Manual de Instalación y Operación de los Modulos ML+MLF-2e

7/29/2019 Manual de Instalacin y Operacin de los Modulos ML+MLF-2e

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ML-1E1/ML-2E1,MLF-1E1/MLF-2E1

Installation and Operation Manual

ingle/Dual E1 Main Link

Modules

MEGAPLEX-2100


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ML-1E1/ML-2E1,

MLF-1E1/MLF-2E1Single/Dual E1 Main Link Modules

Installation and Operation Manual

NoticeThis manual contains information that is proprietary to RAD Data Communications Ltd. ("RAD"). No

part of this publication may be reproduced in any form whatsoever without prior written approval byRAD Data Communications.

Right, title and interest, all information, copyrights, patents, know-how, trade secrets and otherintellectual property or other proprietary rights relating to this manual and to the ML-1E1/ML-2E1,MLF-1E1/MLF-2E1 and any software components contained therein are proprietary products of RADprotected under international copyright law and shall be and remain solely with RAD.

ML-1E1/ML-2E1, MLF-1E1/MLF-2E1 is a registered trademark of RAD. No right, license, or interest tosuch trademark is granted hereunder, and you agree that no such right, license, or interest shall beasserted by you with respect to such trademark.

You shall not copy, reverse compile or reverse assemble all or any portion of the Manual or theML-1E1/ML-2E1, MLF-1E1/MLF-2E1. You are prohibited from, and shall not, directly or indirectly,

develop, market, distribute, license, or sell any product that supports substantially similar functionalityas the ML-1E1/ML-2E1, MLF-1E1/MLF-2E1, based on or derived in any way from the ML-1E1/ML-2E1,MLF-1E1/MLF-2E1. Your undertaking in this paragraph shall survive the termination of this Agreement.

This Agreement is effective upon your opening of the ML-1E1/ML-2E1, MLF-1E1/MLF-2E1 package andshall continue until terminated. RAD may terminate this Agreement upon the breach by you of anyterm hereof. Upon such termination by RAD, you agree to return to RAD the ML-1E1/ML-2E1,MLF-1E1/MLF-2E1 and all copies and portions thereof.

For further information contact RAD at the address below or contact your local distributor.

International HeadquartersRAD Data Communications Ltd.

24 Raoul Wallenberg St.Tel Aviv 69719 IsraelTel: 972-3-6458181Fax: 972-3-6498250E-mail: [email protected]

U.S. HeadquartersRAD Data Communications Inc.

900 Corporate DriveMahwah, NJ 07430 USATel: (201) 529-1100, Toll free: 1-800-444-7234Fax: (201) 529-5777E-mail: [email protected]

19882004 RAD Data Communications Ltd. Publication No. 764-209-12/04
mailto:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]:[email protected]


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1

Quick Start Guide

If you are familiar with the ML and MLF modules, use this guide to prepare it foroperation.

Preliminary Preparations ML-1E1/ML-2E1

Internal Settings

Refer to the figure below and set ML-2E1 jumpers as required. For ML-1E1modules, ignore the jumpers serving link 2.

Pins 3,6 of RJ-45

Connector of Link 1

not Connected to

Frame GroundNO

YES

Jumper JP35 FGND3, 6

Pins 3,6 of RJ-45Connector of Link 1

Connected to

Frame Ground

NORM

SQR

Station Clock Input

Waveform - JP8 ST CLK

Normal

AMI Signal

Squarewave

Signal

Link 1 Jumpers

Link 2 Jumpers

Station Clock Jumpers

JP29

JP35

JP30

CH1

FGND3, 6

JP37

Link 1 Interface

JP17, JP21, JP23, JP25, JP27, JP29, JP30

120

Balanced

BAL

JP29

JP30

75

UnbalancedUNBAL

BAL

UNBAL

JP17

JP21

JP23

JP25

JP27

JP17

JP21

JP23

JP25

JP27

JP29

JP30

Link 2 Interface

JP18, JP22, JP24, JP26,

JP28, JP34, JP36

Settings same as detailedfor Link 1 Interface

Pins 3,6 of RJ-45

Connector of Link 2

not Connected toFrame Ground

NO

YES

Pins 3,6 of RJ-45

Connector of Link 2

Connected to

Frame Ground


JP8

ST CLK

JP17

JP21

JP23

JP25

JP27

JP33

JP34

JP36

CH2 FGND3, 6

JP18

JP22

JP24

JP26

JP28

JP31

JP32

JP14

JP16

JP15

Station Clock Interface

JP14, JP15, JP16, JP31, JP32

75

Unbalanced

BAL

JP31

JP32

JP14

JP15

JP16

JP14

JP15

JP16

UNBALJP31

JP32

Jumper JP37 ST PIN6 FGND

Pin 6 of CLOCKConnectorConnected to

Frame Ground

YES

Pin 6 of CLOCK

Connector not

Connected to

Frame GroundNO

BAL

UNBAL

120

Balanced


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Quick Start Guide ML/MLF Installation and Operation Manual

2

Cable Connections

Insert the module in the assigned I/O slot, and then connect the prescribed cablesto the module connectors as follows:

Each Link - Unbalanced Interface E1 transmit cable connect to the corresponding CH OUT connector.

or E1 receive cable connect to the corresponding CH IN connector.

Balanced Interface Connect cable to the corresponding CH RJ-45 connector.Station Clock Connect cable to CLOCK RJ-45 connector.

Preliminary Preparations MLF-1E1/MLF-2E1

MLF modules may include Class 1 lasers. For your safety:

Do not look directly into optical connectors while the MLF module isoperating.

Do not attempt to adjust the laser drive current.

The use of optical instruments with this product will increase eye hazard.Laser power up to 1 mW could be collected by an optical instrument.

Use of controls or adjustment or performing procedures other than thosespecified herein may result in hazardous radiation exposure.

Internal Settings (MLF-1E1 Only)

Refer to the figure below and set MLF-1E1 jumpers as required.

JP37

JP31

JP32

JP8

ST CLK

NORM

SQR

Station Clock Input


Normal

AMI Signal

Squarewave

Signal

JP14

JP16

JP15

Pin 6 of CLOCK

Connector

Connected to

Frame Ground

Jumper JP37 ST PIN6

YES

Pin 6 of CLOCK

Connector not

Connected to

Frame GroundNO


JP14, JP15, JP16, JP31, JP32

75

Unbalanced

100

BalancedBAL

JP31

JP32

JP14

JP15

JP16

JP14

JP15

JP16

UNBAL

JP31

JP32

Warning


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ML/MLF Installation and Operation Manual Quick Start Guide

3

Cable Connections

Insert the module in the assigned I/O slot, and then connect the prescribed cablesto the module connectors as follows:

E1 transmit fiber Connect to the corresponding TX connector.Each Link

E1 receive fiber Connect to the corresponding RX connector.

Station Clock(MLF-1E1 only)

Connect cable to CLOCK RJ-45 connector.

General Configuration Procedure

System Parameters

Configure system parameters related to operating mode using DEF SYS command:

Parameter V5.2 APP Logical Link ID Interface ID Startup Mode Reprovision

Range ofValues

NONEV5.2 ENPOINT (*)

0 to 255 0 to 16777215 SYNCASYNC

N/A

* Can be selected only if Megaplex includes ML-1E1/V5.2 or ML-2E1/V5.2.

Port Parameters

Configure each port using the command DEF CH SS:*, where SS is the moduleslot number:

Parameter Service Logical Link ID Interface ID Startup Mode Reprovision

Range ofValues

LEGACYV5.1

V5.2 MASTER(notsupported)

N/A LEGACY:N/A

V5.1: 0 to16777215

LEGACY: N/A

V5.1: SYNCASYNC

LEGACY: N/A

V5.1: YESNO

Parameter Connect Frame Sig. Profile Idle Code CGA

Range ofValues

YESNO

G.732NG.732N-CRC4G.732SG.732S-CRC4

1 to 5 00 to FF NONETRANSFULL

Parameter Redundancy Rx Gain Voice OOS Data OOS OOS Signaling

Range ofValues

NONE

Y-CABLE (ML modules only)DUAL CABLE P.TXRING REDUNDANCY

ML Modules

SHORT HAULLONG HAUL

MLF Modules

N/A(not applicable)

00 to FF 00 to FF FORCED BUSYFORCED IDLEBUSY IDLEIDLE BUSY

Parameter Restoration Time Inband Management Inband Management Rate

Range ofValues

CCITT10 SECONDS (62411)1 SECOND (FAST)

OFFTS0DEDICATE TSDEDICATE PPPDEDICATE FR

N/Afor Inband Management = OFF

TS0: 4 kbps8 kbps12 kbps16 kbps20 kbps

Other: 64 kbps


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Quick Start Guide ML/MLF Installation and Operation Manual

4

Cont.

