ACM2

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NTC C33843001PE_00 Copyright Nokia Telecommunications Oy

ACM2 V5.1

ACCESS MULTIPLEXER, V5.1 InterfaceSystem Release C3.2 RUS/RUS

Operating Manual

Volume 1/2

C33843.20 A0

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ACM2 V5.1 Operating Manual

NTC C33843001PE_00 Copyright Nokia Telecommunications Oyii

The following products comply with the protection requirements of the European Union Council Directive89/336/EEC relating to electromagnetic compatibility (EMC), provided that installed using EMC-compatibleinstallation practices (installation in mechanical housings stated to be EMC-compatible and using cabling material[at least as well shielded] and practices as stated in relevant Nokia Telecommunications user manuals):

Product code Product name Release

ACM2 V5.1 Access Multiplexer, V5.1 Interface C3.2 QA

COPYRIGHT Nokia Telecommunications Oy 1999All rights reserved.

No part of this publication may be copied, distributed, transmitted, transcribed, stored in a retrieval system, or translated intoany human or computer language without the prior written permission of Nokia Telecommunications Oy.

The manufacturer has made every effort to ensure that the instructions contained in the documents are adequate and freeof errors and omissions. The manufacturer will, if necessary, explain issues which may not be covered by the documents.The manufacturer’s liability for any errors in the documents is limited to the correction of errors and the aforementionedadvisory services.

The documents have been prepared to be used by professional and properly trained personnel, and the customer assumesfull responsibility when using them.The manufacturer welcomes customer comments as part of the process of continualdevelopment and improvement of the documentation in the best way possible from the user’s viewpoint. Please submit yourcomments to the nearest Nokia sales representative.

NOKIA is a registered trademark of Nokia Corporation.

Any other trademarks mentioned in the documents are the property of their respective owners.

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NTC C33843001PE_00 Copyright Nokia Telecommunications Oy iii

Document History

Document Date Comment

C33843001PE_00 16 Sep 1999 This manual is valid for ACM2 V5.1 System

Release C3.2

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Contents

Volume 1/2

1 Guide to Documentation C33843003SE_00

2 System Release Documents

2.1 Guide to System Release C33843004SE_00

2.2 System Release Item List A251 C3.2 QA

3 Product Description

3.1 ACM2 V5.1 Product Description C33579010SE_00

3.2 MCU Product Description C33369002SE_A0

3.3 LTM Product Description C33579005SE_00

3.4 SUB Product Description C33570005SE_00

3.5 ISDN S/T-if Product Description C33429004SE_02

3.6 ISDN U-if 8-ch 2B1Q Product Description C33491009SE_00

3.7 ISDN U-if 4-ch Product Description C33410002SE_02

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NTC C33843001PE_00 Copyright Nokia Telecommunications Oyvi

Volume 2/2 C33843002LE_00

InstallationCommissioning and Maintenance

Service Menu Reference

Signalling Description

Glossary

Index

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NTC C33843003SE_00 Copyright Nokia Telecommunications Oy 1

ACM2 V5.1

ACCESS MULTIPLEXER, V5.1 Interface

System Release C3.2 RUS/RUS

Guide to Documentation

16 September 1999

1 Introduction

This document provides information on how to use the ACM2 V5 user documentsand how to order the manuals.

1.1 About ACM2 V5.1

The ACM2 V5.1 Access Multiplexer is a Nokia 2048 kbit/s primary multiplexerwith special design emphasis on access network applications. The ACM2 V5.1system release C3.2 provides both ISDN S/T- and ISDN U-interfaces, basic POTSsubscriber interfaces, DYNACARD interfaces for leased line applications, and aV5.1 interface to Local Exchange (LE).

1.2 Your comments

We are interested to know whether our manuals provide all the information youwant. If you have any comments on this or any other manual, please, submit yourcomments to the nearest Nokia sales representative.

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ACM2 V5.1 Guide to Documentation

NTC C33843003SE_00 Copyright Nokia Telecommunications Oy2

2 Order codes for manuals and documents

The following table lists all the ACM2 V5.1 specific manuals. For a list of manuals for ACM2-compatible products, see Chapter 4.

Manual name Order code

ACM2 V5.1 Access Multiplexer, System Release C3.2RUS/RUS, Operating Manual

C33843.20 (English)

ACM2 V5.1 Product Overview C33491.21 (English)

ACM2 V5 Node Manager C3.2 User ’s Manual 1) C33580.20 (English)

ACM2 V5 Node Manager Product Overview C33479.21 (English)

ACCMUX CD-ROM C33463.92 (English)

1) An electronic version of the User’s Manual is included in ACM2 V5 Node Manager.

Table 1 Order codes for manuals and documents

3 Contents of documents

The ACM2 V5.1 Operating Manual and ACM2 V5 Node Manager User’s Manualare intended for the actual users of the equipment, whereas the ACM2 V5.1Product Overview and ACM2 V5 Node Manager Product Overview areintroductory documents describing the general features of the products.

3.1 ACM2 V5.1 Operating Manual

This manual provides the information and instructions required for installing,commissioning and operating ACM2 V5.1 nodes.

The manual consists of two volumes. The contents of the volumes are describedbelow.

Volume 1 contains the following documents:

system release documents product descriptions

Volume 2 contains the following documents:

installation instructions commissioning and maintenance instructions service menu reference documents signalling description glossary and index for both volumes.

In the following, each document type is described in more detail. The partnumbers given in parentheses refer to the numbering of the ACM2 V5.1 Operating

Manual contents.

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Note The DYNACARD units have their own operating handbooks. SeeChapter 4.

System release documents (Volume 1, parts 2.1 and 2.2)

Guide to System Release describes briefly the main features of the ACM2 and listssome features that require special consideration.

The System Release Item List shows the latest product releases and compatibilityinformation. The ACM2 products are under continuous development and onlyproducts belonging to the same system release are guaranteed to be compatible.

Product descriptions (Volume 1, parts 3.1 - 3.7)

The equipment-level ACM2 V5.1 Product Description (3.1) gives an overview of the ACM2 V5.1 Access Multiplexer. It describes the operation and structure of theACM2 equipment at a general level. The document also introduces the plug-in

units and the Line Test Module of which the different ACM2 applications arecomprised.

The equipment-level description covers the following information:

main functions of the entire equipment equipment configuration alternatives and different applications transmission and alarm management construction practice and power supply alternatives.

The ACM2 plug-in units and the Line Test Module have their own productdescriptions (parts 3.2 - 3.7), which describe the main functions of each unit and

also provide the technical data of external interfaces.The subracks, cartridges and power supplies have their own, separate, installationmanuals and operating manuals.

Installation instructions (Volume 2, parts 1.1 - 1.7)

The ACM2 V5.1 Installation document (1.1) provides general guidelines for theinstallation of the overall ACM2 equipment. For instance, it contains some check lists that apply in installation of all ACM2 plug-in units. Instructions for installingthe ACM2 into 20 T or 40 T cartridges are also included in this document.

Each ACM2 plug-in unit and the Line Test Module have also a unit-specific

installation document (parts 1.2 - 1.7). These documents show the pinconfiguration of front connectors and give instructions for cabling. If the unit has

jumpers, the correct jumper settings are also shown.

The subracks, cartridges and power supply alternatives have their own manuals,which provide instructions on assembling units into subracks, power feeding andcabling. The recommendations for cables and connectors to be used are alsoincluded.

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Commissioning and maintenance instructions(Volume 2, parts 2.1 - 2.7)

The instructions cover the following information:

commissioning equipment start-up defining identifications and settings

maintenance adding and replacing plug-in units alarm management tests and measurements, for example loopbacks.

The ACM2 V5.1 Commissioning and Maintenance document (2.1) describes howa new node is brought into use and shows the correct procedures for adding andremoving units. (Commissioning instructions deal with software-configurableparameters only; any necessary hardware configuration should be carried out

prior to commissioning.) This document also lists all state and fault messages thatmay be generated by the ACM2 and briefly describes the conditions that may havecaused the message.

Further, each plug-in unit and the Line Test Module has separate instructions(parts 2.2 - 2.7), which describe the commissioning of the unit concerned.

The command strings given in the instructions and examples are for ServiceTerminal (and Macro STE), but the same settings can also be made using ACM2V5 Node Manager.

Service menu reference sections (Volume 2, parts 3.1 - 3.6)

These documents list and describe all service menus available for a selected unitwhen accessed via a Service Terminal or Macro STE. The menus are introduced inthe same order in which they appear in the menu structure of the software.

A corresponding description of the ACM2 V5 Node Manager windows andcommands can be found in Chapter ‘Reference’ of the ACM2 V5 Node Manager User ’s Manual.

Signalling description (Volume 2, part 4)

This document describes the operation of the PSTN signalling (for instance, theprinciple of state transitions during a call).

