mn00114e.pdf

User manual

Volume 1/1

MN.00114.E – 004

SDH ADD–DROP MULTIPLEXERADM–1

The information contained in this handbook is subject to change without notice.

Property of Siae Microelettronica S.p.A. All rights reserved according to the law and according to the in-ternational regulations. No part of this document may be reproduced or transmitted in any form or by anymeans, electronic or mechanical, without written permission from Siae Microelettronica S.p.A.

Unless otherwise specified, reference to a Company, name, data and address produced on the screendisplayed is purely indicative aiming at illustrating the use of the product.

Microsoft, MS–DOS, Windows, Windows NT and Windows 95 are trademarks of Microsoft Corporation.

Hewlett Packard, HP, HP OpenView Windows, Vectra and HP–UX are Hewlett Packard Company regis-tered trademarks.

OSF Motif is an Open Software Foundation registered trademark.

UNIX is a Unix Systems Laboratories registered trademark.

INGRES is a Computer Associates registered trademark.

Other products cited here in are constructor registered trademarks.

ADM–1 – MN.00114.E – 004 I

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Contents

Section 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . User guide 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

1. WARNING 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2. FIRST AID FOR ELECTRICAL SHOCK AND SAFETY RULES 5. .

2.1 FIRST AID FOR ELECTRICAL SHOCK 5. . . . . . . . . . . . . . . . . . . . . . 2.1.1 Artificial respiration 5. . . . . . . . . . . . . . . . . . . . . . . . . . . 2.1.2 Treatment of burns 5. . . . . . . . . . . . . . . . . . . . . . . . . . .

2.2 SAFETY RULES 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3. PURPOSE AND STRUCTURE OF THE MANUAL 9. . . . . . . . . . . . .

3.1 PURPOSE OF THE MANUAL 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3.2 AUDIENCE BASIC KNOWLEDGE 9. . . . . . . . . . . . . . . . . . . . . . . . . . .

3.3 STRUCTURE OF THE MANUAL 10. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Section 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Description and specifications 13. . . . . . . . . . . . . . . . . . . . . . . . . .

4. LIST OF ABBREVIATIONS 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.1 GENERAL 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4.2 LIST OF ABBREVIATIONS 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents

ADM–1 – MN.00114.E – 004II

5. SYSTEM PRESENTATION 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.1 OVERVIEW 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.2 APPLICATIONS 20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

5.3 MAIN FEATURES 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.1 General 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.2 Configuration options 22. . . . . . . . . . . . . . . . . . . . . . . . . 5.3.3 Aggregate interface 28. . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.4 Tributary interfaces 28. . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.5 Equipment capacity 29. . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.6 Cross–connections 29. . . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.7 Protection schemes 29. . . . . . . . . . . . . . . . . . . . . . . . . . 5.3.8 Monitoring and control 32. . . . . . . . . . . . . . . . . . . . . . . . 5.3.9 Power supply 33. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6. EQUIPMENT TECHNICAL SPECIFICATIONS 35. . . . . . . . . . . . . . . . .

6.1 STANDARDS AND RECOMMENDATIONS 35. . . . . . . . . . . . . . . . . . .

6.2 FRAME CHARACTERISTICS 36. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.3 STM–1 ELECTRICAL INTERFACE 36. . . . . . . . . . . . . . . . . . . . . . . . . .

6.4 STM–1/STM–4 OPTICAL INTERFACE 37. . . . . . . . . . . . . . . . . . . . . . .

6.5 2 Mbit/s INTERFACE (E1) 37. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.6 10/100/1000 Mbit/s ETHERNET INTERFACE 38. . . . . . . . . . . . . . . . .

6.7 34/45 Mbit/s INTERFACE (T3, E3) 41. . . . . . . . . . . . . . . . . . . . . . . . . . .

6.8 64 kbit/s CONTRA–DIRECTIONAL V.11 INTERFACE 41. . . . . . . . . .

6.9 ALARM INTERFACE 42. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.10 NETWORK MANAGEMENT INTERFACE (NMI) 42. . . . . . . . . . . . . . .

6.11 POWER SUPPLY 43. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.12 MECHANICAL STRUCTURE 44. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

6.13 ENVIRONMENTAL CONDITIONS 44. . . . . . . . . . . . . . . . . . . . . . . . . . .

7. EQUIPMENT DESCRIPTION 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.1 GENERAL 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.2 UNPROTECTED CONFIGURATIONS 45. . . . . . . . . . . . . . . . . . . . . . . 7.2.1 4RU version 45. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.2.2 2RU version 46. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.2.3 1RU version 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Inhaltsverzeichnis

ADM–1 – MN.00114.E – 004 III

7.3 EQUIPMENT PROTECTED CONFIGURATIONS 47. . . . . . . . . . . . . . 7.3.1 4RU version 47. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.3.2 2RU version 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.3.3 1RU version 48. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.4 NETWORK PROTECTED CONFIGURATIONS 49. . . . . . . . . . . . . . . 7.4.1 2 Mbit/s end to end traffic protection between PDH and SDH

rings 49. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.5 REDUNDANCY OF TRIBUTARY INTERFACE UNITS 51. . . . . . . . . .

7.6 FUNCTIONAL DESCRIPTION 55. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.6.1 LIU (Line Interface Unit) 55. . . . . . . . . . . . . . . . . . . . . . . 7.6.2 SMU (SDH Multiplexing Unit) 55. . . . . . . . . . . . . . . . . . 7.6.3 MCU (Main Control Unit) 55. . . . . . . . . . . . . . . . . . . . . . 7.6.4 SMCU (SDH Multiplexing and Control Unit) 56. . . . . . 7.6.5 TIU (Tributary Interface Unit) 56. . . . . . . . . . . . . . . . . . 7.6.6 PSU (Power Supply Unit) 56. . . . . . . . . . . . . . . . . . . . .

7.7 UNIT DESCRIPTION 61. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.7.2 SMU (SDH Multiplexing Unit) 62. . . . . . . . . . . . . . . . . . 7.7.3 2 Mbit/s (E1) tributary interface unit 65. . . . . . . . . . . . . 7.7.4 155 Mbit/s (STM1) tributary interface unit 65. . . . . . . . 7.7.5 34/45 (E3/T3) tributary interface unit 68. . . . . . . . . . . . 7.7.6 Ethernet tributary unit interface 70. . . . . . . . . . . . . . . . 7.7.7 MCU (Main Controller Unit) 73. . . . . . . . . . . . . . . . . . . . 7.7.8 Power supply unit 75. . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.7.9 Management Interface Unit (MIU) 76. . . . . . . . . . . . . . 7.7.10 SMCU 77. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.8 EQUIPMENT FACILITIES 82. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.8.2 Alarm indication 83. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7.8.3 User in/Alarm out 83. . . . . . . . . . . . . . . . . . . . . . . . . . . .

7.9 EQUIPMENT SYNCHRONISATION 83. . . . . . . . . . . . . . . . . . . . . . . . .

7.10 SDH OVERVIEW 95. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Section 105. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation 105. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8. EQUIPMENT INSTALLATION 107. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.1 GENERAL 107. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.2 MECHANICAL INSTALLATION 107. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.3 ELECTRICAL WIRING 107. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents

ADM–1 – MN.00114.E – 004IV

9. USER CONNECTORS 109. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9.1 GENERAL 109. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

9.2 AVAILABLE CONNECTORS AND THEIR USE 109. . . . . . . . . . . . . . . .

Section 127. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Line–up 127. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10. EQUIPMENT LINE–UP 129. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10.1 GENERAL 129. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10.2 EQUIPMENT SWITCH–ON 129. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10.3 1+0 TERMINAL MULTIPLEXER EQUIPMENT FUNCTIONALITY TEST 129. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10.4 1+1 OR DROP–INSERT MULTIPLEXER EQUIPMENT FUNCTIONALITY TEST 131. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

10.5 LASER FUNCTIONALITY TEST 132. . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.5.1 Switch–on procedure 132. . . . . . . . . . . . . . . . . . . . . . . . . 10.5.2 Automatic laser shutdown check 132. . . . . . . . . . . . . . .

Section 137. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Maintenance 137. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11. MAINTENANCE GUIDELINES 139. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

11.1 GENERAL 139. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12. UNIT REPLACEMENT 141. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

12.1 UNIT REPLACEMENT 141. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13. ACCESSORIES 143. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

13.1 LIST AND USE OF ACCESSORIES 143. . . . . . . . . . . . . . . . . . . . . . . . .

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ADM–1 – MN.00114.E – 004 V

14. TROUBLESHOOTING 145. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14.1 GENERAL 145. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

14.2 FAULT LOCATION 145. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

15. PROCEDURES TO BACKUP THE FULL EQUIPMENT CONFIGURATION 151. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

15.1 GENERAL 151. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

15.2 CONFIGURATION UPLOAD 151. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

15.3 CONFIGURATION DOWNLOAD 152. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Section 153. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Programming and supervision 153. . . . . . . . . . . . . . . . . . . . . . . . . .

16. EQUIPMENT PROGRAMMING AND SUPERVISION 155. . . . . . . . . . .

16.1 GENERAL 155. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Section 157. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Composition 157. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17. EQUIPMENT COMPOSITION 159. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.1 GENERAL 159. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

17.2 ADM–1 4RU MECHANICAL LAYOUT 159. . . . . . . . . . . . . . . . . . . . . . . . 17.2.1 ADM–1 4RU version configuration list 160. . . . . . . . . . .



Contents

ADM–1 – MN.00114.E – 004VI

ADM–1 – MN.00114.E – 004 1

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1Section

User guide

1. TITOLO DEL CAPITOLOCM.89012.I

CM.89012.I

ADM–1 – MN.00114.E – 0042

ADM–1 – MN.00114.E – 004 3

1. WARNING

The equipment described conforms to the European Directive 1989/336/EEC provided that theequipment installation is performed according to the procedures attached in the present manual.

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1


CM.89012.I

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ADM–1 – MN.00114.E – 004 5

2. FIRST AID FOR ELECTRICALSHOCK AND SAFETY RULES

2.1 FIRST AID FOR ELECTRICAL SHOCK

Do not touch the patient with bare hands until the circuit has been opened. pen the circuitby switching off the line switches. If that is not possible protect yourself with dry material andfree the patient from the conductor.

2.1.1 Artificial respiration

It is important to start mouth resuscitation at once and to call a doctor immediately. suggestedprocedure for mouth to mouth resuscitation method is described in the Tab. 2.1.

2.1.2 Treatment of burns

This treatment should be used after the patient has regained consciousness. It can also beemployed while artificial respiration is being applied (in this case there should be at least twopersons present).

Warning

• Do not attempt to remove clothing from burnt sections

• Apply dry gauze on the burns

• Do not apply ointments or other oily substances.

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2


CM.89012.I

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Tab. 2.1

Step Description Figure

1 Lay the patient on his back with his arms parallel to the body. If thepatient is laying on an inclined plane, make sure that his stomachis slightly lower than his chest. Open the patients mouth andcheck that there is no foreign matter in mouth (dentures, chewinggum, etc.).

2 Kneel beside the patient level with his head. Put an hand underthe patient’s head and one under his neck.

Lift the patient’s head and let it recline backwards as far aspossible.

3 Shift the hand from the patient’s neck to his chin and his mouth,the index along his jawbone, and keep the other fingers closed to-gether. While performing these operations take a good supply ofoxygen by taking deep breaths with your mouth open.

4 With your thumb between the patient’s chin and mouth keep hislips together and blow into his nasal cavities

5 While performing these operations observe if the patient’s chestrises. If not it is possible that his nose is blocked: in that case openthe patient’s mouth as much as possible by pressing on his chinwith your hand, place your lips around his mouth and blow into hisoral cavity. Observe if the patient’s chest heaves. This secondmethod can be used instead of the first even when the patient’snose is not obstructed, provided his nose is kept closed by pres-sing the nostrils together using the hand you were holding hishead with. The patient’s head must be kept sloping backwards asmuch as possible.

6 Start with ten rapid expirations, hence continue at a rate of twelve/fifteen expirations per minute. Go on like this until the patient hasregained conscious–ness, or until a doctor has ascertained hisdeath.


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ADM–1 – MN.00114.E – 004 7

2.2 SAFETY RULES

When the equipment units are provided with the plate, shown in Fig. 2.1, it means that theycontain components electrostatic charge sensitive.

Fig. 2.1

In order to prevent the units from being damaged while handling, it is advisable to wear anelasticised band (Fig. 2.2) around the wrist ground connected through coiled cord (Fig. 2.3).

Fig. 2.2

Elasticized

Ban

d

Fig. 2.3


CM.89012.I

ADM–1 – MN.00114.E – 0048

The units showing the label, shown in Fig. 2.4, include laser diodes and the emitted power canbe dangerous for eyes; avoid exposure in the direction of optical signal emission.

Fig. 2.4

LASER

Attention: Remove the power supply cable before unscrewing and extracting the AC/DC unit(C36087).

Attention: In case of power supply unit C36050 don’t touch the beryllium paste on it.

ADM–1 – MN.00114.E – 004 9

3. PURPOSE AND STRUCTURE OF THEMANUAL

3.1 PURPOSE OF THE MANUAL

The purpose of this manual consists in providing the user with information which permit tooperate and maintain the ADM–1 equipment.

Warning: This manual does not include information relevant to the SCT/LCT managementprogram windows and relevant application. They will be provided by the program itself ashelp–on line.

3.2 AUDIENCE BASIC KNOWLEDGE

The following knowledge and skills are required to operate the equipment:

• a basic understanding of SDH transmission

• installation and maintenance experience on digital system

• a good knowledge of IP/OSI networks and routing policy.


3


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ADM–1 – MN.00114.E – 00410

3.3 STRUCTURE OF THE MANUAL

The manual is subdivided into sections each of them developing a specific topic entitling thesection.

Each section consists of a set of chapters, enlarging the main subject master.

Section 1 – User Guide

It provides the information about the main safety rules and expounds the purpose and thestructure of the manual.

Section 2 – Description and specifications

It traces the broad line of equipment operation and lists the main technical characteristics.

List of abbreviation meaning is also supplied.

Section 3 – Installation

The mechanical installation procedures are herein set down as well as the user electricalconnections.

The content of the tool kit (if supplied) is also listed.

Section 4 – Line–Up

Line–up procedures are described as well as checks to be carried out for the equipment correctoperation. The list of the instruments to be used and their characteristics are also set down.

Section 5 – Maintenance

The routine maintenance actions are described as well as fault location procedures in order toidentify the faulty unit and to re–establish the operation after its replacement with a spare one.


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Section 6 – Programming and supervision

The section supplies the list of programs that may manage the equipment.

The relevant program description is supplied separately as paper form (under specific customerrequest) or as help on–line.

Section 7 – Composition

Position, part numbers of the components the equipment consist of, are shown in this section.


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ADM–1 – MN.00114.E – 004 13


2Section

Description andspecifications


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ADM–1 – MN.00114.E – 004 15

4. LIST OF ABBREVIATIONS

4.1 GENERAL

What follows is the list of abbreviations used in this manual.

4.2 LIST OF ABBREVIATIONS

• Add–Drop Multiplexer

• Alarm indicating signal

• Automatic laser shutdown

• American national standards institute

• Administrative unit

• Bit error rate

• Bit interleaved parity

• Data communication channel

• Electromagnetic interference/Electromagnetic compatibility

• EOW Engineering order wire

• European telecommunication standards institute

• Field programmable gate array

• High order path adaptation


4

ADM

AIS

ALS

ANSI

AU

BER

BIP

DCC

EMI/EMC

ETSI

FPGA

HPA


CM.89012.I

ADM–1 – MN.00114.E – 00416

• High order path termination

• Internet protocol

• International telecommunication union

• Local area network

• Local craft terminal

• Line interface unit

• Link access procedure on D channel

• Local craft terminal

• Logical link control

• Loss of frame

• Loss of pointer

• Low order path adaptation

• Low order connection

• Low order path termination

• Loss of timing input

• Media access control

• Main controller unit

• Management information base

• Management interface unit

• Multilongitudinal mode

• Multiplex section adaptation

• Multiplex section overhead

• Multiplex section protection

• Multiplex section – Shared protection ring

• Multiplex section termination

• Network element

• Network management system

• Operation & maintenance

• Open system interconnect

• Plesiochronous digital hierarchy

HPT

IP

ITU

LAN

LCT

LIU

LPDA

LCT

LLC

LOF

LOP

LPA

LPC

LPT

LTI

MAC

MCU

MIB

MIU

MLM

MSA

MSOH

MSP

MS–SPRing

MST

NE

NMS

O&M

OSI

PDH


CM.89012.I

ADM–1 – MN.00114.E – 004 17

• Performance monitoring

• Path overhead

• Plesiochronous physical interface

• Point to point protocol

• Primary reference clock

• Power supply unit

• Quality level

• Remote alarm indicator

• Remote defect indicator

• Remote error indicator

• Regenerator section overhead

• Regeneration section termination

• Subnetwork craft terminal

• Synchronous digital hierarchy

• Synchronous equipment clock

• Synchronous equipment timing generator

• Synchronous equipment timing source

• SDH multiplexing and main controller unit

• SDH multiplexing unit

• Subnetwork connection protection

• Simple network management protocol

• Synchronous physical interface

• Synchronous status messaging

• Synchronisation supply unit local

• Synchronisation supply unit transit

• Synchronous transport module

• Transport control protocol

• Tributary interface unit

• Tributary switch unit

• Tributary unit group

PM

POH

PPI

PPP

PRC

PSU

QL

RAI

RDI

REI

RSOH

RST

SCT

SDH

SEC

SETG

SETS

SMCU

SMU

SNCP

SNMP

SPI

SSM

SSUL

SSUT

STM

TCP

TIU

TSU

TUG


CM.89012.I

ADM–1 – MN.00114.E – 00418

• User datagram protocol

• Virtual container

• Wait to restore

UDP

VC

WTR

ADM–1 – MN.00114.E – 004 19

5. SYSTEM PRESENTATION

5.1 OVERVIEW

The modern transmission system based on SDH hierarchy permits to make–up network andsubnetwork flexible and expanded where signals pass through at different rates with highreliability. Network elements as line multiplexers (LTM), regenerators, add–drop multiplexers(ADM), synchronous cross connect (SDXC) make part of the network and assure:

• high flexibility

• simplified maintenance

• in–service test

• centralized management.