Parameter Routing Protocol Redundancy Partner Slot Redundancy Partner Ch

Range ofValues

N/Afor Inband Management = OFF

NONEPROPRIETY RIPRIP2PROP RIP NO NMS TX

IO-1 to IO-12 EX1,EX2

Parameter Recovery Time, sec Primary

Range ofValues

0 through 99 YES

NO


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ML/MLF Installation and Operation Manual i

Contents

Chapter 1. Introduction1.1 Overview.................................................................................................................... 1-1

Purpose and Main Features...................................................................................................1-1Versions............................................................................................................................... .1-1Application Considerations ...................................................................................................1-2

1.2 Physical Description.................................................................................................... 1-3ML-2E1 Module Panel ..........................................................................................................1-3ML-1E1 Module Panel ..........................................................................................................1-4MLF-2E1 Module Panel ........................................................................................................1-5MLF-1E1 Module Panel ........................................................................................................1-6

1.3 Functional Description................................................................................................ 1-7ML-2E1 Functional Block Diagram ........................................................................................1-7E1 Link Interface Characteristics..........................................................................................1-10Framing ..............................................................................................................................1-11Processing of Channel-Associated Signaling .........................................................................1-11

Support for V5.1 Interfaces .................................................................................................1-13External (Station) Clock Interface Characteristics..................................................................1-13Timing............................................................................................................................... .1-14Redundancy .......................................................................................................................1-15Test Subsystem (ML-2E1 and MLF-2E1 only) .......................................................................1-16Diagnostics .........................................................................................................................1-17

1.4 Technical Specifications............................................................................................ 1-19Chapter 2. Module Installation and Operation

2.1 General ...................................................................................................................... 2-12.2

Preparation for Installation.......................................................................................... 2-2

ML-2E1 Internal Settings .......................................................................................................2-2ML-1E1 Internal Settings .......................................................................................................2-3MLF-1E1 Internal Settings .....................................................................................................2-4

2.3 Module Installation ..................................................................................................... 2-52.4 Cable Connections ..................................................................................................... 2-6

Connection Data ..................................................................................................................2-6Connection Instructions ........................................................................................................2-7

2.5 Normal Indications ..................................................................................................... 2-8Module Status Indication ......................................................................................................2-8Link Status Indications ..........................................................................................................2-8

Chapter 3. Configuration Instructions3.1 General ...................................................................................................................... 3-13.2 Preliminary Configuration ........................................................................................... 3-1

Outline of Preliminary Configuration.....................................................................................3-1Selecting the Megaplex Operating Mode...............................................................................3-1

3.3 ML Configuration Instructions Legacy Mode............................................................. 3-2Outline of Configuration Procedure for Legacy Mode............................................................3-2E1 Port Parameters Legacy Mode .......................................................................................3-2Redundancy Configuration Guidelines Legacy Mode .........................................................3-7


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Table of Contents

ii ML/MLF Installation and Operation Manual

3.4 ML Configuration Instructions V5.1 Mode................................................................ 3-8Preliminary Configuration Steps for V5.1 Mode.....................................................................3-8Outline of Configuration Procedure for V5.1 Mode...............................................................3-8E1 Port Parameters V5.1 Mode ..........................................................................................3-8

3.5 Configuring Legacy Main Link Ports in Megaplex Chassis Operating in theV5.2 Mode ............................................................................................................... 3-11

General ..............................................................................................................................3-11Specific Configuration Instructions for V5.2 Applications .....................................................3-11Bypassing Timeslots from Legacy Main Link Ports ................................................................3-11

3.6 Displaying ML Interface Type.................................................................................... 3-11Modules with Copper Interfaces..........................................................................................3-12Modules with Optical Interfaces..........................................................................................3-12

Chapter 4. Alarms & Diagnostics4.1 General ...................................................................................................................... 4-14.2 Diagnostics ................................................................................................................. 4-1

General ................................................................................................................................4-1Local Main Link Port Loopback .............................................................................................4-2Remote Main Link Loopback ................................................................................................4-3Tests and Loopbacks on Timeslots (LOOP/BERT PER TS) ...................................................... .4-6

4.3 Troubleshooting Instructions ..................................................................................... 4-104.4 Technical Support..................................................................................................... 4-10


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Table of Contents

ML/MLF Installation and Operation Manual iii

List of Figures1-1. ML-2E1 Module Panel........................................................................................................... 1-31-2. ML-1E1 Module Panel........................................................................................................... 1-41-3. MLF-2E1 Module Panel ......................................................................................................... 1-51-4. MLF-1E1 Module Panel ......................................................................................................... 1-6

1-5. ML-2E1/MLF-2E1, Functional Block Diagram ........................................................................ 1-7

2-1. ML-2E1 Module, Internal Jumpers ......................................................................................... 2-32-2. ML-1E1 Module, Internal Jumpers ......................................................................................... 2-42-3. Typical MLF-1E1 Module, Internal Jumper ............................................................................ 2-5

4-1. Local Main Link Loopback Signal Path................................................................................... 4-24-2. Remote Main Link Loopback Signal Path............................................................................... 4-34-3. Local BER Test on Main Link Port, Signal Paths ...................................................................... 4-44-4. Remote BER Test on Main Link Port, Signal Paths .................................................................. 4-54-5. Local Test Tone Injection Path............................................................................................... 4-8

4-6. Forward Test Tone Injection Path .......................................................................................... 4-9

List of Tables1-1. ML-2E1 Indicators ................................................................................................................. 1-31-2. ML-1E1 Indicators ................................................................................................................. 1-41-3. MLF-2E1 Indicators ............................................................................................................... 1-51-4. MLF-1E1 Indicators ............................................................................................................... 1-61-5. Fiber Optic Interface Characteristics .................................................................................... 1-112-1. ML-2E1 Module Internal Jumpers .......................................................................................... 2-22-2. RJ-45 Balanced Main Link Connector, Pin Functions ............................................................. 2-62-3. CLOCK Connector, Pin Functions.......................................................................................... 2-63-1. E1 Port Parameters Legacy Mode......................................................................................... 3-23-2. E1 Port Parameters V5.1 Mode........................................................................................... 3-8


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Table of Contents

iv ML/MLF Installation and Operation Manual


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Overview 1-1

Chapter 1

Introduction

1.1 Overview

Purpose and Main Features

This manual describes the technical characteristics, applications, installation andoperation of the family of E1 main link modules for the Megaplex-2100 andMegaplex-2104 modular E1/T1 multiplexer systems.

The function of the main link modules is to interface between the TDM buses ofthe Megaplex chassis and the external communication links. The modules can alsoperform signaling format conversions and provide support for the R2 signalingprotocol.

In addition, the main link modules provide the timing signals used by the othermodules installed in the same chassis, and can also provide the chassis timingreference. The chassis timing reference is used in common by all the MegaplexTDM buses.

A Megaplex-2100 or Megaplex-2104 equipped with E1 main link modules can beused both as a legacy TDM multiplexer and as an access multiplexer to localexchanges using ETSI V5.1 interfaces.

RAD also offers E1 main link modules, ML-1E1/V5.2 and ML-2E1/V5.2, that supportETSI V5.2, for direct connection to V5.2 local exchanges. See ML-1E1/V5.2,ML-2E1/V5.2 Installation and Operation Manual for details.

Versions

RAD offers the following versions of E1 main link modules:

Copper interface E1 main link modules. These modules are available in twomain versions:

Dual-link module, ML-2E1

Single-link module, ML-1E1.

Fiber-optic E1 main link modules. The use of fiber optic interfaces provides asecure link in hazardous or hostile environments, increases the maximumconnection range, and provides immunity against electrical interference andprotection against the deleterious effects of ground loops.

These modules are available in two versions:

Dual-link module, MLF-2E1

Single-link module, MLF-1E1.

Note


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Chapter 1 Introduction ML/MLF Installation and Operation Manual

1-2 Overview

The information presented in this manual covers ML hardware revision 2.1 andhigher operating in Megaplex units with software version 11 and higher.