Glossary (Volume 2, part 5)

This document lists the abbreviations, terms and definitions used in the OperatingManual.

Index (Volume 2, part 6)

To make the use of the Operating Manual easier, an index that covers both volumesof the manual is included in Volume 2.

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3.2 ACM2 V5 Node Manager Product Overview

The document is intended for everyone who wants to get an overview of thefeatures and operation of ACM2 V5 Node Manager. This document is not related

to any specific system release of the ACM2, but describes the general features of ACM2 V5 Node Manager.

3.3 ACM2 V5 Node Manager User’s Manual

The manual is intended for the actual users of ACM2 V5 Node Manager. Itprovides all the information you need to install and start using Node Manager. Italso gives instructions for performing some most frequently needed operations,such as copying settings from one node to another.

The User’s Manual contains the following information:

installation instructions for the manager software instructions for creating a connection to a node basic procedures of ACM2 V5 Node Manager a detailed reference section describing all manager windows and commands

available.

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4 Related documents

The following documents are not included in this manual but may be of use duringthe installation, commissioning and operation of the ACM2 V5.1.

Manual name Order code

TC 21700 Service Terminal, Operating Handbook C33004.20

TM4 Construction Practice, Operating Handbook C33007.20

DYNANET Subrack 17-slot, Installation Manual C33424.20

DYNANET Subrack 12-slot, Installation Manual C33424.21

Subrack Power Adapter for 17-slot DYNANET Subrack, OperatingManual

C33425.20

Enhanced Power Supply Adapter, Operating Instructions C33387.20DC-PSA, Operating Instructions C33470.20

CU 24012/24013 Data Interface Unit, Operating Handbook C33124.20

TU 21132.11 ILT/ISDN, Operating Manual C33255.21

TU 21120 Data Interface Unit, Operating Handbook C33036.20

TU 21122.5 Data Interface Unit, Operating Handbook C33079.20

TU 21122.6 Data Interface Unit, Operating Handbook C33081.20

TU 21124 Data Interface Unit, Operating Handbook C33028.20

ILT1M Integrated Line Terminal, Operating Manual C33601.02

ETSI Rack, Installation Instructions C33472.20

Table 2 Related documents

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ACM2 V5.1


System Release C3.2 RUS/RUS

Guide to System Release

16 Septemeber 1999

1 About system release

This document describes the main functions and services available in systemrelease C3.2 for Russia with national mapping.

ACM2 products are under continuous development and have been included insystem releases so that it would be possible to indicate and manage thecompatibility of different ACM2 products.

1.1 System Release Item List

The System Release Item List shows ACM2 products that are guaranteed to be

compatible within system release C3.2.

If the item list contains several product releases of the same product, the productreleases in question are compatible and interchangeable. Similarly, if the samerelease of a certain product is included in several system release item lists, thisparticular product release is compatible with the ACM2 products of all systemreleases.

2 System release features

2.1 Main features of system release

The ACM2 V5.1 system release C3.2 provides both the ISDN BA and basic POTSinterfaces.

Only such ISDN interface units that have the V5.1 software can be installed in anACM2 V5.1 equipment.

V5.1 interface to Local Exchange

The MCU provides a V5.1 signalling interface conforming to the specificationETS 300 324-1.

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ACM2 V5.1 Guide to System Release


2048 kbit/s G.703/G.704 interface

The MCU has two different types of aggregate interfaces available: 75 unbalanced and 120 balanced ones. The 2048 kbit/s frame conforms to ITU-TRecommendations (G.703 for digital interface and G.704 for basic frame

structure).

G.826 performance monitoring

The data transmitted from the node is constantly supervised, and statistics on thetransmission quality are collected in compliance with ITU-T RecommendationG.826.

Ring generator

The integrated ring generator on the MCU is sufficient to supply ringing voltagefor a 30-channel subscriber multiplexer under normal operating conditions (max.

10 VA, 75 VRMS, 25 Hz sine). It is also possible to use an external ring generator(max. 25 VA). For the restrictions concerning the use of an external ring generator,see the ACM2 V5.1 Installation document.

MCU programmable alarm outputs or inputs

The MCU has two programmable E&M-type alarm outputs and three alarminputs. For more information, see the MCU documents.

POTS service support

Each SUB unit provides the ACM2 with 10 analog two-wire subscriber interfaces.

Three SUB units together with an MCU constitute a 30-channel 2048 kbit/sprimary POTS (Plain Old Telephone Service) multiplexer.

Line feed polarity reversal

The polarity of a-wire and b-wire can be reversed (for use in different signallingapplications, such as answering function).

Metering

SUB unit T30707.01 provides both 12 kHz and 16 kHz metering signals fromwhich you can select the one that is suitable for subscriber private metering or for

payphones.

Local software download

ACM2 V5.1 supports local download of new software to the MCU with a portablePC, for example. Downloading is made through the PC interface in a special modecalled boot monitor . The boot monitor software is permanently stored in the MCUand is not changed during software downloads.

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V5.1 ISDN S/T-interface support

The S-interface is the standard user-network interface defined by ITU-T. The2B + D information is conveyed transparently through NT1 (the T-referencepoint) and NT2 (the S-reference point).

Up to 15 S/T-interfaces (2B + D) can be multiplexed to a 2048 kbit/s signal. AnISDN multiplexer can be constructed using, for example, four ISDN interfaceunits together with the MCU. Even individual ISDN subscribers can be connectedto the network in a combined installation with SUB units which provide a standardPOTS interface.

The S/T-interface unit conforms to the ITU-T I.430 and ETS 300 012-1recommendations.

V5.1 ISDN U-interface support

The V5.1 ISDN U-Interface is used to connect remote ISDN users to the ACM2Access Multiplexer with V5.1 interface to the local exchange (LE). Depending onthe unit, the ISDN U-interface units have either four or eight interfaces and theyuse the 2B1Q line coding for the basic rate interface (2B + D).

The D-channel packets can be freely mapped to any C-channel in accordance withETSI Standard ETS 300 324-1.

Up to 15 U-interfaces (2B + D) can be multiplexed to a 2048 kbit/s signal. Adedicated ISDN multiplexer can be constructed using ISDN interface unitstogether with the MCU, but it is also possible to install both ISDN and SUB unitsin the same ACM2 V5.1 node.

DYNACARD support

The System Release Item List document lists all DYNACARD units that are fullycompatible with ACM2 V5.1 System Release C3.2.

DYNACARD unit TU 21132.13 can be used with software TS 25312.02 toprovide DDN/LT operation. For basic V5.1 U-interface operation, as describedabove, the software should be TS 25312.03.

Line Test Module LTM (optional)

The Line Test Module (LTM) is an option module that is installed on the MCU.

The LTM provides the necessary additional hardware in order to performsubscriber line measurements and certain supervisory measurements on theACM2 V5.1 node.

The LTM has been designed to be used with ACM2 V5.1 SUB and 8-channelISDN units.

The subscriber and supervisory measurements can be performed as immediate orperiodic measurements.

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2.1.1 Node management

Q1 user interface

The Service Interface (SI) is usually used for connection to the centralisedNetwork Management System (NMS) via a Nokia Q1 bus, but the ServiceInterface can also be accessed with a Service Terminal.

Graphical user interface

The J1 interface on the MCU enables direct management access from ACM2 V5Node Manager to the ACM2 units.

Note ACM2 V5 Node Manager is an optional product to be ordered separately;it is not included in the basic configuration of the ACM2 V5.1 node.

2.1.2 Installation alternatives

ACM2 V5.1 nodes are normally equipped into 17-Slot DYNANET Subracks or12-Slot DYNANET Subracks, but they can also be equipped into certain 20 T or40 T cartridges.

17-Slot DYNANET Subrack, EMC

The 17-Slot DYNANET Subracks contain 16 unit locations for housing plug-inunits and a special unit location for Subrack Power Adapter (SPA). In a basicremote subscriber terminal setup, this means that four ACM2 multiplexers(altogether 120 B-channels) can be fitted in a single subrack.

The EMC subracks are specified to meet the ETS 300 386-1 Class 3 Specifications(Emission/radiated class B) provided that shielded cables are used.

Note Both the SUB and ISDN units can also be cabled with unshielded cableswhen EMC Euroconnectors are used as additional protection againstelectromagnetic disturbances.

The subracks (containing the remote terminals) are normally housed in 19-inchracks placed either indoors or in weather-proof locations, such as outdoorcabinets.

12-Slot DYNANET Subrack, EMCThe 12-Slot DYNANET Subrack contains 12 unit locations for housing plug-inunits. Unlike in the 19-inch ACM2 or DYNANET Subracks, there is no specialunit location for the SPA. Each 12-slot subrack can house three ACM2Multiplexers (altogether 90 B-channels).