SIAE ADM–1 family is SIAE’s new generation of STM–1/STM–4 add drop multiplexers. Owingto its flexibility and compactness, SIAE ADM equipment represents the ideal solution foroperators in search of a versatile multi–service provisioning platform for access andmetropolitan SDH networks.

SIAE ADM–1 family belongs to the latest generation of SIAE SDH add drop multiplexers andincludes:

• 4RU (4 rack units) conceived to support STM–1/STM–4 aggregate interfaces with fullyprotected configurations and high Add–Drop capacity.

• 2RU (2 rack units) designed to support STM–1/STM–4 aggregate interfaces inunprotected SDH rings.

• 1RU (1 rack unit) conceived to support STM–1 aggregate interfaces for CustomerPremises applications.


5


CM.89012.I

ADM–1 – MN.00114.E – 00420

5.2 APPLICATIONS

The ADM–1 finds its application both in the access network and in the transport network.

The ADM–1 can be used stand alone, or in conjunction with the SIAE SDH digital radio systems,to implement an SDH access or Metro Ring network as shown in Fig. 5.1.

This network provides transport of 2 Mbit/s, 34/45 Mbit/s Ethernet, IP packets, allowing theelimination of all the intermediate multiplexing stages.

When used in conjunction with the other SIAE 2 Mbit/s Multiplexers the ADM–1 meets thedemand of the customers for a wide variety of services (speech, ISDN, leased lines, fax) andbandwidth.

Moreover the ring structure provides path protection and high availability performance.

Fig. 5.1 ADM–1 typical applications

ADM–1CSTM1 Access Ring

STM4 Access Ring

ADM –1

STM4 Metro Ring

PSTN

L 2

ADM –1ADM –1

ADM –1

ADM –1

ADM –1

ADM –1ADM –1

ADM –1

ADM–1C

ADM–1C

ADM–1CADM–1C

ADM–1STM1 Access Ring

STM4 Access Ring

ADM –1

STM4 Metro Ring

PSTN

L 2

ADM –1ADM –1

ADM –1

ADM –1

ADM –1

ADM –1ADM –1

ADM –1

ADM–1

ADM–1

ADM–1ADM–1

ADM 1


CM.89012.I

ADM–1 – MN.00114.E – 004 21

5.3 MAIN FEATURES

5.3.1 General

SIAE’s ADM–1 family provides a very flexible and modular SDH platform.

In order to offer the best solution for each application in terms of features and price, SIAE’sADM–1 family is available in three different versions.

About this topic, the 4RU represents the most powerful version in terms of multiplexing capacityand protection schemes. It is able to fulfil any Customer requirement in STM–1 and STM–4applications.

Unlike 4RU, the 1RU version has been conceived to provide a cost–effective solution mainlyaddressed to Customer Premises applications.

The 2RU version is an intermediate solution designed to provide a good compromise betweenthe previous versions in terms of flexibility and cost–effectiveness.

In the following figures are shown the three mechanical layout type:

• Fig. 5.2 ADM–1 4RU version in protected configuration equipped with 126xE1interfaces

• Fig. 5.3 ADM–1 2RU version in unprotected configuration equipped with 63xE1interfaces

• Fig. 5.4 ADM–1 1RU version in unprotected configuration equipped with 32xE1interfaces

Fig. 5.2 ADM–1 4RU version


CM.89012.I

ADM–1 – MN.00114.E – 00422



5.3.2 Configuration options

The ADM–1 equipment due to the high versatility and modularity can be used for Terminal,Linear Add–Drop or Ring Add–Drop applications (as shown in Fig. 5.5, Fig. 5.6 and Fig. 5.7).The following configurations are supported:

Tab. 5.1

Configurations Mechanical layout

4RU 2RU 1RU

1+0 terminal multiplexer (see Fig. 5.8) X X X

1+1 double terminal multiplexer (see Fig. 5.9) X X X

1+1 terminal multiplexer with line protection (see Fig. 5.9) X X X

1+1 terminal multiplexer with line, equipment and E1 protection (seeFig. 5.10)

X

1+1 terminal multiplexer with line, equipment and tributary protection (seeFig. 5.11)

X

1+0 drop–insert (see Fig. 5.12) X X X

1+1 drop–insert with line protection (see Fig. 5.13) X

1+1 drop–insert with line, equipment and E1 protection (see Fig. 5.14) X

1+1 drop–insert with line, equipment and tributary protection (see Fig. 5.15) X


CM.89012.I

ADM–1 – MN.00114.E – 004 23

Fig. 5.5 ADM–1 as terminal multiplexer 1+0 or 1+1

STM–1/4 main

STM–1/4 stand–by(1+1)

Tributaryinterfaces

Tributaryinterfaces

Fig. 5.6 ADM–1 as drop/insert

Tributaryinterfaces

Tributaryinterfaces

Drop Insert

Tributaryinterfaces

STM–1/4 west STM–1/4 east

Fig. 5.7 ADM–1 as ring add–drop

STM1 orSTM4 ring

Tributaryinterfaces


CM.89012.I

ADM–1 – MN.00114.E – 00424

ADM–1 terminal configurations

Fig. 5.8 1+0 terminal multiplexer

SMU–M LIU –M STM–n

ADM –1STM–n

Tributaries– E1– E3– STM–1– Ethernet

– management– synchronization

Logical Diagram

TIU

TributaryInterfaces

Block Diagram

––––

––

Fig. 5.9 1+0 double terminal multiplexer and 1+1 terminal multiplexer with lineprotection

SMU–M LIU–M

LIU–M

STM–n

STM–nADM–1

STM–n



Logical DiagramBlock Diagram

––– ––

TIU

TributaryInterfaces


CM.89012.I

ADM–1 – MN.00114.E – 004 25

Fig. 5.10 1+1 terminal multiplexer with line, equipment and E1 protections

SMU–M

SMU–R

LIU– M

LIU– R

TIU

Block Diagram

STM–n

STM–nADM –1

STM–n



Logical Diagram

––––

TributaryInterfaces

Fig. 5.11 1+1 terminal multiplexer with line, equipment and tributary (STM–1, E3/T3,Ethernet) protections

SMU–M

SMU– R

LIU– M

LIU– R

TIU

TIU

Block Diagram

STM–n

STM–nADM –1

STM–n



Logical Diagram

––––

––

TSU

TributaryInterfaces


CM.89012.I

ADM–1 – MN.00114.E – 00426

Fig. 5.12 1+0 drop–insert

Block Diagram

STM–n


– management– synchronization– ............

Logical Diagram

LIU–MLIU–M SMU–M STM–nSTM–n

–n

ADM –1

––– ––

–––

TIU

TributaryInterfaces

STM

Fig. 5.13 1+1 drop–insert with line protection

Block Diagram

STM–n


– management– synchronization– ..............

Logical Diagram

STM–n

LIU–M

LIU–R

LIU–M SMU–M

LIU–R

STM–n

STM–n

STM–n

STM–nADM–1

––––

–––

–1

TIU

TributaryInterfaces


CM.89012.I

ADM–1 – MN.00114.E – 004 27

Fig. 5.14 1+1 drop–insert with line, equipment and E1 tributary protections

Block Diagram

STM–n


– management– synchronization– ...............

Logical Diagram

STM–n

LIU–M

LIU –R

LIU –M

SMU–R

SMU–M

LIU –R

STM–n

STM–n

STM–n

STM–n

ADM–1

–

–––

–

TIU

TributaryInterfaces

Fig. 5.15 1+1 drop–insert with line, equipment and tributary (STM–1, E3/T3, Ethernet)protections

TIU

TSU

Block Diagram

STM–n


– management– synchronization– ..................

Logical Diagram

STM–n

LIU–M

LIU –R

LIU–M

SMU–R

SMU–M

LIU–R

TIU

STM–n

STM–n

STM–n

STM–n

ADM–1

––––

–––

–

–

–1

TributaryInterfaces


CM.89012.I

ADM–1 – MN.00114.E – 00428

5.3.3 Aggregate interface

ADM–1 supports electrical and optical SDH interfaces:

• electrical STM–1 according to ITU–T G.703

• optical STM–1 type I.1, S–1.1, L–1.1, L–1.2 according to ITU–T G.957

• optical STM–4 type I–4, S–4.1, L–4.1, L–4.2 according to ITU–T G.957 (4RU and 2RUversion only).

5.3.4 Tributary interfaces

The ADM–1 enables access to core networks through a broad choice of interfaces:

• 2048 kbit/s (E1) G.703 unbalanced (75 Ohm) or balanced (120 Ohm);

• 34/45 Mbit/s (E3/T3) G.703

• 155 Mbit/s (STM–1) electrical G.703

• 155 Mbit/s (STM–1) optical G.957 type I–1, S–1.1, L–1.1, L–1.2

• Ethernet 2x10/100BaseT + 1x100/1000BaseFx with integrated Layer 2 Ethernetswitch

• Ethernet 2x10/100BaseFx + 1x100/1000BaseFx with integrated Layer 2 Ethernetswitch

The equipment can be provided with different tributary units, yielding a very high level ofconfigurability and modularity. Maximum equipment capacity is indicated in the table below:

Tab. 5.2

Tributaryinterface

E1 STM–1 Ethernet E3/T3

Interfaces per tributary unit

16 2 3 3

Max n. of unit perapparatus

8 4 2 4 4 1 4 4 2 4 4 2

Max interfacesper apparatus

126 63 32 8 8 2 12 12 6 12 12 6

Mechanical layout 4RU 2RU 1RU 4RU 2RU 1RU 4RU 2RU 1RU 4RU 2RU 1RU


CM.89012.I

ADM–1 – MN.00114.E – 004 29

5.3.5 Equipment capacity

The features and characteristics related to the different versions are reported in the followingtable:

Tab. 5.3

Mechanical layout

4RU 2RU 1RU

Aggregate interfaces 4x STM1 or 4xSTM4 2xSTM1 or 2xSTM4 2xSTM1

Multiplexing capacity up to 2xSTM1 or up to 2xSTM4

up to 2xSTM1 or up to 2xSTM4

up to 2xSTM1

Tributary capacity up to 2xSTM1 or up to 2xSTM4

up to 2xSTM1 or up to 2xSTM4

up to 1xSTM1

5.3.6 Cross–connections

The following cross–connections are available:

• higher order, at VC4 path level, for STM4 application

• lower order, at VC12 and VC3 path level, for STM–1 and STM–4 applications.

The types of cross–connections are the following:

• aggregate to aggregate

• tributary to tributary

• aggregate to tributary.

In case of cross–connection between tributaries, they must be compleately configured, thatmeans they must be enabled with signal label set as “asynchronous”.

5.3.7 Protection schemes

Different automatic protections are implemented in the equipment in order to meet the followingredundancy requirements:

Network protection


CM.89012.I

ADM–1 – MN.00114.E – 00430

• MSP (Multiplex Section Protection)

• SNCP (SubNetwork Connection Protection), on E–W aggregate streams

• 2 Mbit/s end to end traffic protection, between PDH and SDH rings.

In case of SIAE PDH/SDH interconnecting rings, protection is given to PDH ring byembedding the alarms from each framed/unframed 2 Mbit/s signal of the PDH path intothe ADM–1 VC12s belonging to the SDH ring.

In case of partially or non completely SIAE PDH/SDH interconnecting rings, PDHprotection is given by inserting between PDH/SDH meeting points two additionalADM–1 which embedded the alarms from the PDH ring, into the STM–1 frame. Thislatter is then propagated into the SDH ring through a 155 Mbit/s tributary interface.

Fig. 5.16 shows the two different applications.

• MS–SPRing (Multiple–Section – Shared Protection Ring), in case of STM–4 aggregatesignals.

Equipment protection

• SMU (SDH Multiplexing Unit), with SETS and cross–connect functionality inside 1

• tributary 1

• line

• power supply.

1. Available on 4RU version only


CM.89012.I

ADM–1 – MN.00114.E – 004 31

Fig. 5.16 PDH ring protection using SIAE equipment

ADM–1

SDH Ringusing SIAE ADMs

PDH Ring

PDHADM–1

ADM–1

ADM–1

ADM–1

ADM–1

PDH

PDH

PDH

PDH

2Mbit/s incoming streamMonitoring andalarm forcing on thePOH SDH bytes

SDH Ringusing existing ADMs

PDH Ring

PDHPDH

PDH

PDH

PDH

ADM–1

ADM–1

ADM

ADM

ADM

ADM

ADM

2 Mbit/s

2 Mbit/s

2 Mbit/s

2 Mbit/s

2 Mbit/s

2 Mbit/s

2 Mbit/s155 Mbit/s

2 Mbit/s


CM.89012.I

ADM–1 – MN.00114.E – 00432

5.3.8 Monitoring and control

ADM–1 allows local and remote management thanks to an embedded SNMP agent. Dependingin network type and customer requirements, ADM equipment can be provided with two typesof protocol stacks: a “Full IP” stack or an “OSI+IP” stack. When implementing OSI+IP stacks,layers 1 to 3 comply with recommendations ITU–T Q.811, Q.812 and G.784.

Several software solutions for local and centralized management are available:

• LCT (Local Craft Terminal) for maintenance and line–up activities (MS Windows OS)

• SCT (Subnetwork Craft Terminal) for centralised management of up to 100 NEs (MSWindows OS)

• NMS5–LX (Element Manager) for centralised management of medium networks withup to 750 NEs per server (Linux OS)

• NMS5–UX (Element Manager) for centralised management of large networks with upto 2500 NEs per server (HP Unix OS and HP OpenView platform).

For a detailed description of SIAE supervision software platforms, please refer to the relativeproduct literature.

Fig. 5.17


CM.89012.I

ADM–1 – MN.00114.E – 004 33

5.3.9 Power supply

ADM–1 can be equipped with one or two PSU units, depending on the mechanical arrangement.

One power supply unit may satisfy the equipment complete power requirement, while the twopower supply units are in 1+1 redundance configuration, i.e. within the equipment the outputlines are OR–ed together.

Input voltage range and power consumption are indicated in the table below.