In this manual, the generic termMegaplexis used when the information isapplicable to both the Megaplex-2100 and Megaplex-2104 versions, and the termML module is used when the information is applicable to all the module versions.The complete equipment designation is used only for information applicable to a

specific equipment version.

Application Considerations

The ML modules can serve all the four TDM buses in a Megaplex chassis andsupport the full bandwidth of TDM buses (31 timeslots). ML modules can beinstalled in any I/O slot.

The number of ML modules actually installed in a Megaplex chassis can beselected in accordance with the number of E1 links required by the specific usersapplication. The only restrictions are:

Any timeslot can be routed to only one main link, except for timeslots assigned

to unidirectional and bidirectional applications. The equipment connected to the remote ends of each link uses loopback

timing (i.e., its timing is locked to the Megaplex nodal timing).

The ML modules support main link card redundancy, including ring redundancy.

For details regarding the integration of the ML modules in Megaplex systems andsystem applications, refer to the Megaplex-2100 Installation and Operation Manual.

Note


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ML/MLF Installation and Operation Manual Chapter 1 Introduction

Physical Description 1-3

1.2 Physical Description

All the ML modules are 4U-high and occupy one module slot in theMegaplex-2104 and Megaplex-2100 chassis.

ML-2E1 Module Panel

The panel of the ML-2E1 module is shown in Figure 1-1. The module panelincludes two groups of status indicators (one group for each port), and a commonalarm indicator. Table 1-1 explains the functions of the indicators located on themodule panel.

Each set of port connectors includes:

One eight-pin RJ-45 connector for the balanced port interface

Two 1.0/2.3 mm female coaxial (mini BNC) connectors, designated OUT(transmit output) and IN (receive input) for the unbalanced port interface.

A CBL-MINIBNC-BNC cable is available from RAD for converting each

1.0/2.3 mm female coaxial connector to standard BNC coax interface.The ML-2E1 module has two sets of connectors, one for each port, and anadditional RJ-45 connector, designated CLOCK, for the external (station) clock.

Table 1-1. ML-2E1 Indicators

Indicator Description

ALARM Lights when a fault has been detected in the module

ON LINE Lights steadily when the corresponding port is operating properly and is

active (i.e., it is connected to a TDM bus, and when included in aredundancy pair serves as the master port).

Flashes when the corresponding port is operating properly, but serves asthe standby port when main link redundancy is enabled.

Off when the corresponding port is defective, or is not connected to aTDM bus

LOC S. LOSS Lights when the corresponding local module port has lost framesynchronization

REM S. LOSS Lights when a loss-of-frame synchronization indication is received bythe corresponding port from the equipment connected to the remoteend of the link

TST Lights when a test is being performed on the corresponding port

Figure 1-1. ML-2E1 Module Panel

Note that only one type of port interface can be in use at any time. However,different interfaces can be selected on each link.

ML-2E1

ALARM

REM

ON

LINE

S. LOSS

IN

OUTC

1

H

2

C

H

IN

OUT

LOC

TST

LINE

REMLOC

TSTON

S. LOSS

K

C

O

L

C


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1-4 Physical Description

ML-1E1 Module Panel

The panel of the ML-1E1 module is shown in Figure 1-2.

Table 1-2 explains the functions of the indicators located on the module panel.

Table 1-2. ML-1E1 Indicators



ON LINE Lights steadily when the module is operating properly and is active(i.e., it is connected to a TDM bus, and when is included in aredundancy pair serves as the master module).

Flashes when the module is operating properly, but serves as thestandby module when main link redundancy is enabled.

Off when the module is defective, or is not connected to a TDM bus

LOC S. LOSS Lights when the local module has lost frame synchronization

REM S. LOSS Lights when a loss-of-frame synchronization indication is received bythe module from the equipment connected to the remote end of thelink

TST Lights when a test is being performed on the module

Figure 1-2. ML-1E1 Module Panel

The ML-1E1 module port has the following connectors for its E1 interface:

One eight-pin RJ-45 connector for the balanced port interface

Two 1.0/2.3 mm female coaxial (mini BNC) connectors, designated OUT(transmit output) and IN (receive input) for the unbalanced port interface.

A CBL-MINIBNC-BNC cable is available from RAD for converting each1.0/2.3 mm female coaxial connector to standard BNC coax interface.

Note that only one of these interfaces can be in use at any time.

In addition, the module has one RJ-45 connector, designated CLOCK, for theexternal (station) clock.

ML-1E1

ALARM

REM

ON

LINE

S. LOSS

IN

OUT

LOC

TST

K

C

O

L

C


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Physical Description 1-5

MLF-2E1 Module Panel

The panel of the MLF-2E1 module is shown in Figure 1-3.

The module panel includes two groups of status indicators (one group for eachport), and a common alarm indicator. Table 1-3 explains the functions of theindicators located on the module panel.

Table 1-3. MLF-2E1 Indicators



ON LINE Lights steadily when the corresponding port is operating properly and isactive (i.e., it is connected to a TDM bus, and when included in aredundancy pair serves as the master port).

Flashes when the corresponding port is operating properly, but serves asthe standby port when main link redundancy is enabled.

Off when the corresponding port is defective, or is not connected to aTDM bus

LOC S. LOSS Lights when the corresponding local module port has lost framesynchronization

REM S. LOSS Lights when a loss-of-frame synchronization indication is received bythe corresponding port from the equipment connected to the remoteend of the link

TST Lights when a test is being performed on the corresponding port

Figure 1-3. MLF-2E1 Module Panel

The MLF-2E1 module has two sets of connectors, one for each port. Each set ofport connectors includes two fiber optic connectors, designated TX (transmitoutput) and RX (receive input).

RX

TX

S. LOSS

S. LOSS

ALARM

TX

RX

LINE

REMLOC

TSTON

LINE

REMLOC

TSTON

H

1

C

2

C

H

MLF-2E1

LASER

CLASS

1


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1-6 Physical Description

MLF-1E1 Module Panel

The panel of the MLF-1E1 module is shown in Figure 1-4.

Table 1-4 explains the functions of the indicators located on the module panel.

Table 1-4. MLF-1E1 Indicators



ON LINE Lights steadily when the module is operating properly and is active (i.e.,it is connected to a TDM bus, and when included in a redundancy pair serves as the master module).

Flashes when the module is operating properly, but serves as thestandby module when main link redundancy is enabled.

Off when the module is defective, or is not connected to a TDM bus

LOC S. LOSS Lights when the local module has lost frame synchronization

REM S. LOSS Lights when a loss-of-frame synchronization indication is received bythe module from the equipment connected to the remote end of thelink

TST Lights when a test is being performed on the module

Figure 1-4. MLF-1E1 Module Panel

The MLF-1E1 module has two fiber optic connectors, designated TX (transmitoutput) and RX (receive input).

In addition, the module has one RJ-45 connector for the external (station) clock.

S. LOSS

ALARM

TX

RX

LINE

REMLOC

TSTON

H

1

C

MLF-1E1

L

K

O

C

C

LASER

CLASS

1


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Functional Description 1-7

1.3 Functional Description

ML-2E1 Functional Block Diagram

Figure 1-5 shows the functional block diagram of the ML-2E1 and MLF-2E1modules. The functional block diagrams of the ML-1E1 and MLF-1E1 modules are

similar, except for the following differences:

The ML-1E1 and MLF-1E1 modules have only one main link interface.

The ML-1E1 and MLF-1E1 modules do not include a test subsystem.

ML-2E1/MLF-2E1

E1 Link 1

E1 Link 2

Routing

Matrix

Link

Interface

(Port EX1)

Link

Interface

(Port EX2)

BypassRelay

(ML-2E1 only)

TDM

Bus B

Interface

TDM

Bus D

Interface

TDM

Bus C

Interface

TDMBus A

Interface

TDMBusA

TDMBusB

TDMBusC

TDMBusD

Test

Subsystem

Timing and

Clock Signals

Internal

Timing

Generator

Internal

Clock & Timing

Signals

Main Clock

Fallback ClockClock

Generator

ClockSelection

RX Clocksfrom LinkInterfaces

To CLModule

Control

To Link Interfaces

Management

Channel

Station Clock Station

Clock

Station Clock

Interface

(ML-2E1, ML-1E1

and MLF-1E1 only)

Local

Management

Figure 1-5. ML-2E1/MLF-2E1, Functional Block Diagram


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1-8 Functional Description

The ML module includes the following main subsystems:

TDM bus interfaces

Routing (option for cross-connect) matrix

Link interfaces

Bypass relay (option for ML-2E1 only)

Timing subsystem Test subsystem (not installed on ML-1E1 and MLF-1E1)

Local management subsystem.