The EMC subracks are specified to meet the ETS 300 386-1 Class 3 Specifications(Emission/radiated class B) provided that shielded cables are used.

Note Both the SUB and ISDN units can also be cabled with unshielded cableswhen EMC Euroconnectors are used as additional protection againstelectromagnetic disturbances.

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The subracks (containing the remote terminals) are normally housed in 19-inchracks placed either indoors or in weather-proof locations, such as outdoorcabinets.

20 T or 40 T Cartridges, EMCACM2 V5.1 node can also be installed into certain 20 T or 40 T cartridges (seeSystem Release Item List ). All features provided by the current system release areavailable also when the equipment is installed in 20 T or 40 T cartridges.

Caution The 20 T or 40 T cartridges cannot be placed outdoors.

2.1.3 Power supply alternatives

Subrack Power Adapter (SPA)

Unit location 17 in the subrack is reserved for a Subrack Power Adapter (SPA)unit, through which the external battery and signalling voltages are connected tothe subrack. Each SPA is able to supply one subrack only.

Enhanced Power Supply Adapter (EPSA)

You may also use a centralised power supply adapter, EPSA 19-inch, which is ableto supply operating voltages for up to six separate subracks. The EPSA is installedabove the subrack in a rack or cabinet.

DC Power Supply Adapter (DC-PSA)

The DC-PSA generates the external battery and signalling voltages for the ACM2.Each DC-PSA has eight 15 A outputs and can supply up to eight separate subracks.(If the signalling voltages are fed separately, the maximum number of subracks isfour.)

2.2 New features introduced in system release C3.2

Line Test Module (LTM)

The Line Test Module is an option module that is installed onto the MCU. It is usedfor subscriber line testing and supervisory measurements with SUB and 8-channelISDN units. Subscriber and supervisory measurements can be performed asimmediate or periodic measurements.

3 Compatibility with related products

The System Release Item List document shows all products (and their releases)that are compatible with the ACM2 V5.1 system release C3.2.

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4 System release notes

This chapter describes some features of the system release that require specialconsideration. These may be either unit-specific or ACM2-level notes.

Integrated Line Terminal, ILT (TU 21132.13)

This is an optional DYNACARD unit supported by the V5 ACM2. Before youinstall the unit and bring it into use, change both the jumper settings and thesoftware settings to support the DDN/LT mode. Note that for DDN/LT operationyou need to have software TS 25312.02. For further information, refer to the ILTunit’s own operating manual, (see Guide to Documentation).

ISDN line feeding voltage

In 8-channel ISDN U-interface unit T30734.02, the level of the line feeding

voltage can be selected with a jumper setting.

Caution Before you install the unit, make sure that the voltage is set to thedesired value. The default setting is -65 V.

For detailed instructions, see the ISDN Installation documents.

Line Test Module, LTM

The Line Test Module, if used, must be installed onto the MCU before the MCU isinserted in the subrack.

The LTM can measure the same parameters of the subscriber copper line for ISDN

U-interface on the 8-channel units as it does for the POTS interfaces.

MCU command 6,5,6,9 for disabling V5 alarms

The default setting for V5 alarms is enabled. If the V5 alarms are disabled, they arenot reported to the Network Management System (NMS) through the Q1-bus.Note, also, that command 1 Fault Display does not display V5 alarms.

Note The menu for disabling V5 alarms is intended to be used with non-V5applications only and should NOT be selected during normalV5-operation of the equipment.

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SYSTEM RELEASE ITEM LIST

Copyright Nokia Networks Oy

05–NOV–1999

A251 C3.2QA.1.1ACM2 System Release Version:

1/1

ACM2 V5.1 C3.2 RUS/RUS Approved: SKA 02–NOV–1999

Product

Name

Product

Code Release

Dependent

Item Release

T30800 EPSA Operating Instructions (E)T30506.09 DYNANET Subrack Inst. Manual (E)

T30507.09 DYNANET Subrack Inst. Manual (E)

T30851.** Operating Manual (E)

T30810.01 DC–PSA Operating Instructions (E)

ACM2 V5 Node Manager C3.2 User’s Manual (E)

ACM2 V5.1 C3.2 RUS/RUS Operating Manual (E)

PROGRAM FOR DIU2M/E

Dataunit 2M, nx64k; G.703/704, 75/120 ohm

Dataunit 2M, nx64k; G.703/704, 75 ohm

ACM2 V5 Node Manager C3.2;1 system

ACM2 V5 Node Manager C3.2; 5 system

ACM2 V5 Node Manager C3.2; 10 system

ACM2 V5 Node Manager C3.2 upgrd 1 system



Rack Power Interface Cable

19” shelf

ETSI 500mm SHELF

17–slot DYNANET Subrack

12–slots dynanet subrack

Grounding Screens for Pair Cables

EMC Euro Connectors Set (3 pcs)

EMC Euro Connector set (1pcs)

ACM2 V5 CONTROLLER, 75 ohm

ACM2 V5 CONTROLLER, 120 ohm

SUB Unit, 10 ch

ISDN S/T Interface Unit, BA, 4 ch.

ISDN BA U–IF,2B1Q,8CH,LT,RP

Line Test Module LTM

Line Test Module LTM

EPSA 19”, Complete Unit, 6 prot.switches

EPSA 19”,Complete Unit W/O prot.switches

Flat cable bus A for Enh. PSA 19”

Flat cable bus B for Enh. PSA 19”

Flat cable bus C for Enh. PSA 19”

Alarm Cable NTM / ACM2 2.5m

DC–PSA 19”/ETSI

SPA Subrack Power Adapter 7.5A

ILT1M RM GEN

CARTRIDGE 20 T EMC ,GREY–L91

CARTRIDGE 40T ,GREY–L91

Program E TU21132.10–.13

ACM2 V5 ISDN Unit ProgramProgram E /TU21120/TU21120.7/TU21120.8

Program E/ TU21122.5

Program E/ TU21122.6

Program E/ TU21124

Data Interface Unit 64k co/cont G.703 (10ch)

Data Interface Unit 48..64k V.11 10ch

Data Interface Unit 48..64k V.11 contr 5ch

Data Interface Unit nx64k V.11/V.35/X.21 2ch

2B1Q U–if unit 4 ch for ACM2/V5.1

V.11/V.28 CONVERTER GCABLE SET

5A Switch for 19” PSA

10A Protective Switch for 19” PSA

Connector 3x7

Connector 2x32

SMB–connector for RG 179 cable

SMB–connector for RD 179 cable (EMC)

Fixing parts for 40T/20T cassets to shelf

C33387.20C33424.20

C33424.21

C33425.20

C33470.20

C33580.20

C33843.20

CS24062

CU24012

CU24013

P31120.01

P31120.02

P31120.03

P31120.51

P31120.52

P31120.53

T30405.09

T30432.01

T30432.02

T30506.09

T30507.09

T30512.12

T30512.15

T30512.20

T30701.01

T30701.11

T30707.01

T30733.01

T30734.02

T30740.03

T30740.04

T30800.09

T30800.19

T30801.01

T30801.02

T30801.03

T30803.20

T30810.01

T30851.03

T65100.01

TF21184.09

TF21185.09

TS25312.02

TS25312.03TS25400

TS25425

TS25426

TS25440

TU21120

TU21122.5

TU21122.6

TU21124

TU21132.13

TU21748.02

TV21613.01

TV21629.01

TX21470

TX21474

TX21475

TX21475.05

TX21497.01

BC

B

B

F

B

A

06A

G

G

B

B

B

B

B

B

H

E

E

A

A

B

D

D

C

C

B

B

B

E

F

D

D

A

A

A

A

C

A

F

D

B

05B

01A10A

06A

07A

11A

D

E

C

H

A

A

0

A

0

0

0

0

A

P30916.01

P30916.01

P30934.01

P30905.02

A

A

A

B

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NTC C33579010SE_00 Copyright Nokia Telecommunications Oy

ACM2 V5.1


Product Description

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ACM2 V5.1 Product Description

NTC C33579010SE_00 Copyright Nokia Telecommunications Oyii

COPYRIGHT Nokia Telecommunications Oy 1999All rights reserved.

No part of this publication may be copied, distributed, transmitted, transcribed, stored in a retrieval system, or translated intoany human or computer language without the prior written permission of Nokia Telecommunications Oy.

The manufacturer has made every effort to ensure that the instructions contained in the documents are adequate and freeof errors and omissions. The manufacturer will, if necessary, explain issues which may not be covered by the documents.The manufacturer’s liability for any errors in the documents is limited to the correction of errors and the aforementionedadvisory services.

The documents have been prepared to be used by professional and properly trained personnel, and the customer assumesfull responsibility when using them.The manufacturer welcomes customer comments as part of the process of continualdevelopment and improvement of the documentation in the best way possible from the user’s viewpoint. Please submit yourcomments to the nearest Nokia sales representative.