Tab. 5.4

Mechanicallayout

Input voltage Input current(max)

Power consumption(fully equipped)

4RU –48/–60 Vdc; –15 % +20% 1.25 A 50 Watts

2RU –48/–60 Vdc; –15% +20% 0.8 A 30 Watts

1RU –24 Vdc; –15% +20%–48/–60 Vdc; –15%+20%90 to 254 Vac, 50/60 Hz

1 A0.5 A0.4 A

20 Watts


CM.89012.I

ADM–1 – MN.00114.E – 00434

ADM–1 – MN.00114.E – 004 35

6. EQUIPMENT TECHNICALSPECIFICATIONS

6.1 STANDARDS AND RECOMMENDATIONS

• ITU–T G.707 Network node interface for the synchronous digital hierarchy (SDH)

• ITU–T G.782 Types and General Characteristics of Synchronous Digital Hierarchy(SDH) Multiplexing Equipment

• ITU–T G.783 Characteristics of synchronous digital hierarchy (SDH) equipment functional block

• ITU–T G.784 Synchronous digital hierarchy (SDH) management

• ITU–T G.703 Electrical characteristics of 2 Mbit/s, 34 Mbit/s, 155 Mbit/s aggregateinterfaces

• ITU–T G.826 Characteristics of performance monitoring statistics

• ITU–T G.957 Optical interfaces for equipment and systems relating to the synchronous digital hierarchy

• ITU–T G.958 Digital Line Systems Based on the Synchronous Digital Hierarchy forUse on Optical Fibre Cables

• ITU–T G.823 Jitter characteristics of the digital network

• ITU–T G.803 Architectures of the Transport Networks Based on the SDH

• ITU–T G.813 Timing characteristics of SDH equipment slave clocks (SEC)

• ITU–T G.825 The control of jitter and wander within digital networks which are based on the synchronous digital hierarchy (SDH)

• EN 300 132–2 Power supply interface at the input of telecommunication equipment

• EN 300 132–3 Power supply interface at the input of telecommunication equipment

• EN 300 019 Environmental conditions and environmental test for telecommunication equipment

• EN 300 119 European telecommunication standard for equipment practice

• EN 300 147 Transmission and Multiplexing Synchronous Digital Hierarchy Multiplexing Structure


6


CM.89012.I

ADM–1 – MN.00114.E – 00436

• EN 300 386 Electro–Magnetic Compatibility (EMC) requirements

• ITU–T G.742 2 Mbit/s interface transfer function

• ITU–T G.751 34 Mbit/s interface transfer function

• EN 300 417–6 Synchronisation

6.2 FRAME CHARACTERISTICS

• 155.520 Mbit/s (STM–1)622,080 Mbit/s (STM–4)

• STM–1 frame via multiplexing of three TUG–3and/or TU3 in a single AU4STM–4 frame via multiplexing of four AUG4

• VC–12/VC3 (STM–1)VC4 (STM–4)

6.3 STM–1 ELECTRICAL INTERFACE

Input side

• 155520 kbit/s ± 4.6 ppm

• CMI

• 75 ohm

• 1 Vpp ± 0.1 V

• ≥ 15 dB from 8 MHz to 240 MHz

• 12.7 dB at 78 MHz ( �� trend)

Output side

• 155520 kbit/s ±4.6 ppm

• 1 Vpp ± 0.1 V

• see mask of Figure 24 and 25 of CCITT Rec.G703

Speed rate

Frame structure

Cross–connect levels

Bit rate

Line code

Rated impedance

Rated level

Return loss

Max attenuation of the input cable

Bit rate

Rated level

Pulse shape


CM.89012.I

ADM–1 – MN.00114.E – 004 37

6.4 STM–1/STM–4 OPTICAL INTERFACE

The optical interface can be specialized for different applications, by simply equipping theSTM–1 (or STM–4) optical unit (LIU) with the appropriate pluggable transceiver (with LC opticalconnectors). Information about the presence/absence and type of transceiver is transferred tothe main controller. The characteristics of all the possible optical interfaces are summarized inthe following table:

Tab. 6.1

Interface Referen-ce

Launched

power(dBm)

Mini-mum

sensiti-vity

(dBm)

Operatingwave-length

Tran-scei-ver

Fiber Distance(km)

L–1.2 G.957 0 ... –5 –34 1480–1580 Laser Single-Mode

Up to 80

L–4–2 +2 ... –3 –28

L–1.1 G.957 0 ...–5 –34 1263–1360 Laser Single-Mode

Up to 40

L–4–1 +2 ... –3 –28 1280–1335

S–1.1 G.957 –8 ...–15 –28 1263–1360 Laser Single-Mode

Up to 15

S–4–1 –8 ... –15 –28 1274–1356

I–1 ANSI –14 ...–20 –28 1263–1360 LED MultiMo-de

Up to 2

I–4 G.957 –8 ...–15 –23

LIUs are provided with Automatic Laser Shutdown functionality as prescribed by ITU–T G.664Recommendation.

6.5 2 Mbit/s INTERFACE (E1)

Input side

• 2048 kbit/s ± 50 ppm

• HDB3

• 75 ohm or 120 ohm

• 2.37 Vp/75 Ohm or 3 Vp/120 Ohm

Bit rate

Line code

Rated impedance

Rated level


CM.89012.I

ADM–1 – MN.00114.E – 00438

• 12 dB from 57 kHz to 102 kHz18 dB from 102 kHz to 2048 kHz14 dB from 2048 kHz to 3072 kHz

• 6 dB according to �� trend

• see mask in Table 2, CCITT Rec. G.823

• see mask in Figure 1, CCITT Rec. G742

• Rec. G.783 (Table 10.1 (4/97))

Output side

• 2048 kbit/s ± 50 ppm

• 75 Ohm or 120 Ohm

• 2.37 Vp/75 Ohm or 3 Vp/120 Ohm

• see mask in Figure 15, CCITT Rec. G.703

6.6 10/100/1000 Mbit/s ETHERNET INTERFACE

• 10 Mbit/s or 100 Mbit/s or 1 Gbit/s

• 290 Mbit/s max

• GFP

• Virtual concatenation: Nx VC12 or Nx VC3

• Rapid STP

• 100BaseFx or 1000BaseSx or 1000BaseLx

• LC

• 10BaseT or 100BaseT

•

Return loss


Accepted jitter

Transfer function

Output jitter

Bit rate

Rated impedance

Rated level

Pulse shape

Bit rate

WAN throughput

Frame

Concatenation

Bridge loop avoidance

Optical user interface

Optical connector

Electrical user interface

Electrical connector


CM.89012.I

ADM–1 – MN.00114.E – 004 39

Switch characteristics

Tab. 6.2

Parameter Value Notes

User ports (external) 3 Two: 10/100 + One: 100/1000

WAN ports (internal) 3 With a 290 Mbit/s total capacity

Mode Half/full duplexFull duplex

For 10/100 eletricalFixed for 100/1000 electrical

Address learning capacity 8K Globally for the switch

MAC aging time 0÷1 hour 15 sec steps software configurable

802.1Q VLANs Up to 4095 Software configurable

Port based VLAN Yes/Not Software configurable

Packet buffer memory 1 Mbit Globally for the switch

Max frame size 1632 Bytes Software configurable between stan-dard or extended

Ethernet output queue 4 Fixed

Weight queues Strictly/weighted Software configurable

QoS None/802.1p/TOS–DSCP Software configurable

Layer 2 flow control Yes/Not Software configurable

MDI/MDX (electrical) Yes/Not Software configurable

100BaseFx optical interface characteristics

• Multimode 50/125 µm or 62.5/125 µm

• Pluggable

• LC

• up to 2 km

• 1310 nm

• –14 ÷ –22 dBm

• –29 dBm

• –14 dBm

• 7 dB

• 100BaseFx as for IEEE 802.3

Fiber type

Transceiver type

Connector type

Operating distance

Optical center wavelength

Optical transmit power

Receive sensitivity

Average receive power max

Link power budget

Compliance


CM.89012.I

ADM–1 – MN.00114.E – 00440

1000BaseSx optical interface characteristics

• Multimode 50/125 µm or 62.5/125 µm

• Pluggable

• LC

• up to 550 m (50/125 µm) or up to 300 m (62.5/125µm)

• 850 nm

• –2 ÷ –9.5 dBm

• –17 dBm

• 0 dBm

• 7.5 dB

• 1000BaseSx as for IEEE 802.3z

1000BaseLx optical interface characteristics

• Singlemode 9/125 µm

• Pluggable

• LC

• up to 10 km

• 1310 nm

• –3 ÷ –9.5 dBm

• –19 dBm

• –3 dBm

• 9.5 dB

• 1000BaseLx as for IEEE 802.3z

Fiber type

Transceiver type

Connector type

Operating distance



Receive sensitivity


Link power budget

Compliance

Fiber type

Transceiver type

Connector type

Operating distance



Receive sensitivity


Link power budget

Compliance


CM.89012.I

ADM–1 – MN.00114.E – 004 41

6.7 34/45 Mbit/s INTERFACE (T3, E3)

Input side

• 34368 kbit/s or 44736 kbit/s ± 20 ppm

• HDB3

• 75 Ohm

• 1.0 Vp/75 Ohm

• 12 dB from 860 kHz to 17200 kHz18 dB from 17200 kHz to 34368 kHz14 dB from 34368 kHz to 51550 kHz

• 12 dB at 17184 kHz according to �� trend

• see mask in Table 2, CCITT Rec. G.823

• see mask in Figure 2, CCITT Rec. G751

• 0.3 U.I from 0 Hz to 800 kHz0.05 U.I. from 10 kHz to 800 kHz

Output side

• 34368 kbit/s or 44736 kbit/s ± 20 ppm

• 75 Ohm

• 1.0 Vp/75 Ohm

• see mask in Figure 17, CCITT Rec. G.703

6.8 64 kbit/s CONTRA–DIRECTIONAL V.11 INTERFACE

• ± 100 ppm

• contra–directional

• clock and data on independent wire

• see Rec. CCITT V.11

Bit rate

Line code

Rated impedance

Rated level

Return loss


Accepted jitter

Transfer function

Output jitter

Bit rate

Rated impedance

Rated level

Pulse shape

Tolerance

Equipment side

Coding

Electrical interface


CM.89012.I

ADM–1 – MN.00114.E – 00442

6.9 ALARM INTERFACE

User output

• normally open (NO) or normally closed (NC)

• 100 Mohm at 500 Vdc

• 0.5 Ohm

• 100 V

• 1 A

User input

• 200 Ohm resist. (max) referred to –6 V (min)

• 60 kohm (min) referred to +4 V (max)

6.10 NETWORK MANAGEMENT INTERFACE (NMI)

AUI interface

• 15 pin SUB–D

• with a branching cable and a transceiver toEthernet Thick coaxial cable or 10BaseT

• TCP/IP or OSI

10BaseT

• Ethernet Twisted Pair 802.3 10baseT

• RJ45

• direct with a CAT5 Twisted Pair

• TCP/IP or OSI

Relay contacts

Open contacts R min.

Closed contacts R max.

Switching voltage V max.

Switching current I max.

Equivalent circuit recognized as aclosed contact

Equivalent circuit recognized asan open contact

Connector

Connection to LAN

Protocol

LAN type

Connector

Connection to LAN

Protocol


CM.89012.I

ADM–1 – MN.00114.E – 004 43

10Base2

• Coax

• direct with standard coaxial cable

• TCP/IP or OSI

RS232 interface

• V.28

• 9600, 19200, 38400, 57600

• PPP

• Client, Automatic (IP Address assigned byequipment)

SCT interface

• V.28

• 9600, 19200, 38400, 57600

• PPP

• Automatic (IP Address assigned by equipment)

6.11 POWER SUPPLY

One or two power supplies can be inserted into the ADM–1 shelf depending on the mechanicalarrangement for duplicated or unduplicated powering.

Tab. 6.3

Mechanicallayout

Input voltage Input current(max)

Power consumption(fully equipped)

4RU –48/–60 Vdc; –15 % +20% 1.25 A 50 Watts

2RU –48/–60 Vdc; –15% +20% 0.8 A 30 Watts

1RU –24 Vdc; –15% +20%–48/–60 Vdc; –15%+20%90 to 254 Vac, 50/60 Hz

1 A0.5 A0.4 A

20 Watts

Connector

Connection to LAN

Protocol


Asynchronous baud rate

Protocol

PPP mode


Asynchronous baud rate

Protocol

PPP mode


CM.89012.I

ADM–1 – MN.00114.E – 00444

6.12 MECHANICAL STRUCTURE

The equipment practice complies with EN 300 119–4 standards for mechanical and EMI/EMCspecifications. The equipment mechanical structure has the following dimensions:

Tab. 6.4

4RU 2RU 1RU

Height 160 mm 90 mm 44.4 mm

Width 480 mm 480 mm 480 mm

Depth 240 mm 240 mm 240 mm

Access to each unit in the shelf is possible from the front side. All connectors are placed on thefront of the relevant units.

6.13 ENVIRONMENTAL CONDITIONS

The equipment is compliant with the following standards:

• Storage: EN 300 019–1–1, Class 1.2 (weatherprotected, partlytemperature–controlled location)

• Temperature range: –25° C to +55° C

• Transport: EN 300 019–1–2, Class 2.3 (public transportation)

• Temperature range: –40° C to +70° C

• Operation: EN 300 019–1–3, Class 3.2 (Partly temperature– controlled locations)

• Temperature range: –5° C to +45° C normalRel. humidity: less than 95%

ADM–1 – MN.00114.E – 004 45

7. EQUIPMENT DESCRIPTION

7.1 GENERAL

The ADM–1 equipment can be configured for terminal, linear add–drop or ring add–dropapplications, in unprotected or protected configurations. All the configurations use the sameunits, only quantity can be different; this allow the user to expand easily and at any time thesystem from unprotected to protected configuration.

7.2 UNPROTECTED CONFIGURATIONS

7.2.1 4RU version

The following configurations are supported:

• 1+0 terminal multiplex with up to 63 E1 tributary interfaces. In the terminal version all channels are assigned to a single STM1/STM4 aggregate.The equipment of common parts is typical for a terminal MUX: one or two PSU, oneLIU, one SMU, a MCU. The ADM–1 can be equipped with many tributary interfaces,with a maximum of 63x2 Mbit/s.

• 1+0 double terminal multiplexer with up to 63 E1 tributary interfaces.In the double terminal version part of the channels are assigned to the West sideaggregate, part to the East side.The equipment of common parts is the same as in the 1+0 terminal multiplexer. TheADM–1 can be equipped with many tributary interfaces, with a maximum of63x2Mbit/s.

• 1+0 double terminal multiplexer with up to 126 E1 tributary interfaces.In the double terminal version part of the channels are assigned to the west sideaggregate, part to the East side.


7


CM.89012.I

ADM–1 – MN.00114.E – 00446

The equipment of common parts is the same as in the 1+0 terminal MUX with anadditional SMU (needed for the additional 2 Mbit/s terminations). The ADM can beequipped with many tributary interfaces, with a maximum of 126x2 Mbit/s.

• 1+0 drop–insert with up to 63 E1 tributary interfaces.In the repeater version, both direct digital transit of individual channels and local usewith the capability of extracting or inserting up to 63x2 Mbit/s channels are possible.The VC used in the frame can be chosen by software programming. The basic commonequipment is the same as in the 1+0 terminal MUX. The ADM–1 can be equipped withmany tributary interfaces, with a maximum of 63x2 Mbit/s.

• 1+0 drop–insert with up to 126 E1 tributary interfaces. In the repeater version, bothdirect digital transit of individual channels and local use with the capability of extractingor inserting up to 126x2Mbit/s channels are possible.The equipment of common parts is the same as in the 1+0 terminal MUX with anadditional SMU (needed for the additional 2Mbit/s terminations). The ADM–1 can beequipped with many tributary interfaces, with a maximum of 126x2Mbit/s.

The power supply can be duplicated in all the above mentioned configurations.

Fig. 7.10 shows the equipment general block diagram. It evidences the units described in theparagraph 7.7.

7.2.2 2RU version


• 1+0 terminal multiplex with up to 63 E1 tributary interfaces. In the terminal version all channels are assigned to a single STM1/STM4 aggregate.The equipment of common parts is typical for a terminal MUX: one or two PSU, oneLIU, one SMU, a MCU. The ADM–1 can be equipped with many tributary interfaces,with a maximum of 63x2 Mbit/s.

• 1+0 double terminal multiplexer with up to 63 E1 tributary interfaces.In the double terminal version part of the channels are assigned to the West sideaggregate, part to the East side.The equipment of common parts is the same as in the 1+0 terminal multiplexer. TheADM–1 can be equipped with many tributary interfaces, with a maximum of63x2Mbit/s.

• 1+0 drop–insert with up to 63 E1 tributary interfaces.In the repeater version, both direct digital transit of individual channels and local usewith the capability of extracting or inserting up to 63x2 Mbit/s channels are possible.The VC used in the frame can be chosen by software programming. The basic commonequipment is the same as in the 1+0 terminal MUX. The ADM–1 can be equipped withmany tributary interfaces, with a maximum of 63x2 Mbit/s.

The power supply can be duplicated in all the above mentioned configurations.

Fig. 7.11 shows the equipment general block diagram. It evidences the units described on theparagraph 7.7.


CM.89012.I

ADM–1 – MN.00114.E – 004 47

7.2.3 1RU version


• 1+0 terminal multiplex with up to 32 E1 tributary interfaces.In the terminal version all channels are assigned to a single STM1 aggregate. Theequipment of common ports is typical for a terminal MUX: one PSU, one LIU, oneSMCU. The ADM–1 can be equipped with many tributary interfaces, with a maximumof 32x2 Mbit/s.

• 1+0 double terminal multiplexer with up to 32 E1 tributary interfaces.In the double terminal version part of the channels are assigned to the West sideaggregate, part to the East side.The equipment of common parts is the same as in the 1+0 terminal multiplexer. TheADM–1 can be equipped with many tributary interfaces, with a maximum of 32x2Mbit/s.

Fig. 7.12 shows the equipment general block diagram. It evidences the units described on theparagraph 7.7.

7.3 EQUIPMENT PROTECTED CONFIGURATIONS

7.3.1 4RU version

The equipment can be partially or fully protected by duplicating the LIU, the SMU, the PSU andthe tributary units. For the tributary protection please also refer to 7.5.


• 1+1 terminal multiplexer with line protection.The line protection is obtained by using the second interface (East) of the same LIU.The equipment of common parts is the same as in the 1+0 terminal multiplexer, but withthe two LIU interfaces enabled. The ADM–1 can be equipped with many tributaryinterfaces, with a maximum of 63x2 Mbit/s.

• 1+1 terminal multiplexer with line and equipment protection.This kind of protection requires the use of two LIU and two SMU units. The equipmentcan work with a maximum of 63x2 Mbit/s in protected configuration. Other types oftributaries can be used in unprotected or “simple unit redundancy” configuration

• 1+1 terminal multiplexer with line, equipment and tributary protection.This kind of protection requires the same configuration as for the “1+1 terminalmultiplexer with line and equipment protection” with the addition of a TSU switch forthe STM–1, E3/T3, Ethernet tributaries. The 2 Mbit/s tributaries are protected (max.63) without the need of a TSU switch.The STM–1, E3/T3, Ethernet tributaries can be protected in “unit redundancy withswitch” type.


CM.89012.I

ADM–1 – MN.00114.E – 00448

• 1+1 drop–insert with line protection.This kind of protection requires the use of two LIU and one SMU unit. The ADM–1 canbe equipped with many tributary interfaces, with a maximum of 63x2 Mbit/s.