TDM Bus Interfaces

The ML module has four independent TDM bus interfaces, one for each MegaplexTDM bus. Each TDM bus interface is used to connect timeslots from thecorresponding bus to the internal routing matrix of the ML module, in accordancewith the commands received from the CL module.

Although the ML module supports all the TDM buses, it is not always possible to

use all the buses. This occurs because in any Megaplex chassis, the maximumnumber of TDM buses that can be actually used is determined by the modulesinstalled in the chassis: the maximum number cannot exceed the smallest numberof buses supported by any module in the chassis, which can vary from 2 to 4.

The maximum number of buses to be actually used can be selected by the user, toensure that it does not exceed the maximum number supported by the hardwareof the modules installed in the chassis.

Routing Matrix

The ML module includes a routing matrix that controls the routing of timeslotswithin the module. Matrix routing is user-programmable, under the control of theCL module, and enables connecting any timeslot between any two ports. As aresult, the matrix can be used to perform the following functions:

Controls the signal flow between the link interfaces and the four TDM buses.

Connect timeslots from I/O channels of modules installed in the Megaplex tothe desired main link interface. This is performed by connecting the desiredtimeslots from the TDM buses to a link interface.

Bypass timeslots between the main link interfaces located on ML-2E1 andMLF-2E1 modules, without requiring bandwidth on the chassis TDM buses.This is performed by directly connecting the desired timeslots from one mainlink interface to the other link interface.

Bypass timeslots from main links located on other modules to the main linkinterfaces located on the ML module. This bypass does require bandwidth onthe TDM buses.

Supports unidirectional routing of timeslots, and broadcasting from onetimeslot to multiple destinations. The unidirectional broadcast routing mode issupported for all the I/O modules installed in the chassis; the bidirectionalbroadcast routing mode is supported for the LS-6, LS-12, VC-2, VC-6, HS-R,HS-2, HS-3 and HS-Q modules.


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When using channel-associated signaling, the matrix also routes the signalinginformation associated with each channel in parallel with the channel data.

The matrix also controls the flow of inband management traffic between the CLmodule and the appropriate link interfaces. As shown in Figure 1-5, themanagement connection uses a different communication channel and thereforedoes not occupy timeslots on the TDM buses.

In addition to the payload routing functions described above, the routing matrixalso supports a wide range of test and loopback functions, which include:

Local and remote loopbacks

Local and remote BER tests (not available on ML-1E1 and MLF-1E1)

Local and remote test tone injection (not available on ML-1E1 and MLF-1E1).

Test and loopback functions can be activated at three levels:

On an external port

On individual timeslots

On bits of timeslots using split timeslot assignment.

Loopbacks are activated within the routing matrix itself, whereas the BER and toneinjection test functions are performed in conjunction with the test subsystemdescribed in the Test Subsystem section below: this subsystem, available only onthe ML-2E1 and MLF-2E1 modules, generates the test signals (test tone or testsequence required for testing) and evaluates the received sequence, and therouting matrix routes the test subsystem input and output to the desired timeslots.

Link Interfaces

The functions of the link interfaces are as follows:

The transmit path of each interface generates the E1 frames in accordance

with the framing mode selected by the user, and prepares the resulting datastream for transmission.

The receive path recovers the receive signal and the associated clock.

The ML-2E1 and MLF-2E1 modules have two independent link interfaces, one foreach external main link.

In addition, the link interface collects performance diagnostic data (CRC-4 blockerror data or bipolar violations) in accordance with the applicable standards.

Bypass Relay (ML-2E1 only)

The bypass relay is used to interconnect directly the external lines connected tothe ML-2E1 module, in case the module is not powered. The purpose is to enablethe inband management traffic to pass, even if the module is not operative, andthus let the network management station take action to correct the problem, or atleast minimize its impact on the network traffic flow.

The bypass relay is an ordering option.

The bypass relay connects the transmit pair in one link connector to the receivepair in the other link connector, and vice versa. The connection is made onlybetween the RJ-45 connectors (used by the balanced interfaces).

Note

Note


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Note however that when very long links are used, the total attenuation of the linesconnected in series may exceed the maximum allowed, and thus the signal willnot pass.

Timing Subsystem

The timing subsystem performs the following main functions:

Generates the internal clock and timing signals required by the transmit path.These signals are locked to the Megaplex nodal timing.

Generates user-selected main and fallback clock signals, derived from therecovered E1 data streams, in accordance with the commands received fromthe CL module.

Provides an interface to the external (station) clock.

Local Management Subsystem

The local management subsystem performs two main functions:

Controls the operation of the various circuits located on the ML module inaccordance with the commands received from the CL module through theMegaplex management channel.

Controls the routing of management traffic through the main link interfaces, inaccordance with the management mode selected by the user for each mainlink interface.

E1 Link Interface Characteristics

Copper Interface Characteristics

The E1 link interfaces of the ML modules meet the applicable requirements ofITU-T Rec. G.703, G.704, G.706, G.732 and G.823.

The copper link interfaces use the HDB-3 line code. The modules support two lineinterfaces:

120 balanced line interface, terminated in an eight-pin RJ-45 connector. Thenominal balanced interface transmit level is 3V.

75 unbalanced interface, terminated in two 1.0/2.3 mm female coaxialconnectors. The nominal unbalanced interface transmit level is 2.37V.

Only one of these interfaces can be active at any time. The active interface of eachport can be selected by internal jumpers.

The E1 line interfaces have integral LTUs, which enable operation with lineattenuation up to 30 dB. The line interface can also emulate a DSU interface: in

this case, the maximum line attenuation is 12 dB.

Optical Main Link Interface Characteristics

The optical link interfaces fully emulate the operation of copper E1 link interfaces,including the use of an HDB-3-encoded optical signal, and AIS transmission.

A wide range of fiber optic interfaces complying with ITU-T Rec. G.921 and G.956is available for the MLF modules, to optimally meet a wide range of systemrequirements.


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The MLF modules can be ordered with fiber optic interfaces for operation over62.5/125 micron multi-mode fibers (typical attenuation of 3.5 dB/km), as well asover low-loss 9/125 micron single-mode fibers (typical attenuation of 0.4 dB/km at1310 nm, and 0.25 dB/km at 1550 nm). The optical interface is available with FC,SC or ST connectors, in accordance with order.

Table 1-5 provides information on the characteristics of the optical subsystem,

including the maximum range over typical fiber optic cable.

Table 1-5. Fiber Optic Interface Characteristics

Wavelength Fiber TypeTransmitter

Type

PowerCoupled

into Fiber

ReceiverSensitivity

MaximumReceiver

InputPower

ReceiverDynamicRange

TypicalMaximum

Range

850 nm62.5/125 mmultimode

Laser -18 dBm -38 dBm -10 dBm 28 dB 5 km (3 mi)

1310 nm9/125 m

single-modeLaser -12 dBm -40 dBm -12 dBm 28 dB 62 km (38 mi)

1550 nm 9/125 msingle-mode

Laser -12 dBm -40 dBm -12 dBm 28 dB 100 km (62 mi)

All the fiber optic interface options offer high performance and have a widedynamic range, which ensures that the receiver will not saturate even when usingshort fiber optic cables (saturation is caused when the optical power applied to thereceiver exceeds its maximum allowed input power, and results in very high biterror rates).

Framing

The ML modules support both G732N and G732S multiframes (2 or 16 frames permultiframe, respectively), in accordance with user's selection.

The ML link interfaces also supports the CRC-4 option, including the E bit, asspecified in ITU-T Rec. G.704, thereby allowing the carrier to monitor the links tothe Megaplex.

The framing mode and CRC-4 use are user-programmable, separately for each link.

Processing of Channel-Associated Signaling

The processing of signaling information for transmission through an E1 trunk isperformed by the ML modules. The ML modules support two types ofchannel-associated signaling modes:

Legacy channel-associated signaling (CAS) mode. In this mode, the user canspecify the following signaling format conversions:

Conversion of signaling information received through a main link, in orderto match the internal Megaplex signaling interpretation conventions.

Conversion of the internal signaling information to the format used by theequipment connected to Megaplex links.

Each link can use different receive and transmit translation rules. Thesetranslation rules are defined by means of signaling profiles.

A profile enables the user to select the translation of each individual signal bit.