NOKIA is a registered trademark of Nokia Corporation.

DYNANET is a trademark of Nokia Telecommunications Oy. Any other trademarks mentioned in the documents are theproperty of their respective owners.

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NTC C33579010SE_00 Copyright Nokia Telecommunications Oy iii

Document History

Document Date Comment

C33579010SE_00 25 Feb 1999

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NTC C33579010SE_00 Copyright Nokia Telecommunications Oy v

Contents

Chapter 1

About this document 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 2Overview of ACM2 V5.1 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.1 Application examples 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 ISDN Basic Access 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2.3 Installation alternatives 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 3

Basic architecture 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.1 ACM2 V5.1 Multiplexer Control Unit (MCU) 8. . . . . . . . . . . . . . . .3.1.1 Aggregate interface 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.1.2 64 kbit/s interface 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.1.3 Synchronisation interface 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.1.4 Measurement interface 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.1.5 Management interfaces 10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 Local software download 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 Bus structure 12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.4 Tributary units 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3.4.1 POTS Subscriber Interface Units (SUB) 13. . . . . . . . . . . . . . . . . . . . . . .3.4.2 V5.1 ISDN S/T-Interface Unit, BA 14. . . . . . . . . . . . . . . . . . . . . . . . . . .3.4.3 V5.1 ISDN U-Interface Unit, BA 15. . . . . . . . . . . . . . . . . . . . . . . . . . . .3.4.4 DYNACARD Interface Units 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.5 Line Test Module 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Chapter 4ACM2 V5.1 node management 19. . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1 General 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.1.1 Fault management 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.1.2 Configuration management 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.1.3 Network supervision 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4.1.4 Security management 22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2 ACM2 V5 Node Manager and Service Terminal (Emulator) 22. . . .

4.3 Alarm and supervisory interfaces 24. . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 5Power supply 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1 On-board power supply of Multiplexer Control Unit (MCU) 25. . .

5.2 Subrack Power Adapter (SPA) 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3 Enhanced Power Supply Adapter (EPSA) 26. . . . . . . . . . . . . . . . . . .

5.4 DC Power Supply Adapter (DC-PSA) 26. . . . . . . . . . . . . . . . . . . . . . .

Chapter 6Equipping alternatives 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.1 Equipping of the 19-inch subrack 27. . . . . . . . . . . . . . . . . . . . . . . . . .

6.2 Electromagnetic compatibility (EMC) 29. . . . . . . . . . . . . . . . . . . . . .6.2.1 EMC cabling alternatives 29. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Chapter 7Technical specifications 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.1 Related recommendations 31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.2 Environmental specifications 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.3 EMC specifications 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.4 Aggregate interface 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.5 Tributary interfaces 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7.5.1 POTS Subscriber Interface Units 34. . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.5.2 ISDN S/T-interfaces 34. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7.5.3 ISDN U-interfaces 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7.5.4 Leased line applications 35. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.6 Line testing 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.7 Power supply 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.8 Dimensions 38. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

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Appendix ARemote management, application examples A-1. . . . . . . . . . . . . . . . .

A.1 General principles A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A.2 Remote subscriber multiplexer station connected to two8M optical paths A-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A.3 Remote subscriber multiplexer station connected toSYNFONET Access Node (SAN) A-5. . . . . . . . . . . . . . . . . . . . . . . . . . .

A.3.1 Centralised summing A-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .A.3.2 Distributed summing A-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

A.4 Service connections cabling principles A-8. . . . . . . . . . . . . . . . . . . . . .

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About this document


Chapter 1

About this document

This document gives a general-level description of the entire ACM2 V5.1equipment. The following topics are covered:

overview of the ACM2 equipment basic architecture of the ACM2 and a description of the interfaces available description of the tributary units and Line Test Module principles of node management principles of power supply examples of equipment configuration technical specifications application examples of remote management.

The MCU, tributary units and Line Test Module are described in more detail intheir separate product descriptions.

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Overview of ACM2 V5.1


Chapter 2


Access Multiplexer ACM2 V5.1 is Nokia’s 2048 kbit/s primary multiplexer withspecial design emphasis on access network applications. As a member of Nokia’sDYNANET family, it is primarily intended to support POTS (Plain OldTelephone Service) and ISDN (Integrated Services Digital Network) BasicAccess applications. It has been designed for multiplexing analog speech andsignalling as well as digital interfaces of different bit rates into the 2048 kbit/sframe. These frames are then transmitted via a Recommendation G.703compatible 2048 kbit/s interface to a digital transmission system, PABX orexchange. Copper cable, radio relay link or fibre-optic cable can be used as thetransmission media.

The PSTN mapping complies with the V5.1 protocol.

2.1 Application examples

ACM2 V5.1 Multiplexer Control Unit (MCU) together with different tributaryunits provides a cost-optimised way to build a basic 30-channel subscribermultiplexer. The tributary units include 10-channel POTS subscriber interfaceunits and 4 or 8-channel ISDN interface units. In addition to those, the architectureof the ACM2 V5.1 equipment has been designed to support the use of differenttypes of DYNACARD data interface units. Therefore, use of the ACM2 V5.1offers a multitude of different applications.

Figure 1 shows examples of the basic ACM2 V5.1 applications.

The first application example (a) presents a basic POTS and ISDN multiplexer.The multiplexer is connected via the 2048 kbit/s path to a V5.1 interface of adigital exchange.

The second application example (b) shows a dedicated ISDN multiplexer.

The third application example (c) also includes leased line connections in additionto basic POTS and ISDN services. Note that only those DYNACARDapplications are supported within the V5 environment that do not use time slot 16for CAS signalling. This is due to the fact that time slot 16 is used for Common

Channel Signalling (CCS) in V5 applications. (For a complete list of DYNACARD units supported, see the System Release Item List ). In the exchange

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end, the leased lines are separated from other services or connectedsemipermanently through a switch.

POTS service

ISDN Basic Access V5.1 ISDN

ISDN

ISDN

ACM2V5.1

ACM2V5.1

DIGITALEXCHANGE

TS TS

TS TS

LL

V5.1

V5.1

(a)

(c)

DATA

POTS, ISDN

POTS, ISDN

2M2M

2M

DB 2,DN 2SXC T

Transmission path

Transmission path

ISDN

ACM2V5.1

TS TS V5.1

(b)2M Transmission path

ISDN

ISDN

2M

2M

DB 2 2 Mbit/s Branching EquipmentDN 2 2 Mbit/s Dynamic Node

Equipment

LL Leased Line interfacesSXC T Service Cross-Connect for

Time Division Multiplexing

TS Transmission SystemV5.1 2048 kbit/s interface to

exchange, using V5.1protocol

Figure 1 ACM2 V5.1 applications

2.2 ISDN Basic Access

ISDN Basic Access (BA) offers access to public or private networks. The BAallows connection of ISDN terminals, such as ISDN telephones, PersonalComputers, Group 4 FAX machines and video conference devices to ISDN. Formore information, see Figure 2. A Terminal Adapter (TA) can be used to connectdata interfaces (for example: V.24/V.28, V.35) or to provide POTS interfaces toISDN. Calls can be handled simultaneously by two ISDN terminals on the S-bus.

For basic users, ISDN offers comfort functions, such as calling lineidentification and charge identification. For professional users, ISDN offersadvanced functions, such as X.25 data transfer on the B and D-channels. TheD-channel packets can be freely mapped to any C-channel according to ETSIstandard ETS 300 324-1

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ACM2 Access MultiplexerLE Local ExchangeNT1 Network Termination type 1; physical and electrical connection of

a user terminal to the networkNT2 Network Termination type 2; switching and concentrationPABX Private Automatic Branch ExchangeR R reference point; between non-ISDN terminal equipment and TAS S reference point; basic user–network interface (S-bus)T T reference point; ISDN network interface (electrically similar to

S reference point)U U reference point; ISDN two-wire subscriber interfaceS-IF V5.1 ISDN S/T-interface unitTA Terminal Adapter providing mapping functions for LAN (via a router),

V-series or X-series interfaces, for instance

TE ISDN-compatible Terminal Equipment (PC, digital phone, FAX orTerminal Adapter)

U-IF V5.1 ISDN U-interface unitV5.1 2M interface to exchange, V5.1 protocol

ACM2 V5.1

MCUU-IF

S-IF

NT1

TE

NT2TE

PABX

2M link

V5.1

S T

U

S/T

U

Tributaryinterface

Aggregateinterface

LE

T

ULAN

NT1

R

NT1NT2TA

TS

Figure 2 Application examples of a standard ISDN Basic Access

S- and U-interfaces

The S-interface is the standard user-network interface defined by ITU-T. The

2B+D information is conveyed transparently through NT1 (the T-reference point)and NT2 (the S-reference point).