• 1+1 drop–insert with line and equipment protection.This kind of protection requires the use of two LIU and two SMU units. The equipmentcan work with a maximum of 63x2 Mbit/s in protected configuration. Other types oftributaries can be used in unprotected or “simple unit redundancy” configuration

• 1+1 drop–insert with line, equipment and tributary protection.The kind of protection requires the same configurations as for the “1+1 drop–insert withline and equipment protection” with the addition of a TSU switch for the STM–1, E3/T3,Ethernet tributaries. The 2 Mbit/s tributaries are protected (max. 63) without the needof a TSU switch.The STM–1, E3/T3, Ethernet tributaries can be protected in “unit redundancy withswitch” type.

The power supply can be duplicated in all the above mentioned configurations. Fig. 7.13 showsthe fully protected configuration with 63x2 Mbit/s tributaries (1+1 terminal or drop–insertmultiplexer with line, equipment and tributary protection).

7.3.2 2RU version

The following configuration is supported:

• 1+1 terminal multiplexer with line protection.The line protection is obtained by using the second interface (east) of the same LIU.The equipment of common parts is the same as in the 1+0 terminal multiplexer. but withthe two LIU interfaces enabled. The ADM–1 can be equipped with many tributaryinterfaces, with a maximum of 63x2 Mbit/s.The power supply can be duplicated.

7.3.3 1RU version

The following configuration is supported:

• 1+1 terminal multiplexer with line protection.The line protection is obtained by using the second interface (east) of the same LIU.The equipment of common partes is the same as in the 1+0 terminal multiplexer, butwith the two LIU interfaces enabled. The ADM–1 can be equipped with many tributaryinterfaces, with a maximum of 32x2 Mbit/s.


CM.89012.I

ADM–1 – MN.00114.E – 004 49

7.4 NETWORK PROTECTED CONFIGURATIONS

The following automatic protections are implemented in order to meet network redundancyrequirements:

• MSP (1+1 equipment configuration is required)

• SNCP (Subnetwork Connection Protection), on E–W aggregate streams

• 2 Mbit/s end to end traffic protection between PDH and SDH

• MS–SPR, in case of STM–4 aggregate signal.

7.4.1 2 Mbit/s end to end traffic protection between PDH and SDH rings

As introduced in chapter 5.2 and relevant Fig. 5.2, the equipment provides protection to 2 Mbit/send to end traffic between PDH and SDH rings.

As shown in Fig. 7.1 the performances of each 2 Mbit/s tributary signal coming from the PDHpath and entering into the SDH ring is monitored at the SMU unit input. In case of 2 Mbit/s troublethe relevant generated alarm signals are embedded in the VC12 POH and then into the STM–1frame. This action permits to enable the SNCP protection at SDH ring end by switching theVC12s.

Fig. 7.2 shows the 2 Mbit/s alarms details, SDH consequent action, and alarm/switchingactivation time.


CM.89012.I

ADM–1 – MN.00114.E – 00450

Fig. 7.1 2 Mbit/s monitoring and alarm insertion

ST

M–1

inte

rfac

e

PPIPlesiochronous

Physical Interface

LPALower order

Path Adaptation

LPTLower order

Path Termination

2 Mbit/s alignmentand monitor

To alarminterface

ST

M–1

inte

rfac

e

SDH multiplexing

functions

2 Mbit/stributaryinput #1

2 Mbit/stributaryinput #n

2 Mbit/s 2 Mbit/s Alarms SDH consequent actions PDH+SDH alarmactivation time

2 Mbit/sG.704Framed

CRC Error Parity errors forced on the POH(BIP–2 of the V5 byte)

SDH BER Threshold dependent

BER 10–6 (CRC4/G.704) TU–AIS (optional) 10 sec

Loss of Signal (LOS)Loss of Frame (LOF)Received AIS

TU–AIS(All “1” forced in the wholeTU–12, including the TU–12Pointer)

≤1,5 msec

2 Mbit/s unframed

Loss of Signal (LOS)Received AIS

TU–AIS(All “1” in the whole TU–12, inclu-ding the TU–12 Pointer)

≤1,5 msec

Fig. 7.2 2 Mbit/s alarm monitoring and consequent SDH action


CM.89012.I

ADM–1 – MN.00114.E – 004 51

7.5 REDUNDANCY OF TRIBUTARY INTERFACE UNITS

The ADM–1 provides equipment protection also to the tributary interface units (see Fig. 7.9):

• Protection for E1 tributary

This protection is available on 4RU version only.

The redundancy is achieved by duplicating the SMU unit; a switch on the TIU unitselects the E1 tributary traffic from the two SMU units according to unit status andnetworks alarms.

Fig. 7.3

TIU

SMU – R

SMU – M

Tributary(only E1)

Aggregate

Aggregate

• Protection for STM–1, E3/T3 and Ethernet tributaries

Two types of protection are foreseen:

– Simple unit redundancy: this protection is available in all the RU versions. Full unitduplication (including physical interfaces with connectors) is achieved. The twounits work independently. The cross–connect (within the SMU/SMCU) selects theactive unit according to unit status and network alarms.

Fig. 7.4

TIUSMU

TIU

Tributary

TributaryAggregate

SMCU


CM.89012.I

ADM–1 – MN.00114.E – 00452

– Unit redundancy with switch: This protection is available on 4RU version only. Thetwo tributary interface units in redundancy are connected through a switch (TSU– Tributary Switching Unit) that selects the tributary traffic from the two unitsaccording to unit status and network alarms.

Fig. 7.5

TSU

TIUSMU

TIU

TributaryAggregate

7.5.1 Equipment of tributary units slots (for 4RU version only)

See Fig. 7.9.

The first four TIU slots can house E1 tributaries only. The last four slots can instead be equippedwith any TIU type (i.e. E1, E3/T3, STM–1 and Ethernet) enabling any mixture of interfaces. Thenext figures show some examples of possible configurations.

• 126xE1 unprotected configuration

Fig. 7.6

TIU(E1)

TIU(E1)

TIU(E1)

TIU(E1)

TIU(E1)

TIU(E1)

TIU(E1)

TIU(E1)


CM.89012.I

ADM–1 – MN.00114.E – 004 53

• 63xE1 protected (unprotected in case of a single SMU) + 3x10/100BaseT + 3xE3 +2xSTM–1 (with TIU protection) configuration

Fig. 7.7

Simple Unit Redundancy

TU(E1)

TU(E1)

TU(E1)

TU(E1)

TU cove

r

cove

r

cove

r

(Eth

) TU

(E3) TU

(ST

M–1)

TU

(ST

M–1)

TIU(E1)

TIU(E1)

TIU(E1)

TIU(E1)

TIU cover

cover

cover

cover

(Eth

) TIU

(E3)

TIU(ST

M

–1)

TIU(ST

M

–1)

– 48xE1 + 3x10/100BaseT (with TIU protection) and 2xSTM–1 (with TIU protection)configuration

Fig. 7.8

Unit Redundancy with Switch

TU(E1)

TU(E1)

TU(E1)

cove

r

TU TSU

cove

r

TSU cove

r

(Eth

) TU

(Eth

) TU

(ST

M–1)

TU

(ST

M–1)

TIU(E1)

TIU(E1)

TIU(E1)

cover

TIU

TS

U

cover

TS

U

cover

(Eth)

TIU(Eth)

TIU TIU(ST

M

–1)

(ST

M

–1)


CM.89012.I

ADM–1 – MN.00114.E – 00454

Fig. 7.9 Redundancy of tributary units

TIU TIU TIU TIU PSUM PSU–R

SMU–M SMU–R

MCU LIU– M LIU–R

MIUTIU TIU TIU TIU

TIU TIU TIU TIU TIU TIU TIU TIU TIU TIU TIU TIU

TSUCover Cover CoverCover CoverCover

E1 Tributary in 1+0 configurationfor expansion from 64 to 126

E3/T3 or STM1 or Ethernet Tributaryin 1+0 configuration or

”Simple Unit Redundancy”

E3/T3 or STM1 or Ethernet TributaryIn ”Unit Redundancy configuration

TU TU TU TU PSU–M PSU–R

SMU–M

M SMU–R

MCU LIU–M LIU–R

MIUTU TU TU TU

Up to 63 E1 Tributary in 1+0 or ” Redundancy configuration”

TIU TIU TIU TIUTIU TIU TIU TIU

–

with switch”

switchTSUswitch


CM.89012.I

ADM–1 – MN.00114.E – 004 55

7.6 FUNCTIONAL DESCRIPTION

Fig. 7.10 to Fig. 7.13 show the block diagram of the different ADM–1 equipment version. Theyevidence the units below described.

7.6.1 LIU (Line Interface Unit)

This unit provides two aggregate interfaces, East/West sides, to the STM–1/STM–4 signal. TheSPI may be electrical or optical in alternative.

7.6.2 SMU (SDH Multiplexing Unit)

This unit provides the following:

• STM–1 mapping/demapping as per G.707 Recc.

• Cross–connection for virtual containers VC12 and VC3:

– from direction E/W to direction W/E

– from the tributary lines to E/W direction and viceversa

– from tributary lines to tributary lines

The maximum cross–connection capability is 12xSTM1.

• The timing to all the equipment functional blocks by selecting four possible externalsynchronisation sources.Hold–over and free running modes are also available according to Recs. G.810/G.813.

7.6.3 MCU (Main Control Unit)

This unit provides monitoring and controls of all equipment functional blocks. The man–machinedialogue is performed through the SCT/LCT or NMS5UX managers. In addition the controllerprovides:

• a 64 kbit/s service channel, transmitted over the F1 byte of the STM1 frame.


CM.89012.I

ADM–1 – MN.00114.E – 00456

7.6.4 SMCU (SDH Multiplexing and Control Unit)

This unit provides the following:

• STM–1 mapping/demapping as per G.707 Recc.

• Cross–connection for virtual containers VC12 and VC3:

– from direction E/W to direction W/E

– from the tributary lines to E/W direction and viceversa

– from tributary lines to tributary lines

The maximum cross–connection capability is 12xSTM1.

• The timing to all the equipment functional blocks by selecting four possible externalsynchronisation sources.Hold–over and free running modes are also available according to Recs. G.810/G.813.

• Monitoring and controls of all equipment functional blocks. The man–machine dialogueis performed through the SCT/LCT or NMS5UX managers,In addition the controller provides a 64 kbit/s service channel transmitted over the F1byte of the STM1 frame.

7.6.5 TIU (Tributary Interface Unit)

The equipment can be equipped with different tributary interface types:

• 2 Mbit/s tributary interface (E1): each unit can provide up to sixteen 2 Mbit/s interface.The tributary impedance is 75 Ohms or 120 Ohms

• 3x34/45 Mbit/s tributary interface (T3, E3), G.703

• 2xSTM–1 G.703 electrical or G.957 optical

• Ethernet 2x10/100BaseT + 1x100BaseFx/1000BaseSx or Lx

• Ethernet 2x100BaseFx + 1x100BaseFx/1000BaseSx or Lx

7.6.6 PSU (Power Supply Unit)

Different units process the DC battery or AC (1RU version only) input in order to supply theequipment with the required supply voltages. The unit for the 2RU and 4RU versions can beduplicated for higher reliability.


CM.89012.I

ADM–1 – MN.00114.E – 004 57

Fig. 7.10 ADM–1 4RU version general block diagram (1+0 unprotected configuration)

Agg

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232

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t/s


CM.89012.I

ADM–1 – MN.00114.E – 00458


Agg

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map

ping

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up to

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bit/s

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232

supe

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ion

port

s

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s

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st

ST

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0

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bat

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bat

t.

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rix

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5 M

bit/s

trib

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yin

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TIU

64 k

bit/s

V11

serv

ice

chan

nel


CM.89012.I

ADM–1 – MN.00114.E – 004 59


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map

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up to

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r 48

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0/24

0 V

ac


CM.89012.I

ADM–1 – MN.00114.E – 00460

Fig. 7.13 ADM–1, 4RU version, equipment full protection (63x2 Mbit/s version)

2 M

bit/s

PP

I&

G.7

03pr

oc.

SM

U–M

E1 E2

2 M

bit/s

PP

I&

G.7

03pr

oc.

SM

U–R

E1

E2

LIU

–M

LIU

–R

up to

63x

2M

bit/s

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ion

up to

63x

2M

bit/s

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ion

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bit

/s in

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t BIN

TIU

ST

M1/

ST

M4

links


CM.89012.I

ADM–1 – MN.00114.E – 004 61

7.7 UNIT DESCRIPTION

Herebelow the block diagram of the units the equipment consists of are supplied. The signal pathfrom the STM–1 aggregate lines to the tributary lines and viceversa is indicated.

7.7.1 LIU (Line Interface Unit)

Refer to block diagram of Fig. 7.33.

The line STM–1 interfacing is performed through a synchronous physical interface (SPI) circuit.

Electrical version

At the receive side (West or East) the SPI interfaces the STM–1 signal then performing:

• clock extraction from CMI decoding

• code conversion from CMI to NRZ format

• input cable loss compensation up to 13 dB

The hybrid that follows supplies the two SMU units in case of SMU unit duplication.

At the transmit side it receives 155520 kbit/s signal and performs the code conversion fromNRZ to CMI format according to G.703 Recommendation.

The LIU is provided with a switch, controlled by the controller unit, for selection of the signalcoming from the two SMU units.

Optical version

It interfaces the fibre cables through optical transmitter and receiver.

At the receive side a PIN diode extracts the data at 155520 kbit/s rate in NRZ format. Thecircuits that follow are the same of electrical version.

At the transmit side the data at 155520 kbit/s rate in NRZ format is passed for modulation tothe optical transmitter.

The card uses a pluggable laser module that can be changed without extracting the card. Thecontroller card detects if a laser module is changed and updates the system. The types ofsupported laser module are listed in Tab. 6.1.

Fig. 7.14

W E

LOS LED WEST SIDE

OUT IN OUT INLOS LED

EAST SIDE

LOS LED: when ON a loss of incoming signal is detected


CM.89012.I

ADM–1 – MN.00114.E – 00462

Fig. 7.15

ON

LASERMODULES

LOSON

LOS

TX LEDACTIVE

LOS LEDWEST SIDE

TX LEDACTIVE

LOS LEDEAST SIDE

LOS LED: when ON a loss of incoming signal is detectedTX LED ACTIVE: when ON the Tx laser is active

W E

7.7.2 SMU (SDH Multiplexing Unit)

The SMU unit consists of the blocks shown by the block diagram of Fig. 7.34.It performs themultiplexing structure from STM–1 to tributary and viceversa.

A brief overview of the main functions will follow.

Fig. 7.34 shows the SMU unit in drop/insert configuration.

Fig. 7.16

ACT

TX LEDACTIVE

LED CARDFAIL

SYNC 2 MHz OUTSYNC 2 MHz IN

2 M

LED CARD FAIL: when ON the card has a major alarmLED ACTIVE STATUS: when ON the card is active

MST + RST

At the receive side an aligner circuit searches from the incoming signal the bytes A1 and A2for alignment. If the correct alignment is achieved, then a frame aligned timing circuit permitsto extract all the RST and MST bytes of the SOH. After descrambling the content of some byteis then sent to main controller for processing and for displaying by the SCT program whenconnected. At the output of MST+RST block, the Administrative Unit (AU) is passed to the MSAsection passing through a switch for signal selection from West (East) lines.

At the transmit side the AU payload from the MSA section is added with MST and RST bytesthus generating the STM–1 signal.


CM.89012.I

ADM–1 – MN.00114.E – 004 63

The byte allocation is made by using a frame timing derived from a local clock locked to theSETS. SOH content is shown in Fig. 7.45.

The STM–1 signal, after duplication, is then sent to the West (East) lines passing through theLIUs.

MSA (Multiplex Section Adaptation)

At the receive side this section extracts VC4 from AU4 and viceversa at the transmit sideterminating/inserting the AU pointers.

The pointers permit a flexible allocation to VC–4 within AU–4 regarding possiblephase/frequency fluctuation of the payload with respect to transport module (see Fig. 7.47). Thepointer occupies the STM–1 nine first bytes of the fourth row.

Pointer value permits always to locate the VC–4 start (byte J1 of POH) and recovery possiblephase/frequency variation between AU–4 and VC–4.

Positive stuffing is made if VC–4 bit rate is lower than AU4; negative stuffing if on the contrary(see Fig. 7.48).

In the first case the first three bytes following the pointer are used; in the second the last threepointer bytes are dedicated to the negative justification.

Stuffing operation is followed by pointer value updating (incremented or decremented) throughinversion of some bytes of pointer word.

HPT (High Path Termination)

This section terminates/inserts the VC4 POH thus extracting C4/generating VC4.

The POH acts as path trace identifier, error monitor, payload identifier and remote alarmindicator.

See Fig. 7.49 for VC4 POH content.

HPA (High Path Adaptation)

This section performs the following:

• mapping/demapping from C4 to TU12 and viceversa passing through TUG–2 TUG–3structure as shown in Fig. 7.50 and Fig. 7.51.

• alignment of TU12 WEST/EAST sides in the same temporal position

• permits adaptation of any VC12 embedded into the STM–1 from one side to the otherthrough TU–12 pointer mechanism (see Fig. 7.52).