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The available selections are A, B, C, D (value copied from the correspondingincoming bit), ~A, ~B, ~C, ~D (inverted value of corresponding incomingbit), 0 (always 0), and 1 (always 1).

In addition to the translation of individual bits, the receive path conversionsection can also be used to define the signaling bit patterns that indicate thebusy and idle states.

Use of R2 CAS signaling protocol. The selection between regular (legacy)channel-associated signaling and the R2 protocol is also made by means ofprofiles. As a result, each main link port can be configured to use either legacyCAS (with or without signaling conversion) or the R2 protocol.

Since the processing of the signaling information for transmission through theE1 trunk is performed by the main link module, any type of voice channel isable to use the R2 protocol for setting up calls, simply by being routed to thedesired timeslot of a main link port configured to use the R2 CAS protocol.

R2 Signaling Protocol

The R2 signaling protocol is a type of channel-associated signaling protocol for E1

trunks that enables the setting up, metering and disconnection of phone calls usingdecadic pulse dialing.

The user can specify, for each timeslot of a main link port using the R2 protocol,the call setup permissions: incoming, outgoing or both. This determines whetherthe subscriber connected to the corresponding voice channel can use the linefreely, or can only accept or only initiate calls.

When defining a profile for the R2 protocol, the user can select the type of link, toenable the protocol to adapt its delay parameters to the link delay:

Terrestrial link, with relatively low delay

Satellite link, with high delays.

In addition to selecting the link type, the user can let the Megaplex toautomatically select the appropriate default parameters, or can select manualconfiguration of R2 protocol parameters.

Although the basic R2 protocol is defined in ITU-T recommendations, national PTTadministrations often implement variations in accordance with their specificrequirements. To support these variations, the user can select among the followingpredefined R2 implementations:

One of these implementations matches the ITU-T Rec. Q.421 implementation

The other implementations are selected in accordance with national standards:

Argentina, Brazil (continuous and pulsed versions), India, Korea.In addition to these predefined selections, five sets of parameters are left for freeusers selection.


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Support for V5.1 Interfaces

Each E1 main link interface can be configured to support the V5.1 signalingprotocol for access nodes in accordance with ETSI 300 324-1.

This enables to use the ML modules to directly connect the Megaplex unit to E1ports of the local exchange that have been assigned by the exchange operator toserve these subscribers.

Two main types of subscribers are supported by the V5.1 protocol: PSTN(telephony) subscribers and ISDN subscribers. The various types of subscribers canbe connected to the ML module in two ways:

By direct connection to I/O channels of modules installed in the localMegaplex unit

By connecting them through legacy main links to the local Megaplex unit, andbypassing the required timeslots to the desired ML link configured for V5.1operation.

The V5.1 protocol enables providing the subscribers connected to the Megaplexunit with the same types of services and features that are available to subscribersdirectly connected to the exchange subscriber ports. For ISDN subscribers, thisalso includes the provision of semipermanent and permanent lines.

For additional details on V5.1 applications, capabilities and configuration, refer tothe Megaplex-2100 Installation and Operation Manual.

External (Station) Clock Interface Characteristics

The ML-1E1, ML-2E1 and MLF-1E1 modules include an external (station) clockinterface, which can be used to lock the nodal timing of the Megaplex to anexternal clock signal.

The external clock interface is terminated in a separate RJ-45 connector. The clockconnector includes the following inputs and outputs:

External clock input:

Balanced (120 ) or unbalanced (75 ) interface, which accepts a 2048 kHzall-ones AMI-coded clock signal. The interface type is user-selectable.

Squarewave clock input (RS-422 levels).

External clock outputs. Two outputs are provided:

Balanced (120 ) or unbalanced (75 ) interface, which outputs a2048 kHz AMI-coded clock signal. The interface type is user-selectable.

Squarewave clock output (RS-422 levels).These outputs provide a convenient means to distribute the external clocksignal by chaining the clock connectors of Megaplex units.


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Timing

The receive path of each ML main link port can use the clock signal recoveredfrom the corresponding received line signal.

The transmit path timing is derived from the nodal clock used by the Megaplex.The nodal clock source can be selected in accordance with system requirements,from one of the following options:

Internal clock

Clock derived from one of the received clock signals, using one of thefollowing methods:

Loopback timing (timing locked to the clock signal recovered from thereceive signal of a selected main link)

External timing (timing locked to the external (receive) clock supplied to aselected high-speed Megaplex data channel)

Station clock (available only for modules with external clock interface).

The main characteristics of each timing mode are explained below.

Internal Clock

The source for the internal timing signals is a crystal oscillator located in the ML

module, having an accuracy of30 parts per million (ppm). This accuracycorresponds to a Stratum 4 clock.

The internal timing mode can be used in point-to-point links and in independentnetworks. In any system, only one unit may operate with internal timing: all theother units must use loopback timing to ensure synchronization. In this way, theunit that operates with internal timing is the clock source and determines thetiming of the entire network.

Loopback Timing

With loopback timing, the main link transmit clock is locked to the receive clockderived from the receive data of the same port. The user can select the port to serveas the reference for the nodal clock of the Megaplex system.

This mode is recommended when the main link port is connected to a digitaltransmission network, e.g., the national network or a private carrier network, becausethis locks the timing reference of the Megaplex unit to the accurate timing sourceused by the network.

External Timing

In the external timing mode, the Megaplex nodal timing is synchronized to thereceive signal supplied to one of the high-speed data modules installed in the unit.The desired channel is selected by the network management station or supervisionterminal operator.

Station Clock

In the station clock mode, the Megaplex nodal timing is synchronized to the externalclock signal supplied to the external clock interface located on the ML-2E1, ML-1E1and MLF-1E1 modules.


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Redundancy

Redundancy Modes

The ML-2E1 and MLF-2E1 modules support redundancy at the module level, i.e.,the two ports of the module can be configured to operate as a redundant pair. Theswitching time between the main and backup ports is maximum 50 msec, and

therefore redundancy switching will not cause the disconnection of voice calls.

As an option, an additional ML module can be installed for each ML moduleinstalled in the chassis, to provide main link redundancy. The redundant modulecan be installed in any slot. The redundancy switching time between ports ondifferent modules is longer, but this redundancy configuration also protects againstfailure of common module circuits, e.g., failures of management circuits, etc.

Three different redundancy approaches are available:

Dual-Cable Redundancy (with parallel transmission). In this mode, anadditional main link port is configured to serve as a redundant port for the portto be protected. The redundant port is configured with basically the same

parameters as the primary port (there may be differences in some parametersrelated to the link physical configuration parameters).

Each port of the redundant pair is connected to a separate transmission pathand transmits the same information in parallel. Both ports process as usual thetransmit and receive signals, but the receive output of the redundant port is notconnected to the TDM buses. During normal operation, the operational stateof the redundant port is continuously monitored, to ensure that it is operatingO.K. If the primary link fails, the corresponding port is disconnected from theTDM buses, and the redundant port takes over.

Therefore, this redundancy configuration provides protection both in case oftransmission path failure, and technical failure in the main link module

hardware.

Y-Cable Redundancy (only for modules with copper interfaces). In thismode, the pair of redundant ports is connected in parallel to a commontransmission path. For this type of redundancy to be effective, the two portsmust be located on different modules. This mode provides protection mainlyagainst technical failures in the main link module hardware.

Ring Redundancy. Main link modules also support ring redundancy, a RADproprietary topology that provides higher availability for critical applications.This topology uses two transmission paths, each requiring a single twisted pairor a single optical fiber: therefore, ring redundancy can use the same cablinginfrastructure as a regular point-to-point link.

The two pairs or fibers form a closed dual-ring topology, similar to thatimplemented in SDH transmission networks: one path propagates dataclockwise and the other counterclockwise. Therefore, each Megaplex canreceive data through two different paths, and selects only the signal receivedthrough one of the paths for processing.

In case of failure, the failed segment is bypassed by using the second path.


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Test Subsystem (ML-2E1 and MLF-2E1 only)

The test subsystem is used to check the transmission performance and properoperation of the Megaplex system paths carrying the users payload, withoutrequiring any external test equipment. Accordingly, the test subsystem includestwo main functions: a BER test subsystem for evaluating data signal paths and atone injection subsystem for testing audio (voice) signal paths.