The electrical characteristics of the T-reference point are equivalent to those of theS-reference point, and both reference points are therefore referred to as theS-interface in this document.

The U-interface is a two-wire subscriber line that uses a transmission systembased on echo cancellation and specific line coding (2B1Q or 4B3T). Themaximum length of the subscriber line is 5 to 8 kilometres, depending on thecharacteristics of the line. At the user side, the U-interface is terminated by aNetwork Termination 1 (NT1), which is installed indoors, usually at customer

premises.

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2.3 Installation alternatives

The ACM2 V5.1 equipment is normally equipped into 19-inch subracks(DYNANET Subracks, for instance) enabling optimum utilisation of equipment

space. At the remote sites, the subracks can be housed, for example, in Nokia’svarious indoor or outdoor cabinets. In the exchange environment, the subracks arenormally installed in 19-inch racks or in 600 mm wide ETSI racks. The ACM2V5.1 equipment can also be installed into 12-slot DYNANET Subracks, or incertain 20 T or 40 T cartridges when Nokia’s slim racks are used. (See the System

Release Item List for a complete list of cartridges and subracks that can be usedwith ACM2 V5.1.)

In a basic remote subscriber terminal setup, four ACM2 V5.1 Multiplexers (120channels) are housed in a 19-inch subrack. The DYNANET Subrack can house aSubrack Power Adapter (SPA) unit, through which the external battery andsignalling voltages are connected to the subrack. Alternatively, it is possible to use

a centralised power supply adapter, EPSA 19-inch (Enhanced Power SupplyAdapter) or a DC-PSA (see also Chapter 5).

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Basic architecture


Chapter 3

Basic architecture

The functional blocks of the ACM2 V5.1 equipment are presented in Figure 3.

2048 kbit/s

ACM2 V5.1TRIBUTARYUNITS(SUB, ISDN)

CONTROLLER

Line Test Module

POWER/RING GENERATOR

BUSI-F

AGGRI-F

64 kbit/s

MANAGEMENT

ACM2 BUS MEAS SYNC

TEST BUS

MCU

DYNACARDINTERFACEUNITS

POWER

Figure 3 ACM2 V5.1 block diagram

The ACM2 V5.1 equipment consists of the following plug-in units:

Multiplexer Control Unit (MCU) common to all equipment configurations tributary units (SUB and ISDN units) connected to the MCU via the ACM2

bus optional Line Test Module (LTM) installed onto the MCU.

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Different kinds of services can be realised by using the following tributary units:

analog Subscriber Interface Unit (SUB) with 10 interfaces ISDN U-Interface Unit either for 2B1Q line coding (with 4 or 8 interfaces) or

4B3T line coding (with 8 interfaces)

ISDN S/T-Interface Unit with 4 interfaces DYNACARD interface units providing different kinds of data interfaces.

The MCU provides the interfaces to the ACM2 bus, external 64 kbit/s and2048 kbit/s interfaces, as well as the management interfaces to the ServiceTerminal (Emulator), ACM2 V5 Node Manager or to NMS (Network Management System).

3.1 ACM2 V5.1 Multiplexer Control Unit (MCU)

The MCU incorporates most of the control, multiplexing, management and

supervision functions of the equipment. It also provides the operating voltages,including ringing voltage, for the subscriber interface units. In addition, the MCUcontains the software for controlling both its own operation and the operation of the tributary units and Line Test Module (LTM).

The Multiplexer Control Unit, MCU, has the following interfaces (Figure 3):

2048 kbit/s aggregate interface 64 kbit/s interface synchronisation interface measurement interface management interfaces (including EOC).

A Line Test Module (LTM) can be attached on the MCU when required.

3.1.1 Aggregate interface

The Multiplexer Control Unit, MCU, has a 2048 kbit/s aggregate interface (2M)conforming to ITU-T Recommendations G.703 and G.704.

ACM2 V5.1

2MG.703/ G.704

Transmit direction

Receive direction

AGGREGATEINTERFACE

NETWORK

Figure 4 2048 kbit/s aggregate interface

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Basic architecture


The functions of the aggregate interface block are:

to generate the transmit-direction clock frequency of 2048 kHz to control the time-division multiplexing and demultiplexing in the tributary

units

to form the G.704-compliant frame to perform the HDB3 conversion in both directions in compliance with the

G.703 Recommendation to synchronise the internal operations to generate the receive-direction clock signal to synchronise to the incoming signal’s frame phase to monitor the error ratio of the received signal to detect the AIS to carry out alarm functions to collect and analyse fault information of the entire node to run the CRC4 control in compliance with the G.704 Recommendation

to supervise the transmission and collect statistics of the transmission qualityin compliance with the G.826 Recommendation.

3.1.2 64 kbit/s interface

The 64 kbit/s interface of the MCU can be used to connect data to any free timeslot, for example, for transmitting management information. The 64 kbit/sinterface conforms to the ITU-T Recommendation V.11.

3.1.3 Synchronisation interface

The MCU has one 2048 kbit/s synchronisation input and output.

The operation of the ACM2 V5.1 can be synchronised to:

the receive direction clock extracted from the incoming 2048 kbit/s signal the external synchronisation input signal the 64 kbit/s data interface signal,

or it can be set to use its own internal clock.

Each of the selected synchronisation sources has a user-selectable priority. If theprimary synchronisation source fails, the changeover to the redundant source

takes place according to the preselected priority order.The synchronisation output can be synchronised to the transmit-direction clock orthe clock regenerated from the aggregate signal. The synchronisation output canbe set to be automatically switched off in fault situations.

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3.1.4 Measurement interface

One of the following signals can be selected to the measurement interface with aselection given via the service interface:

transmitted 2048 kbit/s signal received 2048 kbit/s signal transmit-direction clock receive-direction clock 3072 kHz clock.

3.1.5 Management interfaces

The external and internal management interfaces of the ACM2 V5.1 are shown inFigure 5.

Service Interface (SI)

The Service Interface, SI, is normally used for connection to the centralisedNetwork Management System (NMS) via a Nokia Q1 bus (Q1’), but also theService Terminal can be locally connected to the SI. The interface complies withthe V.11 Recommendation. The equipment can be controlled via this interface,and detailed information on the location and nature of the fault as well asperformance statistics can be obtained through it.

V.24/V.28 interface

One of the special features of the ACM2 V5.1 is the local V.24/V.28 service

interface in the Controller block. This interface enables a simultaneousmanagement access via an ACM2 V5 Node Manager or a Macro STE (ServiceTerminal Emulator) without breaking the connection to the centralisedmonitoring system.

Data Interface (DI) and Embedded Operations Channel (EOC)

The MCU is provided with an auxiliary data interface (DI), for example, forconnection to an EOC by using any free time slot available. By using the free bitsin TS0, it is possible to establish an asynchronous data channel operating on asampling principle and with a transfer rate of 600 to 4800 bit/s, the actual ratedepending on the number of bits used. When a whole time slot (all eight bits) isused, the transfer rate may be up to 19200 bit/s. The electrical interface of the DI issimilar to that of the Service Interface SI. See Figure 5.

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Basic architecture


(e.g. ACM2 V5NODEMANAGER)

ACM2BUS

SYNCHRONISATIONINPUT/OUTPUT

MEASUREMENTINTERFACE

INTERNALQ1’

CONTROLBUS

(for example,SERVICETERMINAL)

ALARMOUTPUTS (E&M)

Line Test Module

BUSI-F

CONTROLLER

DATAHYBRID

AGGRI-F

ALARMINPUTS (E&M)

TESTBUS

2 x E&M

ANALOG INPUTfor example, battery

EXTERNAL

TESTERS

Figure 5 Management Interfaces of ACM2 V5.1

Data hybrid

By using the MCU’s data hybrid together with the control and service interfaces,

the Nokia Q1 (Q1’) service bus can be extended beyond the physical limits of theinterface (Figure 6).

For application examples, see Appendix A.

The remote terminal is connected to a Q1’ control bus via the embeddedoperations channel, EOC, or alternatively via the Service Interface, SI, to a localcontrol bus. The Q1’ bus is extended via the internal Q1’ bus or via the DataInterface, DI interface to other multiplexers.

The Q1’ bus can also be extended via the internal Q1’ bus to another ACM2 V5.1equipment or to a tributary unit.

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µ

Figure 6 Principle of data hybrid and service channel operation

3.2 Local software download

ACM2 V5.1 supports local download of new software to the MCU with a portablePC, for example. This function enables fast and easy system upgrades when new

features are added to existing nodes.

Downloading is made in a special mode called boot monitor through the PCinterface. The boot monitor program is permanently stored in the MCU and is notchanged during software downloads.

There are two individual flash memories on the MCU, and both of them can storeone software release. With the boot monitor, it is possible to select which memoryis used and you can make backup copies of one memory to the other one.