CM.89012.I

ADM–1 – MN.00114.E – 00464

LPC (Lower Order Path Connection)

It permits the VC12s within STM–1 East/West to be:

• cross connected from one side to the other in any position of STM–1

• locally terminated at any tributary interface.

LPT (Low Path Termination)

At the receive side it extracts the C12 container by terminating the POH while at transmit sideperforms opposite operation.

The POH acts as low path trace identifier, error monitor, payload identifier and remote alarmindicator.

Fig. 7.54 shows the POH content (byte V5).

LPA (Low Path Adaptation)

This section permits to map (demap) an asynchronous 2048 kbit/s into (from) the C12 container.

Justification bits are included in order to perform adaptation of the external clock with the internalone.

The generated frame consists of 140 bytes with a period of 500 µs as shown in Fig. 7.53.

PPI (Plesiochronius Physical Interface)

It interfaces the 2 Mbit/s input/output signal adapting the HDB3 line code with the NRZequipment code and viceversa.

SETS

The synchronisation equipment timing source circuit supplies the reference for timing theequipment circuitry.

Fig. 7.36 shows the synchronisation block diagram.


CM.89012.I

ADM–1 – MN.00114.E – 004 65

7.7.3 2 Mbit/s (E1) tributary interface unit

This unit can interface up to sixteen 2 Mbit/s tributary lines. Further units can be added until themaximum capacity is reached. As shown in Fig. 7.37 it consists of a level adapter from HDB3to NRZ/TTL and viceversa.

In case of ADM–1 4RU version with SMU unit protection, an hybrid duplicates the signal attransmit side whereas a switch selects the best signal from the two SMU units.

Fig. 7.17

Tributary 2 Mbit/s 120 Ohm

Tributary 2 Mbit/s 75 Ohm

Output

Input

11

12 16 12

1116

119–12

1–4

13–16

5–8

7.7.4 155 Mbit/s (STM1) tributary interface unit

The unit interfaces two STM1 tributary lines. Further units can be added until the maximumcapacity is reached. The STM1 interface can be electrical or optical, depending on the equippedunit. Refer to block diagram of Fig. 7.35 for the following description.

SPI

Electrical version

At the receive side (A or B) the SPI interfaces the STM–1 signal then performing:

• clock extraction from CMI decoding

• code conversion from CMI to NRZ format

• input cable loss compensation up to 13 dB

At the transmit side it receives 155520 kbit/s signal and performs the code conversion fromNRZ to CMI format according to G.703 Recommendation.


CM.89012.I

ADM–1 – MN.00114.E – 00466

Optical version

It interfaces the fibre cables through optical transmitter and receiver.

At the receive side a PIN diode extracts the data at 155520 kbit/s rate in NRZ format. Thecircuits that follow are the same of electrical version.

At the transmit side the data at 155520 kbit/s rate in NRZ format is passed for modulation tothe optical transmitter.

The card uses a pluggable laser module that can be changed without extracting the card. Thecontroller card detects if a laser module is changed and updates the system. The types ofsupported laser module are listed in Tab. 6.1.

By SW programming it is possible to disable the SPI of the tributary unit, connecting the STM1signals to the SPI placed on the TSU unit.

In this case the SPI interface can be electrical or optical depending on the proper TSU.

Fig. 7.18 Frontal view

V.1

1LOS

LOS

A B

C36073

OUT

V11 service channel

Side AIN

Side BINOUT

C36074

LOS

A V.1

1

B

LOS

ON

ON

V11 service channel

Side BINOUT

Side AIN OUT

LED LOS: when ON a loss of incoming signal is detected

LED ON: when ON the Tx Laser is active

Class 1 Laser Product


CM.89012.I

ADM–1 – MN.00114.E – 004 67

MST + RST

At the receive side an aligner circuit searches from the incoming signal the bytes A1 and A2for alignment. If the correct alignment is achieved, then a frame aligned timing circuit permitsto extract all the RST and MST bytes of the SOH. After descrambling the content of some byteis then sent to main controller for processing and for displaying by the SCT program whenconnected.



The STM–1 signal is then sent to the A (B) lines passing through the SPIs.




Pointer value permits always to locate the VC–4 start (byte J1 of POH) and recovery possiblephase/frequency variation between AU–4 and VC–4.

Positive stuffing is made if VC–4 bit rate is lower than AU4; negative stuffing if on the contrary(see Fig. 7.48).





The POH acts as path trace identifier, error monitor, payload identifier and remote alarmindicator.

See Fig. 7.49 for VC4 POH content.





CM.89012.I

ADM–1 – MN.00114.E – 00468

• alignment of TU12 A/B sides in the same temporal position


Bus interface

This section interfaces the A and B signals, adapting the internal bus of the unit to thecross–connect bus inside the SMU (SMCU) unit.

V11 service channel

This section permits to map (demap) a V.11 64 kbit/s service channel into (from) the F1 bytes.

By SW programming the service channel can be connected to the A or B channel.

7.7.5 34/45 (E3/T3) tributary interface unit

The unit terminates three T3 or E3 bidirectional tributaries, at 34/45 Mbit/s. The line interfaceis at 75 Ohm, realized by 1.0/2.3 connectors. Through software programming, it is possible:

• to configure each single interface to operate at 34 Mbit/s or at 45 Mbit/s

• to assign the channel to one of the VC3s of the SDH frame. The multiplexing schemeis depicted in Fig.2.

More units can be inserted into the subrack, up to reach the maximum foreseen capacity. Onthe frontal panel, the LOS alarm points out, for each channel, the absence of the input signal.

Fig. 7.19

C36079LOS

A B C

CHANNEL 1 CHANNEL 2 CHANNEL 3

7.7.5.1 Functional Description

For the SDH transport, mapping is foreseen on the single VC3s. A block diagram of the unit isreported in Fig. 7.21; it highlights the following functional blocks:

Relay

It implements all the switching functions between the tributary unit and the Switch unit.

LIU

LIU contains all the circuits that interface the three E3 and/or T3 lines. In transmission, itgenerates the signal at 34.368 or at 44.736 Mbit/s to send to the line. An internal monitoringcircuit provides to raise an alarm in case of transmission fault.


CM.89012.I

ADM–1 – MN.00114.E – 004 69

In reception, it regenerates the clock and the data of the HDB3 or B3ZS signal in input. An

embedded AGC circuit allows getting an attenuation equal to 6dB and 12 db �� . An internalmonitoring circuit provides to raise an alarm in case of LOS or errors on the input signal.

Mapper

The device maps the three E3/T3 circuits into the TUG3 of the SDH frame. The three interfacescan be of uniform (E3/T3) or mixed type.

This block adapts the E3/T3 user traffic to the transport in the synchronous network, providinga justifying process in the correspondent VC3s.

Bus Interface

It allows adapting the frame format to that foreseen by the SMU unit.

Microprocessor Interface

All the functions of unit management and configuration are charged to this block.

Fig. 7.20 Multiplexing structure

VC–3

VC–12

C–3

C–12

TU–3

TU–12

VC–4AU–4

TUG–3

TUG–2

AUG

34368 Kbit/s : E3

44736 Kbit/s : T3

2048 Kbit/s : E1

STM–N

Pointer processing

Multiplexing

Aligning

Mapping

Container (C)Virtual Container (VC)Tributary Unit (TU)

Tributary Unit Group (TUG)Administrative Unit (AU)Administrative Unit Group (AUG)


CM.89012.I

ADM–1 – MN.00114.E – 00470

Fig. 7.21 E3–T3 unit block diagram

To SMU MMapper+

PLL

BusInterfaceTras

Tras

TrasLIU+

TX ClockExtractor

Relè

Relè

Relè

MicroprocessorInterface

To TSU

XO

3 x E3/T3G703

75ohm

InputOutput

InterfacesTo SMU R

To MCU

7.7.6 Ethernet tributary unit interface

This unit terminates three Ethernet tributaries, which, depending on the equipped unit, can beof type:

• 2x10/100BaseT + 1x100 Base FX or 1000 Base SX/LX 2 (Fig. 7.22)

• 2x100BaseFX + 1x100 Base FX or 1000 Base SX/LX 2 (Fig. 7.23)More units can be inserted into the subrack, up to the reaching of the maximum foreseencapacity.

In case of optical equipping, the LEDs or the lasers are of Class1.

The functionality is typical of a transparent bridge, operating at level 2 (link layer) of the OSIstandard with:

• Management of the QoS (Quality of Service) at level 2 with consequent proprietarymanagement of the queues

• Flow control

• Access to the carrier through examination of the physical address (MAC)

• VLAN (Virtual LAN), where different LANs can share the carrier maintaining areciprocal independence

• Management of the Spanning Tree protocol, which allows routing the packets withinthe SDH ring, avoiding spurious network loops.

The unit can accept Ethernet frames with standard length (up to 1536 bytes). As regards theSDH transport, the embedding into the GFP–F frame is foreseen, with the possibility to multiplex

2. The 100 or 1000 operation is achieved programming the unit for the wished modalityand equipping the same unit with the proper optical transceiver (100FX or 1000SX orLX)


CM.89012.I

ADM–1 – MN.00114.E – 004 71

the traffic on one or more concatenated VC12s and/or VC3s. Up to three virtual concatenationsare foreseen, is such a way to create independent paths within the network. A differentconcatenation can be associated to each port with variable transport capacity, with a maximumthroughput on WAN side (internal) of 290,304 Mbit/s per unit.The distribution of the traffic over the different VCs can be configured by the user via SWprogramming.

Fig. 7.22 2x10/100BaseT + 1x100BaseFx or 1000BaseSx/Lx unit

C36068

OUT IN

DPLX

Link/ACT100/1000Bx 10/100BaseT 10/100BaseT

Ch 1 Ch 2 Ch 3

Fig. 7.23 2x100BaseFx + 1x100BaseFx or 1000BaseSx/Lx unit

C36069

OUT IN OUT INOUT IN

DPLX

Link/ACT100/1000Bx 100BASEFX 100BASEFX

Ch 1 Ch 2 Ch 3

Functional description

The development foresees the treatment at level 2, “transparent bridge” type, of the packettraffic.

The three Ethernet access interfaces are connected to an internal switch of level 2 that providesto send the traffic in the different directions depending on the MAC Address.

The Ethernet packet, before being sent to the wished VCs, is embedded into a GFP–F frame.

For the SDH transport, the mapping is foreseen on the single VC12s and VC3s, or onconcatenated VCs, with the possibility to create up to a maximum of 3 concatenations per unit.

A block diagram of the unit is reported in Fig. 7.24; it highlights the following functional mainblocks:

Electrical Interface

The electrical interface is in compliance with 802.3 standard and foresees, depending on therealization, two or three RJ45 connectors on the front panel.


CM.89012.I

ADM–1 – MN.00114.E – 00472

Optical Interface

The optical interface is achieved equipping the proper unit with a LED or laser transceiver, ofpluggable type, with a LC type connector. The equipment controller provides to the user theinformation about the presence/absence/type of the transceiver.

Relay

It implements all the switching features between the tributary unit and the Switch unit.

Level 2 Switch

The switch realizes all the switching functions at level 2 between the 10/100 and 1000 Mbpsinput ports, the three internal ones and that devoted to the switch with the CPU of the BPDUsignal relevant to the Spanning Tree (RapidSTP).The switch supports the following standards:

• IEEE 802.3 relevant to LAN interfaces

• IEEE 802.1Q relevant to VLAN tagging, up to a maximum of 4096 local VLANs

• IEEE 802.1p for the priority management

• IEEE 802.3x for the flow controlIt can recognize up to 4096 different MAC Addresses, manages 4096 VLANs and provides theHW support to the CPU for the management of the Spanning Tree protocol.

The Quality of Service (QoS) is managed both at level 2 and at level 3, addressing the incomingpackets on four queues per port. The packets are queued on the chosen queue analyzing the3 bits foreseen by the Ethernet tag IEEE 802.1, or observing the bits contained in theType–of–Service field of the IP header.

MII/GMII interface and GFP frame

The module adapts the MII interface of the switch to the internal interface; the packet traffic,before being loaded on the relevant VCs, is embedded according to the GFP–F standard, whichsupports the multilink transport.

VC3 or VC12 Ethernet mapper

The module maps the traffic over the single VC12s or VC3s or concatenated VCs. Up to threevirtual concatenations are foreseen, is such a way to create independent paths within thenetwork. A different concatenation can be associated to each port with variable transportcapacity, with a maximum throughput on WAN side (internal) of 290,304 Mbit/s per unit.

Bus Interface

It allows adapting the frame format to that foreseen by the SMU unit.

Micro Interface

All the functions of unit management and configuration are charged to this block.


CM.89012.I

ADM–1 – MN.00114.E – 004 73

Microprocessor

All the functions of dynamic management of the Spanning Tree are charged to this block. It isprovided with a Dual Port Ram for the interconnection towards the central Micro.

RAM

Memory suitable to recover the delay among the different VCs of the same concatenation andallow the reconstruction of the original sequence of the Ethernet packets.

Fig. 7.24 Figure Block diagram of the 2x10/100BaseT + 1x100/1000 BaseFX Ethernettributary unit

To SMU–MMII/GMIIinterfaceandGFPFramer

BusInterface

ElectricalInterface

To MCU

RAMFLASH

VC3 orVC12

Ethernetmapper

RAM

OpticalTransceiver

100 FX or1000 SX/LX

100B T

To SMU–N

Dual PortRam

ElectricalInterface

MicroprocessorInterface

100B T

Relè

Layer 2SWITCH

To TSU

µProcessor

7.7.7 MCU (Main Controller Unit)

This unit mainly consists of a main controller type MPC860 (see Fig. 7.38) that interacts withthe equipment boards and management ports.

The activities executed by the main controller are the following:

• Communication management: it makes use of SNMP as management protocol andIP or IP over OSI as communication protocol stacks. See Fig. 7.39 for details.The interface ports for the equipment management are the following:

– LAN Ethernet 10BaseT or AUI or 10Base2 (located in Ethernet card)


CM.89012.I

ADM–1 – MN.00114.E – 00474

– RS232 asynchronous used for SCT/LCT connection

– RS232 asynchronous used for connection to remote NEs

– DCC (data communication channel) embedded within STM–1 for connection tothe remote NEs.

• Log–in: the main controller manages the equipment or network login/logout by settingand then controlling the user’s ID and relevant password.

• Database (MIB): validation and storing in a non–volatile memory of the equipmentconfiguration parameters.

• Equipment configuration: distribution of the parameters stored in the MIB towards thecontrolled units for their attuation in addition to the controls from user not stored in theMIB (i.e. loops, manual forcing etc...)

• Alarm monitoring: acquisition, filtering and correlation of the alarms gathered from thecontrolled units. Local logger and alarm sending to the connected managers: SCT/LCT– NMS5UX. Management of the alarm signalling on the basic shelf front panel.

• Performances: PM management as per Recc. G.826 performed processing:

– byte B1 related to RST of STM–1 E/W

– byte B2/M1 related to MST of STM–1 E/W

• BIP2 of V5 related to VC12

• Download: the main controller is equipped with two flash memory banks containing therunning program (active bank) and the stand–by program (inactive bank). This permitsto download a new software release to the inactive bank without disturbing the traffic.Bank switch enables the new release to be used. Download activity is based on FTPprotocol which downloads application programs, FPGA configuration, configurationfiles on main controller inactive bank or directly on the peripheral controllers.


CM.89012.I

ADM–1 – MN.00114.E – 004 75

Fig. 7.25

RAB

EOW

M L ALS

m W TEST RS232 SCT USER I/O – V11

Resetcontroller

Warningalarm

led Activetest led

Minoralarm

led

Majoralarm

led Criticalalarm

led

Automaticlaser

shutdowndisable led

RemoteRS232

ManagementRS232

Alarm I/O andService channel

LED MAJOR ALARM: when ON a major alarm is detected in the equipment (see SCT for detail)LED MINOR ALARM: when ON a minor alarm is detected in the equipment (see SCT for detail)LED CRITICAL ALARM: when ON a critical alarm is detected in the equipment (see SCT for detail)LED ALS: when ON automatic laser shutdown is disable. Therefore Tx laser is always ON: pay attention.LED TEST: when ON a manual test operation is active.

7.7.8 Power supply unit

This unit feeds all the system units. Four different PSU units are available to satisfy the powerrequirements of each ADM–1 mechanical version as shown in the table below.

Tab. 7.1

ADM–1 mechanicallayout

Input voltage range Power consumption

Figure

4RU –48/60 Vdc 50 W Fig. 7.26

2RU –48/60 Vdc 30 W Fig. 7.27

1RU –24 Vdc–48/60 Vdc

90 to 254 Vac

20 W Fig. 7.27Fig. 7.27Fig. 7.28


CM.89012.I

ADM–1 – MN.00114.E – 00476

Fig. 7.26

Powerconnector

Switch Led ON

–+

Fig. 7.27

Powerconnector

Switch Led ON

–+

Fig. 7.28

Main inputconnector

Switch Led ON

L N

L N

7.7.9 Management Interface Unit (MIU)

This unit supplies the physical Ethernet connection for management. The user can select fromthree types of physical connections: 10BaseT, 10BaseT–hub, AUI.

The MAC layer is performed by controller card.