BER Test Subsystem

The BER test subsystem comprises a test sequence generator and a test sequenceevaluator. During the test, the payload data is replaced by a pseudo-randomsequence generated by the test sequence generator. Many types of test sequencescan be generated, enabling the user to select the one best suited for each specifictest. The available selections are:

QRSS test sequence per ITU-T Rec. O.151

Pseudo-random sequences per ITU-T Rec. O.151: 215-1, 220-1, 223-1

2047-bit long pseudo-random sequence per ITU-T Rec. O.152/3

511-bit long pseudo-random sequence per ITU-T Rec. O.153

63-bit long pseudo-random sequence

Repetitive patterns of one mark (1) followed by seven spaces (0) (1M-7S);one space followed by seven marks (1S-7M); alternating marks and spaces(ALT); continuous mark (MARK), or continuous space (SPACE).

The transmitted data is returned to the test sequence evaluator by a loopbackactivated somewhere along the signal path.

The evaluator synchronizes to the incoming sequence, and then compares thereceived data, bit by bit, to the original data sequence and detects any difference(bit error).

When two ML modules are operated in a link, it is also possible to perform the testby activating the BER test subsystems at both ends of the link at the same time andconfiguring both subsystems to use the same test sequence. In this case, it is notnecessary to activate a loopback, because the BER test subsystem can process thesequence transmitted by the far end subsystem in the same way as its ownsequence.This avoids the need to activate a loopback when the loopback itself may alter theoperating conditions on the tested path (for example, in certain cases a loopbackmay cause switching to an alternate clock source and thus affect the flow of timinginformation within the network).

The test results are displayed as a number in the range of 0 (no errors detectedduring the current measurement interval) through 63535. If the upper limit isreached, the counter stops accumulating errors and retains this maximum valueuntil it is manually reset.

Error counts are accumulated starting from the activation of the BER test, or fromthe last clearing (resetting) of the error counters. During normal operation, noerrors should be detected.

Note


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To provide meaningful results even under marginal transmission conditions, errorcounting is automatically interrupted while the test evaluator is not synchronizedto the incoming test sequence, and also during periods in which the tested signalpath is not available (for example, during AIS reception, loss of signal and/or loss offrame alignment). The number of seconds during which error counting isinterrupted is reported along with the accumulated test running time.

To check that the tested path is live, the user can inject errors at a desired(calibrated) rate in the test sequence. The available error injection rates are 10 -1,10-2, 10-3, 10-4, 10-5, 10-6 and 10-7; single errors can also be injected. These errorswill be counted as regular errors by the test sequence evaluator, thereby increasingthe users confidence in the measured performance.

The BER test subsystem input and output are routed by means of the ML routingmatrix. Therefore, the user can request testing in any individual timeslot or bundleof timeslots. For timeslots with split assignment, it is also possible to select the bitson which the test is performed (with the same resolution as the split timeslotassignment, that is, pairs of consecutive bits).

Moreover, the direction in which the test sequence is sent (local or remote) canalso be selected.

Another convenient function, which is available when performing tests andloopbacks on individual timeslots, is automatic configuration of the same test onthe redundancy partner, without requiring any manual intervention.

At any time, only one BER test can be performed on each ML module.

Test Tone Injection Subsystem

The test tone is a data sequence repeating at a rate of 1 kHz. This data sequence isidentical to the data sequence that would have been generated if a 1-kHz signal

having a nominal level of 1 mW (0 dBm0) were applied to the input of thetransmit path of an ITU-T Rec. G.711 voice channel codec (that is, a PCM codecusing the A-law).

The receive path of a voice channel codec receiving the test tone sequenceconverts it to the corresponding analog signal. The resulting 1-kHz tone can beheard in the earpiece of a telephone set connected to the tested channelalternately, its level can be measured by a standard audio analyzer).

The output signal of the test tone injection subsystem is also routed by means ofthe ML routing matrix. Therefore, the user can select the timeslot in which the testtone is injected (only one timeslot at a time), and the direction in which the testtone is sent (local or remote).

Diagnostics

The ML module panel includes indicators that display the status of each lineinterface (loss of local and remote synchronization and activation of loopbacks),and the presence of alarms in the module.

In addition, each ML module interface includes an on-line indicator, which is usedto indicate the active link: the on-line indicator of the standby port of a redundantpair flashes.


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The ML module includes self-test upon power-up, and additional testing anddiagnostic functions that can be controlled by the operator using Megaplex systemmanagement. The testing capabilities include:

Local main link loopback (where the main link transmit signal is looped backto the input of the main link receive path).

Remote main link loopback (toward the remote Megaplex).

Local and remote loopbacks can also be activated on individual timeslots, or onbundles of user-selected timeslots.

The ML modules support the collection of performance diagnostics using theCRC-4 function. The collected performance data is similar to the requirements ofAT&T Pub. 54016.


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Technical Specifications 1-19

1.4 Technical Specifications

ML-2E1, MLF-2E1 TwoNumber of Links

ML-1E1, MLF-1E1 One

Type and Bit Rate E1, 2.048 Mbps

Line Interface 4-wire, 120 balanced

Coax, 75 unbalanced

Line Code HDB3

Standards Compliance ITU-T Rec. G.703, G704, G.732

Copper Line

InterfaceCharacteristics(ML-2E1, ML-1E1)

Framing G.732N and G732S with or without CRC-4per ITU-T Rec. G.703, G.704, G.732

Signaling Support Legacy CAS

R2 signaling protocol

V5.1 signaling protocol

Transmit Level 3V 10%, balanced

2.37V 10%, unbalanced

Receive Level 0 through -12 dB for low sensitivity

0 through -30 dB for high sensitivity

Jitter Performance Per ITU-T Rec. G.823

Surge Protection Per ITU-T Rec. K.21

Connectors (per link) Balanced Interface: RJ-45

Unbalanced Interface: 1.0/2.3 mm femalecoaxial (mini BNC) connectors

Type and Bit Rate E1, 2.048 Mbps

Standards Compliance ITU-T Rec. G.703, G704, G.732

Optical Performance Refer to Table 1-5

Line Code HDB3

Framing G.732N and G732S with or without CRC-4,per ITU-T Rec. G.703, G.704, G.732

Optical LineInterfaceCharacteristics(MLF-2E1,MLF-1E1)

Signaling Support Legacy CAS

R2 signaling protocol

V5.1 signaling protocol

Connectors (per link) FC, SC or ST connectors, in accordance withorder

Jitter Performance Per ITU-T Rec. G.823

Surge Protection ITU-T Rec. K.21


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1-20 Technical Specifications

Internal Oscillator 30 ppmTiming

Allowed Clock Range inLoopback, External, andStation Clock Modes

130 ppm

Interface 2048 kHz, ITU-T Rec. G.703 balanced or

unbalanced interface (input and output) 2048 kHz squarewave input and output

(RS-422 levels)

External (Station)

Clock Interface(ML-2E1, ML-1E1and MLF-1E1)

Connector RJ-45

Diagnostics Port Loopbacks Local loopback on each module port

Remote loopback on each module port

Port Tests (ML-2E1 andMLF-2E1 only)

Local BER test toward local side

Remote BER test toward remote side

Timeslot Loopbacks Local loopback Remote loopback

Timeslot Tests (ML-2E1and MLF-2E1 only)


Local test tone injection toward local side


Remote test tone injection toward remote side

Split Timeslot Tests(ML-2E1 and MLF-2E1only)



Indicators Per Module Alarm

For each Link On-line, test, local sync loss and remote sync loss

Configuration Programmable via Megaplex management system


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General 2-1

Chapter 2

Module Installation and

Operation

2.1 General

This Chapter provides installation, configuration and operation instructions for theML modules.

The information presented in this Chapter supplements the Megaplex-2100

installation, configuration and operation instructions contained in theMegaplex-2100 Installation and Operation Manual.

Before performing any internal settings, adjustment, maintenance, or repairs,first disconnect all the cables from the module, and then remove the modulefrom the Megaplex enclosure.No internal settings, adjustment, maintenance, and repairs may be performedby either the operator or the user; such activities may be performed only by askilled technician who is aware of the hazards involved.Always observe standard safety precautions during installation, operation, andmaintenance of this product.



Do not attempt to adjust the laser drive current.

The use of optical instruments with this product will increase eye hazard.Laser power up to 1 mW at 1310 nm and 1550 nm could be collected by anoptical instrument.

Use of controls or adjustment or performing procedures other than thosespecified herein may result in hazardous radiation exposure.

The ML and MLF modules contain components sensitive to electrostatic discharge(ESD). To prevent ESD damage, always hold the module by its sides, and do nottouch the module components or connectors.