3.3 Bus structure

The interfaces between the MCU and the tributary units in the ACM2 V5.1equipment are implemented via the ACM2 bus. Data is transferred using2048 kbit/s internal buses. Part of the buses are used by ACM2 V5.1 tributaryunits and part as general purpose data buses.

In addition to the above buses, the equipment is provided with asynchronous serialbuses, for example, for the transfer of service information between the MCU andthe tributary units.

The motherboard contains a power supply bus for feeding the internal voltagesfrom the MCU and external voltages from the Subrack Power Adapter (SPA),Enhanced Power Supply Adapter (EPSA) or DC-PSA.

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Basic architecture


3.4 Tributary units

The tributary interfaces can be implemented by four types of interface units:

POTS Subscriber Interface Units ISDN S/T-interface units ISDN U-interface units DYNACARD interface units.

3.4.1 POTS Subscriber Interface Units (SUB)

Each Subscriber Interface Unit provides the ACM2 equipment with ten POTSinterfaces. The unit contains a voice-frequency channel between the 64 kbit/ssignal and the two-wire interface. The unit also supports signalling between theterminal equipment and the interface, and V5.1 signalling between the exchangeand the interface.

The electrical characteristics of the two-wire interface can be adapted to meetdifferent country-specific requirements, such as line feeding characteristics andinput and balance impedances.

The unit can support different kinds of interfaces and signalling functions (basicand extended), provided that they are supported by national V5.1 PSTN mapping.

The main user interfaces supported are:

POTS (Plain Old Telephone Service) payphones

PABX (without Direct Dialling-In, DDI).Basic signalling functions supported are:

line feed ON/OFF-hook detection decadic dialling ringing signal with supported ringing cadences ring trip detection.

Extended signalling functions supported are:

Subscriber Private Metering (SPM) at 12 or 16 kHz

polarity reversal register recall loop start (PABX) break of current feed (Disconnect clear signal) Calling Line Identity presentation (CLI).

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The following interface parameters can be set via the service interface:

interface IDs line feeding characteristics input and balance impedance

channel use / time slot allocation transmit and receive audio level fault consequences (alarm status) balance network 12/16 kHz metering, frequency and level optional signalling parameters loop-back activation selection of country adaptation options L3 address interface blocking permanent line selection.

3.4.2 V5.1 ISDN S/T-Interface Unit, BA

The V5.1 ISDN S/T-interface unit is used to connect ISDN users to ACM2 AccessMultiplexer and further, through a V5.1 interface, to Local Exchange (LE). Theunit employs the 2B+D Basic Access structure. The multiplexer with ISDNS/T-interfaces is usually located at customer premises because of the limitedlength of the S-bus.

Up to 15 S/T-interfaces can be multiplexed to a 2048 kbit/s signal (or even up to 20S/T-interfaces if only one B-channel of each interface is connected). An ISDNmultiplexer can be constructed using, for example, four ISDN interface unitstogether with the MCU. Even individual ISDN subscribers can be connected to thenetwork in a combined installation with SUB units which provide a standardPOTS interface.

Key features

Provides 4 Basic Access S-interfaces. Up to 8 TEs can be simultaneouslyconnected to each S-interface.

Line transmission is based on AMI line code.

Subscriber line supply is 40 V with a current limit of 135 mA at the minimum.

Supports point-to-point and point-to-multipoint bus configurations.

Provides remote power feeding to up to four TEs on one bus.

Supports permanent line selection and permanent activation selection (forpartial PL use).

Allows unrestricted connection of Bearer channels (B-channels) from eachS-interface to any unallocated time slots in the 2048 kbit/s signal.

Is configured and managed through the MCU.

Maintenance of the S/T-interface units complies with ITU-T I.430 andETS 300 012-1.

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Basic architecture


Enables remote loopbacks, block error monitoring and statistics.

Conforms to the following recommendations and standards:

S- and T-reference points: ITU-T Recommendation I.430 and ETSI

standard ETS 300 012. Frame structure, activation procedure and D-channel access procedure:

ITU-T Recommendation I.430. Mapping of D-channel packets to C-channel:

ETSI standard ETS 300 324-1.

3.4.3 V5.1 ISDN U-Interface Unit, BA

The V5.1 ISDN U-Interface Unit multiplexes the 2B+D Basic Access structure of the U-interfaces to the 2048 kbit/s signal. It is used to connect remote ISDN usersto the ACM2 Access Multiplexer and further, through a V5.1 interface, to Local

Exchange (LE).

Up to 15 U-interfaces can be multiplexed to a 2048 kbit/s signal (or even up to 20U-interfaces if only one B-channel of each interface is connected). An ISDNmultiplexer can be constructed using, for example, four ISDN interface unitstogether with the MCU. Even individual ISDN subscribers can be connected to thenetwork in a combined installation with SUB units which provide a standardPOTS interface.

Key features

Provides 8 or 4 (depending on the unit type) Basic Access U-interfaces.

Line transmission is based on ETSI ETR 080 and ANSI T1.601-1988 withthe 2B1Q (8 or 4 interfaces) line code or 4B3T line code (8 interfaces)

Subscriber line supply may be –65 V, –97 V or –110 V with a current limit50 mA.

Supports both permanent line (PL) selection and permanent line activationselection (for partial PL use).

Allows the unrestricted connection of the B-channels from each U-interfaceto any time slots in the 2048 kbit/s signal.

Is configured and accessed via the MCU. Maintenance of U-interface units complies with ETSI/ITU (both 2B1Q and

4B3T line codes) and FTZ (for 4B3T line code only):

loopbacks in the LT, repeater, and NT continuity test (activation of layer 1) quick test (defined only for 4B3T) remote power feeding control (switch on and off, supervision of feeding

current and voltage) detection of errors (error information from NT, repeater and LT; for

example, line code errors).

Enables remote loopbacks, block error monitoring and statistics.

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3.4.4 DYNACARD Interface Units

The DYNACARD digital interface units provide a range of different interfaces fordigital leased line applications:

Bit rate Channelsper unit

Interface

64 kbit/s 10 G.703/G.704 co- or contradirectional synchronous

2048 kbit/s 1 G.703/G.704, frame G.704, information raten x 64 kbit/s (64 -1984 kbit/s)

48, 56, 64 kbit/s 10 V.35, V.11 synchronous, no control signals

48, 56, 64 kbit/s 5 V.35, V.11, X.21 synchronous, no control signals

n x 64 kbit/s 2 V.11, V.35, X.21 synchronous, with control signals

2 x 64 kbit/s 4 V.28, V.11, V.35, X.21, G.703 through Nokia DataNetwork Terminal (DNT128)

Table 1 Digital DYNACARD interface units

For a complete list of ACM2 compatible DYNACARD units and their productcodes, see the System Release Item List .

3.5 Line Test Module

The Line Test Module (LTM) is an option module that is installed on the ACM2V5.1 Multiplexer Control Unit (MCU). The LTM provides the necessary

additional hardware in order to make subscriber line measurements and certainsupervisory measurements with the ACM2 V5.1 node.

The LTM has been designed to be used with ACM2 V5.1 SUB and 8-channelISDN units.

The LTM is controlled by the software of the MCU and uses the operating voltagesand resources of the MCU. Since the LTM is a thin module attached directly ontothe MCU, no additional rack space is required.

Key features

Add-on module for the MCU that requires no additional rack space Subscriber line measurements Supervisory measurements:

Battery voltage Ring generator current

Four external voltage inputs suitable, for example, for temperaturemeasurements or measuring other battery voltages

Supervisory control inputs/outputs of E&M type that can be controlledthrough management connection two outputs two inputs

Provides connection for external line test equipment

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Basic architecture


All measured parameters can be programmed to initiate alarms when theuser-defined limits are exceeded

Flexible measurement execution control Immediate execution through management connection Periodic measurements executed independently by the LTM at specified

time and with specified time interval Continuous monitoring or data acquisition for external analysis

application through ACM2 V5 Node Manager Full control through ACM2 V5 Node Manager or through service menus.

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ACM2 V5.1 node management


Chapter 4


4.1 General

The management of the ACM2 V5.1 node (that is, commissioning, operation andmaintenance) can be carried out using either ACM2 V5 Node Manager, MacroSTE (both running on a PC), a hand-held Service Terminal or the Network Management System (NMS). The following describes some general principles of managing the ACM2 V5.1 node.

The management operations can be divided into four main sections:

fault management

configuration management network supervision security management.

4.1.1 Fault management

The fault management means the continuous monitoring of the equipment alarmstatus information gathered in the MCU alarm data base. The MCU continuouslyupdates this data base by polling the supervision blocks of all ACM2 V5.1 units:the aggregate interface, the bus interface and the power supply block, tributaryinterfaces and Line Test Module.