CM.89012.I

ADM–1 – MN.00114.E – 004 77

Fig. 7.29

10BaseT unit

10BaseT–hub

AUI unit

7.7.10 SMCU

The SMCU unit consists of two main block:

• SDH block (see Fig. 7.32)

• Controller block (see Fig. 7.31)

7.7.10.1 SDH Block

It performs the multiplexing structure from STM–1 to tributary and vice versa.

A brief overview of this block will follow.

MST + RST

At the receive side an aligner searches from the incoming signal the bytes A1 and A2 foralignment. If the correct alignment is achieved, then a frame aligned timing circuit permits toextract all the RST and MST bytes of the SOH. After descrambling the content of some byteis then sent to main controller for processing and for displaying by the SCT program whenconnected. At the output of MST + RST block, the Administrative Unit (AU) is passed to the MSAsection passing through a switch for signal selection from West (east) lines.



The STM–1 signal, after duplication, is then sent to the West (East) lines passing through theLIUs.





CM.89012.I

ADM–1 – MN.00114.E – 00478

Pointer value permits always to locale the VC–4 start (byte J1 of POH) and recovery possiblephase/frequency variation between AU–4 and VC–4. Positive stuffing is made if VC–4 bit rateis lower than AU4; negative stuffing if on the contrary (see Fig. 7.48)





The POH acts as path trace identifier, error monitor, payload identifier and remote alarmindicator. See Fig. 7.49 for VC4 POH content.




• alignment of TU12 WEST/East sides in the same temporal position


LPC (Lower Order Path Connection)

It permits the VC12s within STM–1 East/West to be:

• cross connected from one side to the other in any position of STM–1

• locally terminated at any tributary interface.

LPT (Low Path Termination)

At the receive side it extracts the C12 container by terminating the POH while at transmit sideperforms opposite operation.

The POH acts as low path trace identifier, error monitor, payload identifier and remote alarmindicator. Fig. 7.54 shows the POH content (byte V5).

LPA (Low Path Adaptation)

This section permits to map (demap) an asynchronous 2048 kbit/s into (from) the C12 container.

Justification bits are included in order to perform adaptation of the external clock with the internalone.

The generated frame consists of 140 bytes with a period of 500 µs as shown in Fig. 7.53.


CM.89012.I

ADM–1 – MN.00114.E – 004 79

PPI (Plesiochronius Physical Interface)

It interfaces the 2 Mbit/s input/output signal adapting the HDB3 line code with the NRZequipment code and viceversa.

SETS

The synchronisation equipment timing source circuit supplies the reference for timing theequipment circuitry.

7.7.10.2 Controller Block

This unit mainly consists of a main controller type MPC860 that interacts with the equipmentboards and management ports.

The activities executed by the main controller are the following:

• Communication management: it makes use of SNMP as management protocol andIP or IP over OSI as communication protocol stacks. See Fig. 7.39 for details.The interface ports for the equipment management are the following:

– LAN Ethernet 10BaseT or 10Base2

– RS232 asynchronous used for SCT/LCT connection

– RS232 asynchronous used for connection to remote NEs

– DCC (data communication channel) embedded within STM–1 for connection tothe remote NEs.

• Log–in: the main controller manages the equipment or network login/logout by settingand then controlling the user’s ID and relevant password.

• Database (MIB): validation and storing in a non–volatile memory of the equipmentconfiguration parameters.

• Equipment configuration: distribution of the parameters stored in the MIB towards thecontrolled units for their attuation in addition to the controls from user not stored in theMIB (i.e. loops, manual forcing etc...)

• Alarm monitoring: acquisition, filtering and correlation of the alarms gathered from thecontrolled units. Local logger and alarm sending to the connected managers: SCT/LCT– NMS5UX. Management of the alarm signalling on the basic shelf front panel.

• Performances: PM management as per Recc. G.826 performed processing:

– byte B1 related to RST of STM–1 E/W

– byte B2/M1 related to MST of STM–1 E/W

• BIP2 of V5 related to VC12

• Download: the main controller is equipped with two flash memory banks containing therunning program (active bank) and the stand–by program (inactive bank). This permitsto download a new software release to the inactive bank without disturbing the traffic.Bank switch enables the new release to be used. Download activity is based on FTPprotocol which downloads application programs, FPGA configuration, configurationfiles on main controller inactive bank or directly on the peripheral controllers.


CM.89012.I

ADM–1 – MN.00114.E – 00480

Fig. 7.30

R

M L ALS

m W TEST RS232 SCT USER I/O – V11

Resetcontroller

EthernetWarningalarm

led Activetest led

Minoralarm

led

Majoralarm

led Criticalalarm

led

Automaticlaser

shutdowndisable led

RemoteRS232

ManagementRS232

Alarm I/O andService channel

LED MAJOR ALARM: when ON a major alarm is detected in the equipment (see SCT for detail)LED MINOR ALARM: when ON a minor alarm is detected in the equipment (see SCT for detail)LED CRITICAL ALARM: when ON a critical alarm is detected in the equipment (see SCT for detail)LED ALS: when ON automatic laser shutdown is disable. Therefore Tx laser is always ON: pay attention.LED TEST: when ON a manual test operation is active.

Sync 2 MHz IN

Sync 2 MHz OUT

SDH BLOCK

Fig. 7.31 SMCU unit – Controller block diagram

MPC860

RS232 SCT USERIN

ALARMOUTLAN

TRIBUTARY BOARDS

CONTROLLER BLOCK

DCC

DCC

AlarmLeds

East/Westfrom SDH

block

SMCU


CM.89012.I

ADM–1 – MN.00114.E – 004 81

Fig. 7.32 SMCU unit – SDH block diagram

VC

12C

ross

Con

nect

Mat

rix

AU

PT

Rpr

oc.

VC

4P

OH

term

.

TU

12P

TR

proc

.

AU

PT

Rin

sert

VC

4P

OH

inse

rt

TU

12P

TR

inse

rt

TU

12P

TR

inse

rt

VC

4P

OH

inse

rt

AU

PT

Rin

sert

SO

Hin

sert

TU

12P

TR

proc

.

VC

4P

OH

term

.

AU

PT

Rpr

oc.

VC

12P

OH

inse

rt

C12

map

.

Dec

od.

ck extr.

si/p

o

VC

12P

OH

term

.

C12

dem

apG

.703

gene

r

LP

CH

PAH

PT

MS

AM

ST

+RS

TH

PAH

PT

MS

A

HP

TH

PAH

PAH

PT

MS

A

PP

IL

PAL

PT

LP

TL

PAP

PI

2 M

bit/s

2 M

bit/s

to L

IUE

ast

VC4

C4

VC12

VC4

C4

VC12 VC12

C12

VC12

C12

VC12VC12

C4 C4

VC4 VC4

SE

TS

T0

T4

exte

rnal

timin

g

3232

MS

A

SO

Hte

rm.

MS

T+R

ST

from LIU

Eas

t

SO

Hin

sert

MS

T+R

ST

from LIU

Wes

t

SO

Hte

rm.

MS

T+R

ST

to

LIU

Wes

t


CM.89012.I

ADM–1 – MN.00114.E – 00482

7.8 EQUIPMENT FACILITIES

7.8.1 Loopbacks

Various types of loopsbacks may be implemented for test and maintenance purpose. They areenabled via software. The loopbacks have to be timed to avoid possible traffic loss. What isshown herebelow is a list of the available loopbacks:

• aggregate interface loopbacks

– local loopback

As shown in Fig. 7.41 STM–1 signal from East/West transmit side of theaggregate interface, LIU is routed back to the receive side towards the oppositedirection or towards the terminations ports, depending on the presetting made inthe cross–connect section.

– remote loopback

As shown in Fig. 7.42 STM–1 signal inputting the receive side of the East/Westaggregate interface is routed back to the transmit side of the same direction.

• VC12 loopback

As shown in Fig. 7.43 it is possible to loopback any VC12 embedded within the STM–1payload by passing through the cross–connect section. This latter permits to any VC12to be cross–connected towards the same direction, East or West. Same applies for theVC12 from/to the tributary interface.

Warning: this kind of loop cannot be timed.

• tributary interface loopbacks

– local loopback

As shown in Fig. 7.44 after receiving the loopback control, the trib. signal,connected at the transmit side, is routed back to the receive side.

– remote loopback

As shown in Fig. 7.44 the trib. signal from the cross–connect is routed backtowards the STM–1 aggregate signal, East or West or both depending on thecross–connect setting.


CM.89012.I

ADM–1 – MN.00114.E – 004 83

7.8.2 Alarm indication

All the alarm roots from the different circuits the ADM–1 consists of, are processed by the maincontroller and classified according to a severity degree settable by the user.

Alarm classification is the following:

• Critical or major: corresponding to an urgent alarm. Situation jeopardizing trafficcontinuity.

• Minor: corresponding to non urgent alarm: Situation showing a possible trafficdegradation not jeopardizing the traffic continuity.

• Warning: situation showing an external alarm that jeopardizes traffic continuity butcaused by an external failure.

Alarm severity is:

• displayed by the corresponding LED on the shelf front as shown in Fig. 7.40.

• displayed by the managers connected to supervision ports.

In addition the software program shows the individual alarm root and relevant description.

See “Unit Description” for the meaning of LEDs.

7.8.3 User in/Alarm out

Internal alarms can be routed to four available relay contacts for sending outside an alarmcondition classified as severity degree. This is implemented via software.

The external alarms can be reached by four input in I/O connectors.

See controller card for connector position and Tab. 9.6 for pin connection.

7.9 EQUIPMENT SYNCHRONISATION

Operating mode

There are three operating modes as specified by Reccs G.810/G.812/G.813 and ETS 300417–6–1:

• Locked: normal operating condition in which the local clock frequency is slaved to anexternal input reference source.


CM.89012.I

ADM–1 – MN.00114.E – 00484

• Hold–over: condition of the local clock which has lost the reference source input andis using the stored data, acquired while in locked condition, for a time greater than 15minutes. The stored data are used to reproduce the locked condition within a specifictolerance.

• Free–running: operating condition of the local clock which has lost the referencesource and has no access to the stored data acquired from the input reference source.Free–running ends when a reference source reverts to available synchronisationsource.

Synchronisation sources

As shown in Fig. 7.36 the local clock has to be locked to the following external sources:

• STM–1 from West side

• STM–1 from East side

• one 2 Mbit/s signal applied to the 63 possible inputs

• 2 MHz

• STM–1 from tributary unit

Selectors A and B select one of the four possible synchronisation sources to generate theequipment clock T0 and the external 2 MHz synchr. output T4.

Selection is made by processing the source conditions through the main controller.

Source hierarchy

The available sources are classified depending on the priority and the quality levels assigned.

• Priority level

A priority can be assigned to each individual source from the highest (priority number= 0) to the lowest (priority number 7 – source disabled)

• Quality level

A synchronisation status messages (SSM) (embedded into bit 5 to bit8 of byte S1inside the SOH) is used to determine the quality level of the source.

Tab. 7.2 shows the quality level and relevant meaning. The lowest quality level number(excluding level “0”) corresponds to the highest quality.

Tab. 7.2 Synchronisation source quality level

Quality level Abbreviation Meaning

0 – Quality unknown

2 PRC Primary reference clock

4 SSUT Synchronisation supply unit transit

8 SSUL Synchronisation supply unit local

11 SEC SDH equipment clock

15 DNU Do not use


CM.89012.I

ADM–1 – MN.00114.E – 004 85

Quality level of 2 Mbit/s and 2 MHz input sources must be assigned by the user; otherwise level11 (SEC) will be set as default.

Quality level carried by SOH within STM–1, East/West sides, can be changed by the user ifrequired.

Automatic switch condition

The synchronisation source is selected under the following conditions:

• No manual forcing is active

• The quality level has priority with respect to the priority level

• Source with highest quality level is selected. If same quality level has been assignedto the available sources then synchronisation source with the highest priority isselected.

Automatic switching mode

If the best selected source fails, then the best of remaining sources will be selected for use.

The changeover happens after the expiration of the hold off time (settable from 300 to 1880msec).

During this time the system is clocked in holdover mode assuring a frequency accuracy betterthan 0.05 ppm.

If the lost best source has been recovered reversion occurs after a WTR (Wait to restore) timesettable from 0 to 12 minutes.

If only one source is available for synchronisation and this one fails the following happens:

• Synchronous source fails after 15 minute trail: estimation of the input frequencyenables the hold–over operation mode. A frequency drift lower than ±0.05 ppm isassured for the first 15 minutes plus ±0.01 ppm per day increment plus max ±2 ppmfor temperature variation.

• Synchronous source fails before 15 minute trail: system is switched to free runningmode using the internal source assuring an accuracy of ±4.6 ppm.

Manual forcing

It si possible to enable any available source in the following manual mode:

• Manual switch: if the quality level is disabled or the available sources have the samequality then a source can be selected as preferential with respect to the others.If this source fails, automatically the source with the highest priority will be selected.

• Forced switch: a source can be selected for use regardless the quality/priority levelsassigned to the others.In case of the source fails there is no switch to another available source. The system works in holdover mode.


CM.89012.I

ADM–1 – MN.00114.E – 00486

Fig. 7.33 LIU block diagram

Opt

.

Ele

ct.

Opt

.

Ele

ct.

Opt

.

Ele

ct.

Opt

.

Ele

ct.

toS

MU

sto

SM

Us

from

SM

Us

from

SM

Us

Wes

t

Wes

t

Eas

t

Eas

t

SP

I

SP

I

SP

I

SP

I

from

con

trol

ler

unit


CM.89012.I

ADM–1 – MN.00114.E – 004 87

Fig. 7.34 SMU unit block diagram

VC

12C

ross

Con

nect

Mat

rix

AU

PT

Rpr

oc.

VC

4P

OH

term

.

TU

12P

TR

proc

.

AU

PT

Rin

sert

VC

4P

OH

inse

rt

TU

12P

TR

inse

rt

TU

12P

TR

inse

rt

VC

4P

OH

inse

rt

AU

PT

Rin

sert

SO

Hin

sert

TU

12P

TR

proc

.

VC

4P

OH

term

.

AU

PT

Rpr

oc.

VC

12P

OH

inse

rt

C12

map

.

Dec

od.

ck extr.

si/p

o

VC

12P

OH

term

.

C12

dem

apG

.703

gene

r

LP

CH

PAH

PT

MS

A

MS

T+R

ST

HPA

HP

TM

SA

HP

TH

PAH

PAH

PT

MS

A

PP

IL

PAL

PT

LP

TL

PAP

PI

2 M

bit/s

2 M

bit/s

to L

IUs

Eas

t

VC4

C4

VC12

VC4

C4

VC12 VC12

C12

VC12

C12

VC12VC12

C4 C4

VC4 VC4

SE

TS

T0

T4

exte

rnal

timin

g

6363

MS

A

SO

Hin

sert

MS

T+R

ST

SO

Hte

rm.

MS

T+R

ST

from

LIU

sE

ast

SO

Hte

rm.

MS

T+R

ST

MS

P

MS

P

SO

Hin

sert

MS

T+R

ST

from

LIU

sW

est

SO

Hin

sert

MS

T+R

ST

SO

Hte

rm.

MS

T+R

ST

to

LIU

sW

est

SO

Hte

rm.

MS

T+R

ST

MS

P


CM.89012.I

ADM–1 – MN.00114.E – 00488

Fig. 7.35 STM–1 tributary unit – block diagram

Bus

inte

rfac

e

AU

PT

Rpr

oc.

VC

4P

OH

term

.

TU

12P

TR

proc

.

AU

PT

Rin

sert

VC

4P

OH

inse

rt

TU

12P

TR

inse

rt

TU

12P

TR

inse

rt

VC

4P

OH

inse

rt

AU

PT

Rin

sert

SO

Hin

sert

TU

12P

TR

proc

.

VC

4P

OH

term

.

AU

PT

Rpr

oc.

V.1

1in

t.

LP

CH

PAH

PT

MS

A

MS

T+R

ST

HPA

HP

TM

SA

HP

TH

PAH

PAH

PT

MS

A

from

/to S

MU

(S

MC

U)

Ch

A

V.1

1 –

64 k

bit/s

serv

ice

chan

nel

to T

SU

ChB

VC4

C4

VC12

VC4

C4

VC12

VC12VC12

C4 C4

VC4 VC4

MS

A

SO

Hin

sert

MS

T+R

ST

SO

Hte

rm.

MS

T+R

ST

SO

Hte

rm.

MS

T+R

ST

MS

P

MS

P

SO

Hin

sert

MS

T+R

ST

from

TS

UC

h A

SO

Hin

sert

MS

T+R

ST

SO

Hte

rm.

MS

T+R

ST

SO

Hte

rm.