Warning

Caution

Warning


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Chapter 2 Module Installation and Operation ML/MLF Installation and Operation Manual

2-2 Preparation for Installation

2.2 Preparation for Installation

The operating mode of the ML modules is controlled by software.

In addition, there are several jumpers that select the hardware operating mode,and these may have to be set before installing a module in the Megaplex

enclosure.For MLF-2E1 modules, you may skip directly to Section 2.3.

ML-2E1 Internal Settings

Figure 2-1 shows the location of the internal jumpers located on the ML-2E1module. Table 2-1 describes the jumper functions, and lists the factory (default)settings. If the default settings meet your specific requirements, you may skip thissection and proceed with the installation of the module in the equipmentenclosure, as explained in Section 2.3.

In addition to the user-selectable jumpers, the ML-2E1 module includes additional

jumpers that are preset by the manufacturer and must not be moved.

Table 2-1. ML-2E1 Module Internal Jumpers

Jumper Function

Jumper ST CLK JP8 Selects the clock waveform accepted by the receive path of the station clockinterface:

NORM Normal all-ones AMI signal.

SQR Square wave signal.

Default setting: NORM

Jumpers JP14, JP15, JP16,JP31, JP32

Selects the station clock interface available in the CLOCK RJ-45 connector:

BAL 120-ohm balanced interface.

UNBAL 75-ohm unbalanced interface.

Default setting: BAL

Link Interface

Link 1: JP17, JP21, JP23,JP25, JP27, JP29,JP30

Link 2: JP18, JP22, JP24,

JP26, JP28, JP34,JP36

Each group of jumpers selects the corresponding main link interface:

BAL 120-ohm balanced interface. When using this interface, connect themain link cable to the corresponding RJ-45 connector.

UNBAL 75-ohm unbalanced interface. When using this interface, connect themain link cables to the corresponding pair of 1.0/2.3 mm female

coaxial connectors.

Default setting: BAL

Jumper ST PIN6 FGND JP37 Controls the connection of the frame ground to pin 6 in the station clockconnector:

YES Connected.

NO Not connected.

Default setting: NO

Note


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ML/MLF Installation and Operation Manual Chapter 2 Module Installation and Operation

Preparation for Installation 2-3

Table 2-1. ML-2E1 Module Internal Jumpers (Cont.)

Jumper Function

Jumper FGND3,6

Link 1: JP35

Link 2: JP33

Controls the connection of the frame ground to pins 3, 6 in the correspondingRJ-45 main link connector:

YES Connected.

NO Not connected.

Default setting: NO

Pins 3,6 of RJ-45

Connector of Link 1

not Connected to

Frame GroundNO

YES


Pins 3,6 of RJ-45Connector of Link 1

Connected to

Frame Ground

NORM

SQR

Station Clock Input


Normal

AMI Signal

Squarewave

Signal

Link 1 Jumpers

Link 2 Jumpers


JP29

JP35

JP30

CH1

FGND3, 6

JP37

Link 1 Interface

JP17, JP21, JP23, JP25, JP27, JP29, JP30

120

Balanced

BAL

JP29

JP30

75

UnbalancedUNBAL

BAL

UNBAL

JP1

7

JP2

1

JP2

3

JP2

5

JP2

7

JP17

JP21

JP23

JP25

JP27

JP29

JP30

Link 2 InterfaceJP18, JP22, JP24, JP26,

JP28, JP34, JP36

Settings same as detailedfor Link 1 Interface

Pins 3,6 of RJ-45

Connector of Link 2

not Connected to

Frame Ground

NO

YES

Pins 3,6 of RJ-45

Connector of Link 2

Connected to

Frame Ground


JP8

ST CLK

JP17

JP21

JP23

JP25

JP27

JP33

JP34

JP36

CH2 FGND3, 6

JP18

JP22

JP24

JP26

JP28

JP31

JP32

JP14

JP16

JP15


JP14, JP15, JP16, JP31, JP32

75

Unbalanced

BAL

JP31

JP32

JP14

JP15

JP16

JP14

JP15

JP16

UNBALJP31

JP32


Pin 6 of CLOCK

Connector

Connected to

Frame Ground

YES

Pin 6 of CLOCK

Connector not

Connected to

Frame GroundNO

BAL

UNBAL

120

Balanced

Figure 2-1. ML-2E1 Module, Internal Jumpers

ML-1E1 Internal Settings

Figure 2-2 shows the location of the internal jumpers located on the ML-1E1module. The functions of these jumpers is as explained in Table 2-1.Table 2-1 alsolists the factory (default) settings.


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2-4 Preparation for Installation

If the default settings meet your specific requirements, you may skip this sectionand proceed with the installation of the module in the equipment enclosure, asexplained in Section 2.3.

In addition to the user-selectable jumpers, the ML-1E1 module includes additionaljumpers that are preset by the manufacturer and must not be moved.

Pins 3,6 of RJ-45

Connector of Link 1

not Connected to

Frame GroundNO

YES


Pins 3,6 of RJ-45

Connector of Link 1

Connected to

Frame Ground

NORM

SQR

Station Clock Input


Normal

AMI Signal

Squarewave

Signal

Link 1 Jumpers


JP29

JP35

JP30

CH1

FGND3, 6

Link 1 Interface

JP17, JP21, JP23, JP25, JP27, JP29, JP30

120

Balanced

BAL

JP29

JP30

75

UnbalancedUNBAL

BAL

UNBAL

JP17

JP21

JP23

JP25

JP27

JP17

JP21

JP23

JP25

JP27

JP29

JP30

JP8

ST CLK

JP17

JP21

JP23

JP25

JP27

JP31

JP32

JP14

JP16

JP15


JP14, JP15, JP16, JP31, JP32

75

Unbalanced

BAL

JP31

JP32

JP14

JP15

JP16

JP14

JP15

JP16

UNBALJP31

JP32

BAL

UNBAL

120

Balanced

JP37


Pin 6 of CLOCK

Connector

Connected to

Frame Ground

YES

Pin 6 of CLOCK

Connector not

Connected to

Frame GroundNO

Figure 2-2. ML-1E1 Module, Internal Jumpers

MLF-1E1 Internal Settings

Figure 2-3 shows the location of the internal jumpers located on the MLF-1E1module. The functions of these jumpers is as explained in Table 2-1.Table 2-1 alsolists the factory (default) settings.

If the default setting meets your specific requirements, you may skip this sectionand proceed with the installation of the module in the equipment enclosure, asexplained in Section 2.3.

In addition to the user-selectable jumpers, the MLF module includes additionaljumpers that are preset by the manufacturer and must not be moved.


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Module Installation 2-5

JP37

JP31

JP32

JP8

ST CLK

NORM

SQR

Station Clock Input


Normal

AMI Signal

Squarewave

Signal

JP14

JP16

JP15

Pin 6 of CLOCK

Connector

Connected to

Frame Ground

Jumper JP37 ST PIN6

YES

Pin 6 of CLOCKConnector not

Connected to

Frame GroundNO


JP14, JP15, JP16, JP31, JP32

75

Unbalanced

100

BalancedBAL

JP31

JP32

JP1

4

JP1

5

JP1

6

JP14

JP15

JP16

UNBAL

JP31

JP32

Figure 2-3. Typical MLF-1E1 Module, Internal Jumper

2.3 Module Installation

The ML modules can be installed in an operating chassis (hot insertion).

For general installation procedures and safety instructions, refer to theMegaplex-2100 Installation and Operation Manual.

When the Megaplex chassis must include both E1 main link modules and T1 mainlink modules, always install at least one E1 main link module to the left of the T1main link modules.For example, in a Megaplex-2100, when T1 main link modules are installed in I/Oslots 5 and 6, install at least one E1 main link module in I/O slots 1 to 4.

Insert the ML module in the prescribed I/O slot and fasten it with its two screws.

When redundancy is used, an additional ML module can be installed for each MLmodule. The redundant module can be installed in any I/O slot.

Note


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2-6 Cable Connections

2.4 Cable Connections

Connection Data

This section provides connection data for the ML modules.

Main Link Connection Data Copper Line Interface

Each ML port with copper line interface has three connectors:

One RJ-45 eight-pin connector, for the balanced interface. Connector wiring islisted in Table 2-2.

Two 1.0/2.3 mm female coaxial (mini BNC) connectors, designated OUT andIN, respectively, for the unbalanced interface.