Examples of faults supervised in the ACM2 V5.1:

fault in power supply missing aggregate signal synchronisation fault frame alignment lost CRC4 multiframe alignment lost error rate > 10-3

far-end alarm AIS received loopback activated (or other control function selected) fault in a tributary unit

fault in a channel V5.1 protocol faults.

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The equipment alarms are transmitted via the alarm bus to alarm relays located inthe SPA (Subrack Power Adapter), EPSA (Enhanced Power Supply Adapter) orDC-PSA. The alarm relays forward alarms A (prompt), B (deferred) and D(reminder of alarm cancellation) to the transmission management centre as rack alarms.

4.1.2 Configuration management

First of all, the term configuration management is used to refer first of all to theprocess of bringing all units in the equipment setup into use. Secondly,configuration management is used to provide each unit or an individual channelwith appropriate settings required for the application in question. The settingsgiven to the ACM2 V5.1 units are stored in a nonvolatile memory.

The following list shows some typical ACM2 V5.1 settings which can be given viathe management interface (either locally or centrally via the EOC).

unit and interface identifications time slot allocation to different services audio level settings for transmit and receive direction impedance settings balancing network settings line feeding setting signalling parameters 12/16 kHz metering signal selection data interface parameters use of the free bits in TS0 V5.1 interface settings, for example use of C-channels use of an external 64 kbit/s interface.

4.1.3 Network supervision

The conditions of the network and the ACM2 V5.1 as a part of it can be monitoredand certain measurements can be activated if requested with the ACM2 V5 NodeManager or Service Terminal (Emulator). The operations are menu-driven.

The following loopbacks can be activated:

at the MCU’s aggregate interface

2M signal looped to interface 2M signal looped to equipment channel looped to interface (from time slot m to time slot n) channel looped to equipment (from time slot m to time slot n)

at the MCU’s 64 kbit/s interface 64 kbit/s looped to interface 64 kbit/s looped to equipment

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on the SUB interface units D/A–A/D loop at the analog side of the CODEC D–D loop at the digital side of the CODEC

on the ISDN S/T-interface units

S-interface 2B+D external loop to equipment S-interface 2B+D loop to equipment, transparent S-interface 2B+D loop to equipment, non-transparent S-interface B1+B2 loop to equipment S-interface B1+B2 loop to interface unit loop to equipment and interface

on the ISDN U-interface units all channels back to aggregate (on 4-channel units only) analog loop loop at the repeater loop at the NT

on the DYNACARD interface units as specified in the unit descriptions.

In addition to the tests mentioned above, the ACM2 V5.1 equipment incorporatesseveral self-testing properties. These include self-diagnostics, error ratiomonitoring, compilation of fault information and statistics on the quality of thetransmission path (in accordance to the ITU-T Recommendation G.826).

The statistics display shows:

total time (TT) available time (AT) unavailable time errored seconds (ES) severely errored seconds (SES) errored blocks (EB) background block errors (BBE) unavailable time / total time errored seconds / available time (ESR) severely errored seconds / available time (SESR) background block errors / total blocks (BBER).

The error counters show, for example:

number of losses of frame alignment number of errored frame alignment words number of CRC4 block errors number of CRC4 block errors detected in the far end number of MCU processor resets.

For more information about the statistics available, see also the documentation of the different tributary units.

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There are also detailed state, statistics and error counter displays for the V5.1protocols. These displays are primarily used to facilitate diagnosing configurationerrors, and they include:

current states of the protocol FSMs (finite state machines)

number of C-channel frames and octets protocol errors.

4.1.4 Security management

A password can be set via the management interface to prevent unauthorisedaccess to the system.

4.2 ACM2 V5 Node Manager and Service Terminal

(Emulator)The tools available for local management of the ACM2 V5.1 node are ACM2 V5Node Manager, operating together with Macro STE (Service Terminal Emulator)and running on a PC, and a hand-held Service Terminal. A typical applicationexample is shown in Figure 7. ACM2 V5 Node Manager can be connected directlyto the V24/V28 interface of the MCU. The Service Terminal is connected to theSI/DI interface that is normally connected further to a Q1’ bus. Alternatively, theQ1’ bus can be connected to the Network Management System (NMS) via anembedded operations channel (EOC).

ACM2 V5 Node Manager is a Windows based program providing an easy-to-use

interface between the user and the ACM2 V5.1 equipment. The main features of ACM2 V5 Node Manager include:

management of all ACM2 V5.1 units

collection of alarm information from the entire ACM2 V5.1 node (includingDYNACARD interface units)

collection of statistics and performance monitoring information from theACM2 V5.1 node

subscriber and supervisory measurements can be performed as immediate orperiodic measurements for SUB and 8-channel ISDN units.

stand-alone applications (the node settings can be configured in NodeManager and loaded later to the actual node).

An ACM2 V5 Node Manager display example is shown in Figure 8.

For managing DYNACARD interface units, for which ACM2 V5 Node Manageris not able to provide service menus, Macro STE is needed.

Macro STE is Windows based program implementing the following functions:

DYNACARD interface unit support configuration macros (user programmable set of Service Terminal

commands) all normal Service Terminal functions.

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MCU

ACM2 V5.1

2M G.703/704

EOC

Q1’ BUS(SI/DI)

ST

TRANSMISSIONNETWORK

EOC

V24/V28LOCAL MANAGEMENT IF

LOCALEXCHANGE

T r i b u t a r y

u n i t s

NMS

ACM2 V5 NODE MANAGERPROGRAM

PC

Figure 7 Management tools for the ACM2 V5.1

Figure 8 Example of an ACM2 V5 Node Manager display

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4.3 Alarm and supervisory interfaces

Each unit has two or three service LEDs for local alarm indication.

Red LED indicates a serious fault in the unit.

Yellow LED indicates a minor fault or a fault which is outside the unit (forexample, fault in an interface, fault in a channel).

Green LED indicates that the unit has been selected as an object of management operations.

Equipment alarms are conveyed via the motherboard as A (prompt), B (deferred)or D alarms (reminder of alarm cancellation) to the SPA (Subrack PowerAdapter), EPSA (Enhanced Power Supply Adapter) or DC-PSA. The powersupplies use their relay contact alarm outputs to activate the rack alarm LEDs.

The ACM2 V5.1 has alarm and supervisory inputs and outputs for the supervisionand control of its external operating environment (for example, temperature).

Multiplexer Control Unit (MCU)

The MCU provides three programmable E&M-type alarm inputs and twoprogrammable alarm outputs (to detect ground potential or loop relay alarms) forgenerating user-definable alarms.

Line Test Module (LTM)

The optional Line Test module (LTM) is installed on the MCU.

two supervisory control inputs and outputs four external voltage measurement inputs battery measurement point to monitor the battery voltage external test access for attaching third party testers ringing current measurement.

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Power supply


Chapter 5

Power supply

5.1 On-board power supply of Multiplexer ControlUnit (MCU)

The ACM2 V5.1 Multiplexer Control Unit (MCU) has an on-board power supplyincluding a ring generator. The power supply feeds the power required by theMCU and Line Test Module as well as the operating and ringing voltages for thesubscriber interface units. The power for the microphone current feed is takendirectly from the battery or signalling voltage supply via an SPA (Subrack PowerAdapter), 19-inch EPSA (Enhanced Power Supply Adapter) or DC-PSA.

The power of the ring generator (10 VA, 75 VRMS) is sufficient to feed a30-channel subscriber multiplexer under normal operating conditions. Inexceptional traffic conditions, a separate ring generator can be used (max. power25 VA).

The ISDN interface units and DYNACARD units have internal power suppliesthat generate the required operating voltages from the battery or signallingvoltage.

5.2 Subrack Power Adapter (SPA)

In an exchange environment, the power is taken directly from the exchangebattery. The power for the remote terminal can be taken from the mains via anAC/DC Power Interface Adapter and a backup battery.

The 19-inch DYNANET Subrack can house a Subrack Power Adapter (SPA),through which the power is fed from the battery to the on-board power supplies of the MCUs, ISDNs and DYNACARD interface units. The signalling voltageneeded for signalling and microphone current feed is fed directly from the SPA tothe tributary units. Normally, the battery voltage is also used as the signallingvoltage, but in some special applications a separate signalling voltage may beneeded.

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The functions of the SPA include disturbance filtering, overcurrent andovervoltage protection, power break switch, rack alarm functions (A-, B- andD-alarm relays) and a backup power supply for alarm monitoring purposes.

5.3 Enhanced Power Supply Adapter (EPSA)

Instead of an SPA, a centralised power supply adapter, 19-inch Enhanced PowerSupply Adapter (EPSA) can be used. Its main features are similar to those of theSPA, but it can supply up to six separate 19-inch subracks.