MS

T+R

ST

MS

P

from

TS

UC

hBChB

155

Mbi

t/s

to

TS

UC

h A

ChA

155

Mbi

t/s

from

/to S

MU

(S

MC

U)

Ch

B

Sw

itch

SP

IS

PI


CM.89012.I

ADM–1 – MN.00114.E – 004 89

Fig. 7.36 Synchronisation block diagram

SETS

Internalsource

SETG EquipmentCK

Maincontroller

G.703

SelectorA

SelectorB

2 Mbit/s

2 MHz

STM–1 West

STM–1 East

Selector drive

T3

T2

T1

T1

1

63

T0

T4externalsynch.output

priority/qualityloss of

externaltimimg

STM1–TU


CM.89012.I

ADM–1 – MN.00114.E – 00490

Fig. 7.37 2 Mbit/s interface unit block diagram

Leveladapter

Leveladapter

Up to 126x2Mbit/s

Up to 126x2Mbit/s

G.703

G.703

ToSMU–M

ToSMU–RFrom

SMU–M

FromSMU–R

Fig. 7.38 Controller architecture

MPC860

RS232 SCT USERIN

ALARMOUTLAN

Ethernet boards

ADM–1 BOARDS

CONTROLLER BOARD

DCC

DCC

AlarmLeds

East/Westfrom SMU


CM.89012.I

ADM–1 – MN.00114.E – 004 91

Fig. 7.39 IP/IPover OSI protocol stack

APPLICATION SOFTWARE

SNMP

TCP/UDP

IPIPoverOSI

IS–ISISO 10589

PPP PPPLLCMAC

LAPDQ921

LCCMAC

RS232DCC

STM–1Ethernet

LANDCC

STM–1Ethernet

LAN

Applic./present.session layers

Transportlayer

Routinglayer

Data linklayer

Physicallayer


CM.89012.I

ADM–1 – MN.00114.E – 00492

Fig. 7.40 Alarm indications in evidence

C36054

2M

1 1111

112

16

C36054

2M

1 1111

112 16

C36054

2M

1 1111

112 16

C36054

2M

1 1111

1

16

C36054

2M

1 1111

1

1616

121 11

11

1

2M

C36054

C36054

2M

1 11

11

1

16

16

1 11111

2M

C36054

–+

C36050

ON

ON

C36050

+ –

R

BA

ALSC

M mW

TE

ST

RS

232

SC

TU

SE

R I/

O &

V11

C36

058

EO

W

2MC

3605

6

AC

TA

CT

C36

056

2M

C36060

10 B

ase

T

RX

TX

C36

064

LOS

EW

LOS

LOS

WE

LOS

C36

064

LAN

Pow

er O

NLO

S (

Loss

Of S

TM

–1/4

Sig

nal)

ALS

CM m

WT

ES

T

ALA

RM

AR

EA

Crit

ical

Aut

omat

ic (

lase

r)sh

ut d

own

disa

bled

War

ning

Maj

or

Min

orM

anua

lop

erat

or

R

Res

etµ

P

activ

ity

1212

1212


CM.89012.I

ADM–1 – MN.00114.E – 004 93

Fig. 7.41 Aggregate interface local loopback

Aggregate interface Cross–connect Aggregate interface

Loopback control Loopback control

Tributary interface

STM–1East

STM–1West

Tributaryports

LIU LIU

Fig. 7.42 Aggregate interface remote loopback

Aggregate interface Cross–connect Aggregate interface

Loopback control Loopback control

Tributary interface

STM–1East

STM–1West

Tributaryports


CM.89012.I

ADM–1 – MN.00114.E – 00494

Fig. 7.43 VC12 loopback

Cross–connectAggregate interface Aggregate interface

Tributaryinterface

Loopcontrol

Loopcontrol

Loopcontrol

VC12

2 Mbit/s

VC12

VC12 STM–1East

STM–1West

Fig. 7.44 Tributary interface loopback

Cross–connect

Trib. signal

Loopback control

Cross–connect

Trib. signal

Loopback control

LOCAL REMOTE


CM.89012.I

ADM–1 – MN.00114.E – 004 95

7.10 SDH OVERVIEW

This is a brief overview of SOH structure. For details see Rec. G.707.

A1 A1 A1 A2 A2 A2 J0 X X

B1 E1 F1 X X RSOH

D1 D2 D3

AU POINTER

B2 B2 B2 K1 K2

D4 D5 D6

D4 D8 D9 MSOH

D10 D11 D12

S1 M1 E2 X X

Fig. 7.45 SOH content

RSOH key

• A1, A2 bytes used for frame alignment• J0 byte used as regenerator section path trace• B1 byte used for error control by means of BIP–8 parity code• D1, D2, D3 bytes carry the DCC (Data Communication Channel) for control and

management of regenerator sections• E1 byte is used for voice communication among operators at regenerator sections• F1 byte, 64 kbit/s data channel• X bytes, reserved for national use

• bytes forwarding the alarm criteria detected in the regenerator section upstream

• bytes not used

• bytes reserved for future international standardisation

MSOH key

• B2 bytes used for error control by means of BIP–24 parity code• K1, K2 (from bit1 to bit5): automatic switching check (not used)• K2 (from bit6 to bit8): MS remote defect indication (MS–RDI)• D4÷D12: DCCM data communication channel• E2: Engineering Order Wire• S1 (b5÷b8): synchronous status bytes• M1: Multiplex Section REI, Remote Error Indication• X: reserved for national use

• : reserved for future international standardisation


CM.89012.I

ADM–1 – MN.00114.E – 00496

Fig. 7.46 Multiplexing structure of up to 63x2 Mbit/s within the STM–1 frame

9 bytes 261 bytes

9 by

tes

STM–1

SOH

AU pointer

AU–4

VC–4(TUG–3X3)

ÏÏÏÏ

A1

B1

C1

D1

E1

F1

G1

A2

B2

C2

D2

E2

F2

G2

A3

B3

C3

D3

E3

F3

G3

Pathinformation

ÏÏÏÏÏÏ

ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ

ÏÏÏÏÏÏÏÏ

A

ÏÏÏÏÏÏÏÏÏÏÏÏ

ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ

ÏÏÏÏÏÏÏÏ

B

ÏÏÏÏÏÏ

ÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏÏ

ÏÏÏÏÏÏÏÏ

D

ÏÏÏÏÏÏ


ÏÏÏÏÏÏ

E

ÏÏÏÏÏÏÏÏÏÏÏÏ


ÏÏÏÏÏÏÏÏ

F

ÏÏÏÏÏÏ


ÏÏÏÏÏÏ

G

1 2 3

TUG–3(TUG–2X7)

TUG–2

2 31

Pointer

TU–12

VC–12C–12

Pathinformation

Fixed andjustification

bits2 Mbit/s

plesiochronous

C


CM.89012.I

ADM–1 – MN.00114.E – 004 97

Fig. 7.47 Dynamic allocation of VC–4 within AU–4

J19 rows

270 bytes

9 bytes 261 bytes

AU4 pointer

SOH Overhead section

SOH Overhead section

VC4


CM.89012.I

ADM–1 – MN.00114.E – 00498

Fig. 7.48 Pointer in action

J

J

J

J

PT (n)

PT (n)

PT (n+1)

PT (n+1)

J

J

J

J

PT (n)

PT (n)

PT (n+1)

PT (n+1)

Frame N

Frame N+1

Frame N+2

S

Negative justification Positive justification

PT(n) = Pointer with “n” valueJ = Bytes with opportunity of negative justificationS = Bytes with opportunity of positive justification (stuffing)

S

Start of VC4Start of VC4


CM.89012.I

ADM–1 – MN.00114.E – 004 99

Fig. 7.49 VC–4 POH content

J1

B3

C2

G1

F2

H4

F3

K3

N1

1 2

REI

3 4 5 6 7 8

RDI N.U.

REI = Remote Error Indication

RDI = Remote Defect Indication

N.U. = Not used

J1 = Path trace

B3 = Path error monitoring function

C2 = Signal label

G1 = Path status and performance

F2 = Not used

H4 = Multiframe position indicator

F3 = Not used

K3 = Not used

N1 = Not used

9 by

tes


CM.89012.I

ADM–1 – MN.00114.E – 004100

Fig. 7.50 Multiplexing of three TUG–3 into C–4

TUG–3(C)

TUG–3(B)

TUG–3(A)

86

1

86

1

86

1

261CBACBACBA

CBACBACBA

C–4

.

.

.

.98765432

1 column

9 rows

fixed stuffing


CM.89012.I

ADM–1 – MN.00114.E – 004 101

Fig. 7.51 TUG–2/TUG–3 multiplexing structure

TU–12

TUG–2

TUG–3

A B C

AB

CA

BC

AB

CA

BC

1 2 7

12

34 5

6 7

12

34 5

6 7

12

34 5 6 7

1 2 3 4 5 6 7 8 9 ................................. ..........86

fixedstuffing

bit


CM.89012.I

ADM–1 – MN.00114.E – 004102

Fig. 7.52 TU–12 frame and pointer position

V1

Position105

.

.

.

Position139

V2

Position0...

Position34

V3

Positon35...

Position69

V4

Position70...

Position104

TU–12

1 byte

125

µs12

5 µs

125

µs12

5 µs

500

µs

negativejustificationpossibility

positivejustificationpossibility

POINTER

V1 + V2 = pointer word

V3 = negative justification

V4 = reserved

pointer area

VC–12 area

N N N N S S I D I D D D DI I I

V1 V2

10–bit pointer value indicates theoffset from V2 to the first byte ofVC–12

N = New Data Flag Bit

I = Increment Bit

Negative Justification–Invert 5 D Bits

Positive Justification–Invert 5 I Bits

Pointer range 0 to 139

SS = TU Type (”10” for TU–12)

D = Decrement Bit


CM.89012.I

ADM–1 – MN.00114.E – 004 103

Fig. 7.53 VC–12 mapping

V5 (see Fig. 7.54 )R R R R R R R R

32 bytes

R R R R R R R RJ2

C1 C2 O O O O R R

32 bytes

R R R R R R R RN2

C1 C2 O O O O R R

32 bytes

R R R R R R R RK4

C1 C2 R R R R R S1S2 I I I I I I I

31 bytes

R R R R R R R R

500 �S

140

byt

es

J2 = Low order path access point identifier

N2 = Not used

K4 = Not used

I = Data bits

O = Overhead bits

C = Justification control bit

S1/S2 = Justification opportunity bits

R = Fixed stuff bits

= Information bytes

= Control and stuffing bytes


CM.89012.I

ADM–1 – MN.00114.E – 004104

Fig. 7.54 VC5 byte content

1 2 3 4 5 6 7 8

BIP–2 REI RFI SIGNAL LABEL RDI

Byte V5

REI CODING

0 no error

1 one or two errors

RFI CODING

0 no mulfunctioning

1 remote mulfunctioning indication

RDI CODING

0 no remote alarm

1 remote alarm indication

SIGNAL LABEL CODING

000 unequipped

010 equipped asynchronous

BIP–2 = Bit Interleaved Parity Error Checking

REI = Remote Error Indication

RFI = Remote Failure Indication

RDI = Remote Defect Indication

ADM–1 – MN.00114.E – 004 105


3Section

Installation


CM.89012.I

ADM–1 – MN.00114.E – 004106

ADM–1 – MN.00114.E – 004 107

8. EQUIPMENT INSTALLATION

8.1 GENERAL

The equipment consists of a wired subrack for 19” rack mounting.

The equipment is shipped in an appropriate cardboard box. After unpacking mechanicalinstallation takes place as well as electrical wiring.

8.2 MECHANICAL INSTALLATION

On their sides the subrack is provided with two holes for the rack mounting making use of 4 M6screws.

On right side the subrack is provided with a faston that must be connected to the protective earthwith a permanent connection (see Tab. 8.1).

8.3 ELECTRICAL WIRING

The electrical wiring must be done using appropriate cables thus assuring the equipmentresponds to the electromagnetic compatibility standards.

The cable terminates to flying connectors which have to be connected to the correspondingconnectors on the equipment front.

Position and pin–out of the equipment connectors are available in this section.

Tab. 8.1 shows the recommended cables to be used and the corresponding interconnectingconnectors.


8


CM.89012.I

ADM–1 – MN.00114.E – 004108

Tab. 8.1

Interconnecting points Type of connector termi-nating the cable

Type of cable/conductor

Battery power supply Polarised SUB–D 3W3 femaleconnector

Section of each wire ≥ 2.5sqmm and length ≤ 10 m

AC power supply DIN GST3 female connector Three wire cable with section ofeach wire ≥ 1.5 sqmm andlength ≤ 10 m

Aggregate signals synchroni-sation

1.0/2.3 male 75 ohm coaxial cable with dou-ble shield

Tributary signals 1.0/2.3 male 75 ohm coaxial cable with dou-ble shield

26 pin SUB–D male connector 120 ohm balanced eight sym-metric shielded pairs with exter-nal shield

RJ45 connector Cable CAT5

V11 service xhannel (tributarySTM1)

MINI Din circular 8 pins femaleconnector

4 twisted pairs cable with dou-ble shiled

User inputs/alarms output Female type D connector with26 pins and shielded holder

26 conductor cable with doubleshield

LCT/RS232 Female type D connector with 9pins and shielded holder

3 conductor cable with doubleshield

GND Faston male type Section area ≥ 4 sqmm.

ADM–1 – MN.00114.E – 004 109

9. USER CONNECTORS

9.1 GENERAL

User connections have to be performed using proper connectors available on the front of thefollowing units the equipment consists of.

For ADM–1 4RU version, refer to Fig. 9.1.

For ADM–1 2 RU version, refer to Fig. 9.2.

For ADM–1 1 RU version, refer to Fig. 9.3.

9.2 AVAILABLE CONNECTORS AND THEIR USE

The user connectors are:

TIU (Tributary Interface Units)

• 2 Mbit/s (E1) 75 Ohm: each unit carries up to sixteen tributaries

– I/O connectors: 1.0/2.3 female 75 Ohm type (see Fig. 9.4)

• 2 Mbit/s (E1) 120 Ohm: each unit carries up to sixteen tributaries

– I/O connectors: SUB–D26 pins male 120 Ohm type (see Fig. 9.6 and Tab. 9.1)

• 155 Mbit/s (STM1) electrical: each unit carries up to two tributaries

– I/O connectors: 1.0/2.3 female 75 Ohm type (see Fig. 9.7)

– V11service channel connector: MINI Din circular 8 pins female (see Fig. 9.7,Fig. 9.9 and Tab. 9.2)

• 155 Mbit/s (STM1) optical: each unit carries up to two tributaries


9


CM.89012.I

ADM–1 – MN.00114.E – 004110

– I/O connectors: LC type for I1, S11, L11, L12 applications (see Fig. 9.8)

– V11service channel connector: MINI Din circular 8 pins female (see Fig. 9.8,Fig. 9.9 and Tab. 9.2)

• Ethernet 2x10/100BaseT + 1x100BaseFx/1000BaseSx or Lx

– I/O connectors: RJ45 type (see Fig. 9.12, Fig. 9.11 and Tab. 9.3)

– I/O BaseFx connector: LC type (see Fig. 9.10)

• Ethernet 2x10/100BaseFx + 1x100BaseFx/1000BaseSx or Lx

– I/O BaseFx connectors: LC type (see Fig. 9.10)

• 34/45 Mbit/s (E3/T3) G703:

– I/O connector: 1.0/2.3 75 Ohm female (see Fig. 9.22).

SMU (SDH Multiplexing Unit)

– In/Out 2 MHz synchronisation source connectors: 1.0/2.3 female 75 Ohm type(see Fig. 9.5)

MCU (Main Controller Unit)

– User I/O and V11 connector: SUB–D26 pins male type (see Fig. 9.13, Fig. 9.14and Tab. 9.6)

– RS232 connector: SUB–D9 pins male type (see Fig. 9.13 and Tab. 9.4)

– SCT connector: SUB–D9 pins male type (see Fig. 9.13 and Tab. 9.5)

SMCU (SDH Multiplexing and Main Controller Unit)

– In/Out 2 MHz synchronisation source connectors: 1.0/2.3 female 75 Ohm type(see Fig. 9.15)

– User I/O and V11 connector: SUB–D26 pins male type (see Fig. 9.14, Fig. 9.15and Tab. 9.6)

– RS232 connector: SUB–D9 pins male type (see Fig. 9.15 and Tab. 9.7)

– SCT connector: SUB–D9 pins male type (see Fig. 9.15 and Tab. 9.8)

– 10BaseT management interface: RJ45 type connector (see Fig. 9.15, Fig. 9.19and Tab. 9.10)

LIU (Line Interface Unit) electrical

Each unit carries up to two In/Out STMn interfaces

– STM–1 In/Out connectors: 1.0/2.3 female 75 Ohm type (see Fig. 9.16)

LIU (Line Interface Unit) optical

Each unit carries up to two In/Out STMn interfaces

– STM–1 In/Out connectors: LC type for I1, S11, L11, L12 applications (seeFig. 9.17).


CM.89012.I

ADM–1 – MN.00114.E – 004 111

MIU (Management Interface Unit)

Three different Ethernet interfaces are available

– 10BaseT: RJ45 type connector (see Fig. 9.19 and Tab. 9.10)

– 10BaseT–hub: RJ45 type connector (see Fig. 9.10 and Fig. 9.19)

– AUI: SUB–D15 pin female type connector (see Fig. 9.18 and Tab. 9.9)

PSU (Power Supply Unit) for DC input battery

– 24 or 48/60 Vdc input: SUB–D 3W3 female type (see Fig. 9.20 and Tab. 9.11)

PSU (Power Supply Unit) for AC main input

– 110/240 Vac input: GST 3 pins male DIN type connector (see Fig. 9.21 andTab. 9.12).


