up Management

System

Testing

Performance data




Remote unit set-up

DATA PORT SET-UP

SDH port

LAN port

E1/T1 port

DS3/E3 port


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press or or or to select the port type that you wish to configure. The SDHoption responds directly with the SDH /SONET PORTmenu. The other 3 port types respondwith a screen requesting the port number/letter to select the port to be configured.

Figure 7.4 Select LAN port by number

Figure 7.5 Select E1/T1 port or DS3/E3 port by letter

Following sub-sections of this manual describe the configuration process for each port type.

Enter port number (1-8) Enter port number (1-3)

> >

Enter port name (A-H)) Enter port name (J-L))

> >


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7.1 SDH port set-up

When the SDH port has been selected for set-up, a two page menu screen is available tothe user as shown below. Page change is done by pressing > or< as shown on the messagescreens below.

Figure 7.6 SDH port set-up menu screens 1 & 2

SDH/SONET PORT

Framing SDH

Type of fibre SM short-haul

Timing Loop

C1/J0 selection C1

E1 value 00

sD thresholds

paYload -

Path signal label Auto

receiving 02 (TUG structure)

j1 transmit

j1 eXpected

receiving


> - next page

- exit menu

SDH/SONET PORT

RDI type 1 - bit

Unused tribs send Unequipped

couNters


< - previous page

- exit menu


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The definitions of the menu items are given below.

7 .1. 1 Type of fibre

The port establishes and displays the type of fibre transceiver that is fitted to the MetroLAN.

7 .1. 2 TimingThis item is eitherLOOPorINTERNALLOOP timing uses the Receive timing as the sourcefor the Transmit timing. INTERNAL timing uses the local oscillator.

7 .1. 3 C1/J0 selection

This item is eitherC1 or J0.C1 is the C1 overhead byte applicable to early SDH implementations. It is a fixed value andshould be set to 1.J0is a later implementation of G.707 which enables the user to put a label or address on theinterface to permit easy checking that link connections are correct. This is explained

immediately below.

7 .1. 4 J0 transmit/J0 expected & receiving

The J0 TRANSMIT function permits a label to be placed onto a transmission. This is usuallyan alphanumeric string

metrolan manual

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