A CBL-MINIBNC-BNC adapter cable is available from RAD for converting each1.0/2.3 mm female coaxial connector to standard BNC coax interface.

Table 2-2. RJ-45 Balanced Main Link Connector, Pin Functions

Pin Direction Function

1 Input Receive Data (ring)

2 Input Receive Data (tip)

3 Frame Ground

4 Output Transmit Data (ring)

5 Output Transmit Data (tip)

6 Frame Ground (connection controlled by internal jumper)

7, 8 N/A Not connected

Clock Connection Data ML-2E1, ML-1E1 and MLF-1E1

The CLOCK connector is an RJ-45 connector, wired in accordance with Table 2-3.

Table 2-3. CLOCK Connector, Pin Functions

Pin Direction Function

1 Input AMI Clock In (ring)/Square Clock Signal In (wire +) (NOTE)

2 Input AMI Clock In (tip)/Square Clock Signal In (wire -) (NOTE)

3 Signal Ground (connection controlled by internal jumper)

4 Output AMI Clock Out (ring)5 Output AMI Clock Out (tip)

6 Frame Ground (connection controlled by internal jumper)

7 Output Square Clock Signal Out (wire +)

8 Output Square Clock Signal Out (wire -)

The type of input clock signal accepted by this interface is selected by means of aninternal jumper (Section 2.2).

Note


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Cable Connections 2-7

Connection Instructions

Before starting, refer to the installation plan to determine the cables intended forconnection to the enclosure.

Modules with Copper Line Interfaces

1. Connect the cables to the prescribed connectors on the module panel.

You can connect either to the RJ-45 connector or to the coaxial connectors, inaccordance with the link interface type selected by means of the internalsettings.Never connect cables to both interfaces of a given link.

When connecting cables to the coaxial connectors, pay attention to correctconnection:

Connect the transmit cable to the OUT connector

Connect the receive cable to the IN connector.

2. If necessary, connect the external (station) clock cable to the CLOCKconnector.

3. When the optional main link redundancy function is used, connect regularcables to each module of a redundant pair as usual.

Modules with Optical Interfaces



The use of optical instruments with this product will increase eye hazard.Laser power up to 1 mW could be collected by an optical instrument.

1. Connect the cables to the prescribed connectors on the module panel:

Connect the transmit cable to the TX connector

Connect the receive cable to the RX connector.

Before connecting, clean the optical connectors using an approved solvent,and dry thoroughly using optical tissue. Avoid sharp bends and twisting of thefiber optic cables.

2. If necessary, for MLF-1E1 modules, connect the external (station) clock cableto the CLOCK connector.

3. When the optional main link redundancy function is used, connect regular

cables to each module of a redundant pair as usual.

Warning


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2-8 Normal Indications

2.5 Normal Indications

Module Status Indication

When an ML main link interface is operational, its ALARM indicator must be off.

Link Status Indications

The status of each ML link is indicated by a separate set of indicators. The normalindications for an operational link interface are as follows:

The ON-LINE indicator of an active link must light steadily; if an additionalmodule is used (redundant pair), the corresponding ON-LINE indicator flashes.

The TST indicator must be off, but may turn on when a test loop is activatedon the corresponding link interface.

If the other communication equipment on the link is not yet operative, thecorresponding LOC S. LOSS and/or REM S. LOSS indicator may light. Theseindicators must turn off as soon as the link with the remote equipment isestablished.


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Preliminary Configuration 3-1

Chapter 3

Configuration Instructions

3.1 General

This Chapter provides specific configuration information for ML modules.

The configuration activities are performed by means of the management systemused to control the Megaplex unit. The instructions appearing in this Chapterassume that you are familiar with the management system being used:

Supervision terminal or Telnet (covered by the Megaplex-2100 Installation and

Operation Manual). Network management system, e.g., the RADview network management system

(refer to the RADview User's Manual for instructions).

For general instructions and additional configuration procedures, refer toChapter5, Chapter 7 andAppendix Fof the Megaplex-2100 Installation andOperation Manual. You will also find relevant background information inAppendix E of that manual.

3.2 Preliminary Configuration

Outline of Preliminary Configuration

Before starting the configuration procedure of a new ML module, perform thefollowing preliminary steps:

1. Include the ML module into the database, using the DEF SYS command. Thisstep is necessary only if the module is not yet installed in the Megaplex. Itspurpose is to allow preprogramming the module parameters, so that when themodule is installed in the enclosure, it will immediately start operating inaccordance with the desired parameters. This activity is performed by meansof the DEF SYS command.

2. Select the Megaplex operating mode. This activity is also performed by meansof the DEF SYS command.

Selecting the Megaplex Operating Mode

The selection of the Megaplex operating mode is made after the desired moduletypes are selected on the first page of the DEF SYS command.


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Chapter 3 Configuration Instructions ML/MLF Installation and Operation Manual

3-2 ML Configuration Instructions Legacy Mode

Pressing after ending the selections in the first part displays the secondpart of the system parameters definition form, which is used to enable/disable theuse of the V5.2 protocol.

To use the Megaplex in the legacy and/or V5.1 mode, the V5.2 APP parametermust be NONE, therefore you can simply confirm the default parameters bypressing.

V5.2 APP Interface ID Startup Mode Reprovision- - - - - - - - - - - - - - - - - - - - - - - - -

NONE N/A N/A N/A

To use the Megaplex in the V5.2 mode, refer to the ML-1E1/V5.2, ML-2E1/V5.2Installation and Operation Manual.

3.3 ML Configuration Instructions Legacy Mode

Outline of Configuration Procedure for Legacy Mode

To configure a ML module for operating in the legacy mode:

1. Configure the module port parameters using the DEF CH SS:* command.

2. When necessary, modify the system timing reference using the DEF SYScommand.

3. Configure timeslot utilization for each module port using the DEF TS and DEFSPLIT TS commands.

Before configuring the ML module, it is necessary to define the appropriate signalingprofiles, using the DEF PROFILE command.

E1 Port Parameters Legacy Mode

To define the parameters of the desired E1 port, type:DEF CH SS:CC

where SS is the module slot number, and CC is the desired port number.

Table 3-1 lists the E1 port parameters for the legacy mode.

Table 3-1. E1 Port Parameters Legacy Mode

Parameter Function Values

Service Selects the port service mode SelectLEGACY.

Default: LEGACY

Logical Link ID Not applicable to ports operatingin the legacy mode

Always N/Aand cannot be changed.

Default: N/A

Note

Note


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ML/MLF Installation and Operation Manual Chapter 3 Configuration Instructions

ML Configuration Instructions Legacy Mode 3-3

Table 3-1. E1 Port Parameters Legacy Mode (Cont.)

Parameter Function Values

Interface ID Used to select the V5.1INTERFACE ID number

In the legacy mode, this field is not used and thereforeit is set to N/A.

Default: N/A

Startup mode Used to select the V5.1 interfacerestart mode


Default: N/A

Reprovision Used to enable/disable the use ofreprovisioning under the controlof the local exchange when theV5.1 mode is used


Default: N/A

Connect Determines whether the E1 portis connected to an internal bus

YES E1 port is connected.

NO E1 port is disconnected. You can still programthe desired parameters, so the E1 port will be

ready to operate when needed.

Default: NO

Frame Determines the framing mode forthis E1 port.

Whenever possible, select aframing mode which supports theCRC-4 mode. This enables thecollection of performancediagnostic data.

Always configure the same value

on both ports of a redundant pair

G.732N 256N multiframe per ITU-T Rec.G.704 (2 frames per multiframe),CRC-4 function disabled.

G.732N-CRC4 256N multiframe per ITU-T Rec.G.704 (2 frames per multiframe),CRC-4 function enabled.

G.732S 256S multiframe per ITU-T Rec. G.704(16 frames per multiframe), CRC-4function disabled.

G.732S-CRC4 256S multiframe per ITU-T Rec. G.704(16 frames per multiframe), CRC-4function enabled.

Default: G.732S

Sig. Profile Selects the signaling profile thatspecifies the interpretation of thesignaling information transmittedand received by thecorresponding link.

The number of the profileappears in brackets, after theoptional profile name.

The signaling profiles and theirnames are defined by means of

the DEF PROFILE command

The available range is 1 through 5.

Default: 1

Idle Code Selects the code transmitted to fillidle (unused) timeslots in theframes transmitted through thislink

The available selections are 00 to FF (hexa).

Default: FF


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Cha

Documents

Manual de Instalación y Operación de los Modulos ML+MLF-2e