5.4 DC Power Supply Adapter (DC-PSA)

The key features of the DC-PSA are similar to those of the SPA or EPSA. Themain difference to EPSA, for instance, lies in its higher power distribution

capacity: the DC-PSA is able to feed 50 A to unit power supplies and 50 A tosignalling circuits, that is, 100 A at the maximum. In EPSA, the maximumcurrents are 15 A and 40 A respectively.

The DC-PSA has eight 15 A outputs and can supply up to eight separate 19-inchsubracks. (If the signalling voltages are fed from a separate battery, the maximumnumber of subracks will be four.)

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Equipping alternatives


Chapter 6


6.1 Equipping of the 19-inch subrack

The ACM2 equipment is normally equipped into 19-inch subracks, which enableoptimum utilisation of equipment space as well as installation into 600 mm wideETSI racks or 19-inch IEC racks.

The main applications of the V5.1 ACM2 are (1) 30-channel POTS multiplexer,(2) Basic Access ISDN multiplexer with 15 S/T or U-interfaces and (3) mixed useof POTS and ISDN units in the same multiplexer. Figure 9 gives someconfiguration examples.

The minimum configuration of a 30-channel POTS Access Multiplexer consistsof one MCU and three SUB units, which together require four unit locations(multiplexers 1 and 2 in Figure 9). In a basic remote subscriber terminal setup, thismeans that four ACM2 multiplexers (120 B-channels) can be housed in a19-inch subrack.

Multiplexer 3 in Figure 9 shows an example of a mixed use of ISDN, SUB andDYNACARD interface units in the same multiplexer.

Multiplexer 4 shows an example of a mixed POTS, ISDN-S and ISDN-Umultiplexer.

Multiplexer 5 shows an ISDN-S multiplexer with 15 Basic Access interfaces, thatis, with the total capacity of 30 B-channels to the aggregate interface.

Multiplexers 6 and 7 are examples of ISDN-U multiplexers that provide the totalcapacity of 30 B-channels by using just two ISDN-U units.

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MUX6

MCU SUB SUB SUB MCU SUB SUB SUB MCU SUB DIU ISDN-S MCU POTS ISDN-S ISDN-U SPA

MUX1 MUX2 MUX3 MUX4

MCU 4 x ISDN-S

MUX5

DIU Data Interface UnitISDN-S ISDN S/T-Interface Unit, 4 interfacesISDN-U ISDN U-Interface Unit, 8 interfacesMCU Multiplexer Control UnitSPA Subrack Power Adapter

SUB Subscriber Interface Unit, 10 channels, for POTS use

MUX7

MCU 2 x ISDN-U MCU 2 x ISDN-U

Figure 9 ACM2 V5.1, equipping of 19-inch subrack

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6.2 Electromagnetic compatibility (EMC)

Nokia’s DYNANET Subrack and ACM2 EMC Subrack are both specified tomeet the standards set for the public telecommunication network equipment,

ETS 300 386-1 Class 3 (locations other than telecommunication centers, normalpriority of service), Emission/Radiated Class B:

when using shielded cables (for recommended cable types, see Product Description of the subrack used).

when using unshielded cables together with EMC Euroconnectors. Note,however, that the EMC Euroconnectors can only be used with certaintributary units (see the system release documents for a complete list of suchunits).

Note Shielded cables must always be used for the cabling of interfaces with acapacity of 2048 kbit/s or higher.

6.2.1 EMC cabling alternatives

The EMC requirements are met only when using the products mentioned belowand following the cabling and grounding instructions given in the installationinstructions of the subrack used.

Shielded cables

When the cable connecting the ACM2 to the cross-connection space is long or thecross-connection space is protected against electromagnetic disturbances, no

additional protection is required.

Only when the cable connecting the ACM2 to the cross-connection space is shortand the cross-connection space is not protected, it is necessary to use additionalprotection. For additional protection we recommend the use of EMCEuroconnectors. (For detailed instructions, see the installation instructions of thesubrack used.)

Unshielded cables

If unshielded cables are used, the cables must be connected to tributary units usingEMC Euroconnectors. (For detailed instructions, see the installation instructions

of the subrack used.)

Caution Unshielded cables can only be used with the tributary units that areindicated in the system release documents. All other units requireshielded cables.

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Technical specifications


Chapter 7


7.1 Related recommendations

The ACM2 V5.1 conforms to the following recommendations concerningmultiplex equipment and, where applicable, analog interfaces of a digitalexchange:

Related recommendations and standards

ACM2 V5.1 equipment

ITU-T G.703 Digital interfaces

ITU-T G.704 Basic frame structure

ITU-T G.706 Frame alignment and CRC4 check procedures

ITU-T G.711 PCM coding law

ITU-T G.712 Transmission performance characteristics of pulse codemodulation (09/92)

ITU-T G.732 PCM multiplex equipment

ITU-T G.735–739 Characteristics of 2048 kbit/s multiplex equipment

ITU-T G.797 Characteristics of flexible multiplexer

ITU-T G.823 Jitter and wander

ITU-T G.826 Performance monitoring of international digital connection(in essentials, similar to Rec. G.821)

ITU-T Q.512 Exchange interfaces for subscriber access

ITU-T Q.552 Transmission characteristics at two-wire analog interfaces ofdigital exchange (11/92)

ITU-T K.20 Overvoltage protection

ETS 300 386-1 EMC requirements

V5.1 interface

ETS 300 324-1 V5.1 interface specification

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Related recommendations and standards

ISDN S/T-interface unit

ITU-T I. 430 Basic user-network interface – layer 1 specification

ITU-T K. 22 Overvoltage resistibility of equipment connected to an ISDNT/S bus

ETS300012-1 Basic user-network interface layer 1 specification and testprinciples

ETSI ETR 080 Line transmission, power feeding

FTZ 1 TR 216 Fernmeldetechnisches Zentralamt: Euro-ISDN: NationaleZusatzfestlegungen Speisekonzept für den Basisanschlußund den Primärmultiplexanschluß

ISDN U-interface unit

ITU-T G.961 Line transmission, power feeding

ETSI DTR/TM 3002 Performance requirements

ETSI ETR 080 Line transmission, power feeding

ANSI T1.601-1988 Line transmission

7.2 Environmental specifications

The ACM2 V5.1 multiplex equipment conforms to the following environmentalrequirements.

OperationETSI ETS300 019–1/2/3,class 3.1 E (3.2)

Stationary use at weather-protected locations in temperature-controlled (or partly controlled) environment. Operating tem-perature –10 to +45 °C.

Transportation

ETSI ETS 300019–1/2/3, class 2.3

Public transportation

7.3 EMC specifications

The electromagnetic compatibility (EMC) specifications are met as long as theunit is installed in Nokia EMC construction and care is taken to follow Nokia’sinstallation recommendations.

The emission specifications are valid for the entire system including the MCU,tributary units and power supplies.

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Emission

EN55022 Class B Conducted emission on power leads

ENV55102-1 Class B Conducted emission on subscriber lines

EN55022 Class B Radiated emission

Immunity

ENV 50140 Radiated Interference

ENV 50141 Conducted Interference

IEC 801-4 Electrical Fast Transient

EN 60801-2 Electrostatic Discharge

ENV 50142 and ITU-T. K.22 Surges

EN50082-1 Electromagnetic Compatibility – Generic ImmunityStandard Part 1: Residential, Commercial and Light

Industry. Final draft January 1992 (CENELEC)

7.4 Aggregate interface

Conforms to ITU-T Recommendations G.703 and G.704.

Aggregate interface

Bit rate 2048 kbit/s

Time slots per frame 32

Maximum user capacity 31 x 64 kbit/s (1984 kbit/s)

Signalling interfaces

Signalling is implemented according to V5.1 interface protocol as defined in ETSIETS 300 324-1 Specification and in national PSTN mapping.

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7.5 Tributary interfaces

7.5.1 POTS Subscriber Interface Units

Basic signalling, polarity reversal Subscriber metering (12/16 kHz) Ringing cadence

Audio frequency performance

PCM coding ITU-T Rec. G.711

Audio Performance ITU-T Rec. Q.552 (Nov/92)

Sampling rate 8 kHz

Bits per sample 8Compression law ITU-T A law

Maximum transfer delay between audiofrequency and aggregate interface

ITU-T Rec. G.797 (650 µs)

7.5.2 ISDN S/T-interfaces

Electrical characteristics

Line code AMI

Bit rate 192 kbit/s

Bit rate tolerance Locked to multiplexer’s synchronisationfrequency

Supported S-bus configuration Point to point

Short passive bus

Extended passive bus

Termination resistor 100 Ω optional; set with jumpers

Line power feeding characteristics

Nominal voltage 40 V +5% to –15%

Line feed power ≤ 4.5 W

Current limit ≥ 135 mA

Switch-off time 2.25 to 3.75 seconds

Autorestart time after overload 10 seconds

Temperature shut-off > 120 °C

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NTC C33579010SE_00 Copyright Nokia Telecom

ACM2

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