CM.89012.I

ADM–1 – MN.00114.E – 004112

Fig. 9.1 ADM–1 4RU version, position of the user connectors

AC

T

LOS

LOS A

CT

WE

C36

063

C36063

E

WA

CT

LOS

AC

T

C36054

2M

1 11

11

1

12

16

C36054

2M

1 11

11112 16

C36054

2M

1 11

11

1

12

16

C36054

2M

1 11

11

1

12

16

C36054

2M

1

1111

1

12 16

1612

1

11

111

2M

C36054

C36054

2M

1 1111

1

12

161612

1 11

111

2M

C36054

–+

C36050

ON

ON

C36050

+ –

R

BAA

LSCM

mW

TE

ST

RS

232

SC

TU

SE

R I/

O &

V11

C36

058

EO

W

2MC

3605

6

AC

TA

CT

C36

056

2M

C36060

10 B

ase

T RX

TX

MIU

SM

U–R

LIU

–RLI

U–M

MC

US

MU

–M

2 M

bit/s

trib

. pos

ition

2 M

bit/s

trib

. or

35/4

5 M

bit/s

or S

TM

–1 tr

ib. p

ositi

on

TIU

–TR

IBU

TAR

Y IN

TE

RFA

CE

UN

ITS

PS

U–M

PS

U–R

–


CM.89012.I

ADM–1 – MN.00114.E – 004 113


AC

TA

CT

WE

C36063

C36063

C36

054

1

1111

112

16

R

BA

ALSC

M mW

TE

ST

RS

232S

CT

US

ER

I/O &

V11

C36058

EO

W

C36056

AC

T

C36056

2M

C36060

RX

TX

PS

U–M

PS

U–R

LIU

MC

US

MU

C36

054

1

1111

112

16C

3605

4

1

1111

112

16

2M

C36

054

1

1111

112

16

ON ON

TIU

–TR

IBU

TAR

Y IN

TE

RFA

CE

UN

ITS

MIU


CM.89012.I

ADM–1 – MN.00114.E – 004114


AC

TA

CT

WE

C36063

C36063

R

BA

ALSC

M mW

TE

ST

RS

232S

CT

US

ER

I/O &

V11

C36058

EO

W

C36056

PS

US

MC

ULI

U

TIU

–TR

IBU

TAR

Y IN

TE

RFA

CE

UN

ITS

C36

054

1

1111

112

16

C36

054

1

1111

112

16

ON


CM.89012.I

ADM–1 – MN.00114.E – 004 115

1.0/2.3 connectors for 2 Mbit/s tributary interfaces (75 Ohm)

Fig. 9.4 Front view

C36052

11

111

12 16

INPUTS

OUTPUTS

1

1216

1.0/2.3 coaxial connectors for 2 MHz synchronism

Fig. 9.5 Front view

2MC36053

ACT

IN OUT2 MHz synchronism


CM.89012.I

ADM–1 – MN.00114.E – 004116

Tab. 9.1 Connector pin–out for 2 Mbit/s tributary interfaces (120 Ohms)

Pin number Signal Trib. 1–4 Trib. 5–8 Trib. 9 –12 Trib. 13–16

1 input b–wire P1 1 5 9 13

2 output b–wire P1 1 5 9 13







9 GND cable shield

10 input a–wire N1 1 5 9 13

11 output a–wire N1 1 5 9 13

12 input a–wire N2 2 6 10 14


14 input a–wire N3 3 7 11 15


16 input a–wire N4 4 8 12 16


18 GND cable shield

19 input shield–GND 1 5 9 13

20 output shield–GND 1 5 9 13








CM.89012.I

ADM–1 – MN.00114.E – 004 117

Fig. 9.6 Front view

C36054

9 –1

21

–4

13 –

165

–8

Tributaries 1 to 4 Tributaries 5 to 8

11019

91826

Fig. 9.7 Front view

V.1

1LOS

LOS

A B

C36073

OUT IN OUT IN

V11 service channel

A side B side

Fig. 9.8 Front view

C36074

LOS

A V.1

1

B

LOS

ON

ON

OUT IN OUT IN

V11 service channel

A side B side Class 1 Laser product

Fig. 9.9 Front view

12

345

678


CM.89012.I

ADM–1 – MN.00114.E – 004118

Tab. 9.2

Pin number V11 connections

1 Ck Rx V11 (out+)

2 Ck Rx V11 (out–)

3 Tx V11 (out+)

4 Tx V11 (out–)

5 Rx V11 (in+)

6 Rx V11 (in–)

7 Ck Tx V11 (out+)

8 Ck Tx V11 (out–)

LC connector for Optical Ethernet tributary

Fig. 9.10 Front view

C36069

OUT IN OUT INOUT IN

DPLX

Link/ACT100/1000Bx 100BASEFX 100BASEFX

Class 1 Laser product

LC and RJ45 female connector for Ethernet tributary

Fig. 9.11

C36068

OUT IN

DPLX

Link/ACT100/1000Bx


10/100BaseT 10/100BaseT


CM.89012.I

ADM–1 – MN.00114.E – 004 119

Female RJ45 connector for 10/100BaseTx Ethernet tributary

Fig. 9.12 Front panel

10/100BTxPin1 Pin8

Tab. 9.3

Pin Function Notes

1 TPTx+

2 TPTx–

3 TPRx+

4 Termination network


6 TPRx–



Fig. 9.13 MCU (Main Controller Unit) connectors

EOW

C36058

USER I/O & V11SCTRS232TESTWm

M C ALSA

B

R1 56 9

1 56 9


CM.89012.I

ADM–1 – MN.00114.E – 004120

9 pin SUB–D male connector pin–out for RS232 interface and PPP protocol

Tab. 9.4

Pin number RS232 signal

1 NC

2 RX (IN)

3 TX (OUT)

4 –

5 GND

6 –

7 –

8 –

9 –

9 pin SUB–D male connector pin–out for SCT/LCT connection

Tab. 9.5

Pin number Signal

1 NC

2 RX (IN)

3 TX (OUT)

4 NC

5 GND

6 NC

7 –

8 –

9 NC


CM.89012.I

ADM–1 – MN.00114.E – 004 121

25 pin SUB–D (high density type) male connector pin–out for user I/O and V11 channelpin–out

Tab. 9.6

Pin number USER IN/OUT V11

1 Relé 1 (1st contact)




5 Relé 1 (2nd contact)




9/18/23/24/25/26 GND

10 Rx V11 (in–)

11 Rx V11 (in+)

12 CK Rx V11 (out+)

13 CK Rx V11 (out–)

14 CK Tx V11 (out+)

15 CK Tx V11 (out–)

16 Tx V11 (out+)

17 Tx V11 (out–)

19 User IN 1

20 User IN 2

21 User IN 3

22 User IN 4


1 910 18

19 26


CM.89012.I

ADM–1 – MN.00114.E – 004122

Fig. 9.15 SMCU (SDH Multiplexing and Main Controller Unit) connectors

R

ALSCM

m WTESTRS232 SCT

USER I/O & V11

C3608910 Base T

2M

OUTIN

2 MHz synchronism

61 5

951

6 9

9 pin SUB–D male connector pin–out for RS232 interface and PPP protocol

Tab. 9.7


1 NC

2 RX (IN)

3 TX (OUT)

4 –

5 GND

6 –

7 –

8 –

9 –

9 pin SUB–D male connector pin–out for SCT/LCT connection

Tab. 9.8


1 NC

2 RX (IN)

3 TX (OUT)

4 NC

5 GND

6 NC

7 –

8 –

9 NC


CM.89012.I

ADM–1 – MN.00114.E – 004 123

1.0/2.3 connectors for STM1 aggregate interfaces


C36062LOS

EWLOS

OUT INWest side

OUT INEast side

LC connectors for STM1 aggregate optical interfaces


LOS LOS

W E

C36063

ONON

OUT INWest side

OUT INEast side



CM.89012.I

ADM–1 – MN.00114.E – 004124

Female connector type SUB–D 15 pins for AUI Management interface


18915

Tab. 9.9

Pin number Signal Pin number Signal

1 GND 9 CD–

2 CD+ 10 TXD–

3 TXD+ 11 GND

4 GND 12 RXD–

5 RXD+ 13 +12V

6 GND 14 GND

7 NC 15 NC

8 GND – –

Female RJ45 connector for 10BaseT management interface

Fig. 9.19

Pin1 Pin8

Tab. 9.10

Pin number Signal

1 Transmitted data (+)

2 Transmitted data (–)

3 Received data (+)

4 Not used

5 Not used

6 Received data (–)

7 Not used

8 Not used


CM.89012.I

ADM–1 – MN.00114.E – 004 125

3W3 SUB–D female connector for DC input battery


+ –

1 2 3

Tab. 9.11 Power supply

Pin number Signal

1 +

2 GND

3 –

GST3 – DIN type male connector for AC main input


L N

Tab. 9.12

Pin description Signal

L Line

GND

N Neutral


CM.89012.I

ADM–1 – MN.00114.E – 004126

1.0/2.3 connector for 34/45 Mbit/s (E3/T3) G.703 tributary

Fig. 9.22

C36079LOS

A B C

CHANNEL 1 CHANNEL 2 CHANNEL 3

ADM–1 – MN.00114.E – 004 127


4Section

Line–up


CM.89012.I

ADM–1 – MN.00114.E – 004128

ADM–1 – MN.00114.E – 004 129

10. EQUIPMENT LINE–UP

10.1 GENERAL

Before putting the equipment into service it is advisable to perform checking mentioned herebelow.

10.2 EQUIPMENT SWITCH–ON

Connect the 24/48/60 V battery or the main line to the appropriate power supply connectors.

Push the ON/OFF switch and check that green Led “ON” lights up.

10.3 1+0 TERMINAL MULTIPLEXER EQUIPMENTFUNCTIONALITY TEST

Proceed as follows:

• Set–up the test bench of Fig. 10.1.

• Perform a physical loop between the Tx/Rx of the STM–1 West aggregate.

• Connect a pattern generator/error detector to in/out connector number 9 of tributaryunit 1 (as example).

• Connect the PC (where the SCT/LCT program has been installed) to LAN or RS232interface port.


10


CM.89012.I

ADM–1 – MN.00114.E – 004130

• Run the program

Warning: it is assumed that the SCT/LCT program is well known. Otherwise refer tothe program help on–line for details.

• Open the menu “Equipment” and then LCT interface and then Synchronisation andthen set parameters.

• Set “T0 operation control” in free running.

• Open “VC4 East/West” window and then “setting” window.Set the signal label to “TUG structure and then press “apply”. Open window “TUG3setting” and enable VC12 in any TUG3 structure.

• Select tributaries and then 2 Mbit/s slot 1 setting windows

• Close the braker of line 9 then in VC12 setting windows assign the signal label of Txand Rx as asynchronous

• Open the “cross–connect” window.

• Set–up the cross–connect matrix from VC12–3/TUG2–3/TUG3–1/STM–1 Westcross–connected to tributary 9.

• Select tributaries and then 2 Mbit/s slot 1 setting windows from LCT interface.

• Press Details... and check that VC12 number 9 does not display any alarm and thebreaker is closed on the trib. line under test as shown in Fig. 10.4.

• Perform a bit error rate measurement and check for no errors.

Fig. 10.1 1+0 terminal multiplexer bench set–up

Tributaryinterface

unit

Tributaryports

Pattern/generatorerror detector

STM–1interfaceWest side

(LIU)

Managementinterface

SCT/LCT

Tx

Rx

LAN or RS232interface port


CM.89012.I

ADM–1 – MN.00114.E – 004 131

10.4 1+1 OR DROP–INSERT MULTIPLEXER EQUIPMENTFUNCTIONALITY TEST

Proceed as follows:

• Set–up the test bench of Fig. 10.2.

• Perform a physical loop between the two STM–1 aggregates, East/West sides of theLIU. The LIU –R connections must be disconnected.

• Connect a pattern generator/error detector to in/out connector number 9 of tributaryunit 1 (as example).

• Connect the PC (where the SCT/LCT program has been installed) to LAN or RS232interface port.

• Run the program.

Warning: it is assumed that the SCT/LCT program is well known. Otherwise refer tothe program help on–line for details.

• Open the menu “Equipment” and then LCT interface and then Synchronisation andthen set parameters.

• Set “T0 operation control” in free running.

• Open “VC4 East/West” window and then “setting” window.Set the signal label to “TUG structure and then press “apply”. Open window “TUG3setting” and enable VC12 in any TUG3 structure.

• Select tributaries and then 2 Mbit/s slot 1 setting windows.

• Close the braker of line 9 then in VC12 setting windows assign the signal label of Txand Rx as asynchronous.

• Open the “cross–connect” window.

• Set–up the cross–connect matrix as shown in Fig. 10.3.Fig. 10.3 shows VC12–3/TUG2–3/TUG3–1/STM–1 West cross–connected totributary 9 as primary line while VC12–3/TUG2–3/TUG3–1/STM–1 Eastcross–connected as secondary line.The darker colour into square P indicates the line in service.

• Select tributary and then PPI setting windows from LCT interface.

• Press Details... of PPI 1–9 and check that VC12 number 9 does not display any alarmand the breaker is closed on the trib. line under test as shown in Fig. 10.4.

• Perform a bit error rate measurement and check for no errors.

• Remove cable from Rx side of STM–1, west side.

• Check the changeover from primary line to secondary line. The changeover isindicated by the change of colour density. The darker colour into square S indicatesthe line in service.

• If wished, repeat the same test by cross–connecting other VC12s and change theposition of pattern generator to another tributary line.


CM.89012.I

ADM–1 – MN.00114.E – 004132

10.5 LASER FUNCTIONALITY TEST

10.5.1 Switch–on procedure

• Connect Tx West (East) to Rx West (East) as shown in Fig. 10.5.

• Run SCT/LCT program and look for STM–1 East/West window.

• Click on STM–1 West (East) of LCT program until window of Fig. 10.6 is displayed.

• Set Automatic Shutdown to “auto” mode.

• Check that Leds “ACT” West and East are ON.

In case of opposite situation is shown, wait for expiration of “x” time present in “Auto RestartTime” box (range from 60 to 300 sec.).

Note: The laser is switched on every “x” seconds for 2 seconds thus permitting the opposite sidelaser to receive and consequently the two transmitters to be switched on.

If faster laser switch–on is required, set “automatic shut down” to “manual” mode and then press“restart” to send immediately the switch–on control.

Note: If laser power measurement is required, set “automatic shut–down” to “test” mode, presettest time from 2 to 100 sec. and then press “Restart” to activate the test.

10.5.2 Automatic laser shutdown check

• Set automatic shutdown to “auto” mode

• Remove the optical cable from Rx West (East) side the optical cable and check thatLed “ACT” goes off.


CM.89012.I

ADM–1 – MN.00114.E – 004 133

Fig. 10.2 Bench set–up

Tributaryinterface

unit

Tributaryports

Pattern/generatorerror detector

STM–1interfaceEast side

(LIU)

STM–1interfaceWest side

(LIU)

Managementinterface

SCT/LCT

Tx

Rx

Tx

Rx

LAN or RS232interface port


CM.89012.I

ADM–1 – MN.00114.E – 004134

Fig. 10.3 Cross–connect matrix set–up


CM.89012.I

ADM–1 – MN.00114.E – 004 135

Fig. 10.4 Tributary line set–up

Line under test

Fig. 10.5 Laser functionality test

Tx

Rx

Tx

Rx

West Side East Side


CM.89012.I

ADM–1 – MN.00114.E – 004136

Fig. 10.6 Laser facilities

ADM–1 – MN.00114.E – 004 137


5Section

Maintenance


CM.89012.I

ADM–1 – MN.00114.E – 004138

ADM–1 – MN.00114.E – 004 139

11. MAINTENANCE GUIDELINES

11.1 GENERAL

Maintenance normally consists of two steps:

• periodical checks

• corrective.

Periodical checks have the purpose to verify the equipment performances in absence of alarmcondition.

This can be done by connecting the SCT/LCT program to the supervision ports and then runthe G.826 performances made over the SOH (bytes B1/B2/M1) and over any individual VC12path (BIP–2 of VC5).

This checks can be also done through the NMS5UX system permanently connected in thenetwork to be supervised.

Corrective maintenance takes place as soon as one or more alarm conditions are in existence.The sequence of operation to be carried out is shown in Fig. 11.1.


11


CM.89012.I

ADM–1 – MN.00114.E – 004140

Fig. 11.1 Flow diagram: Corrective maintenance

START

YES

NO

IN THE STATION IN THE MAINTENANCE CENTER

Activation of one or morealarm indicators on the

equipment front or displayedby the connected software

programs: (SCT/LCTor NMS5UX)

Location of the faulty module(see document “Troubleshooting”)

Request of unitreplacement

Withdrawal of the spare unit

Replacement of the faulty unitwith the spare one and unitrealignment if necessary

Has the alarmindication

disappeared?

Normal conditionrestored

Forwarding of the faulty moduleto the repair center

ADM–1 – MN.00114.E – 004 141

12. UNIT REPLACEMENT

12.1 UNIT REPLACEMENT

The correct procedure for unit replacement is described in this chapter.

LIU, Tributary interface units (TIU), MIU

• Disconnect all external cables from the faulty unit.

• Extract the faulty unit by means of special handles

• Insert the spare unit, push until the front panel is aligned with the other cards.

• Check by SCT that the inserted unit has been located by the system.

SMU



• Insert the spare unit, push until the front panel is aligned with the other cards.Check that Red Led is ON and after about 10 sec. is OFF.

• Check by SCT that the inserted unit has been located by the system.

MCU, SMCU



• Insert the spare unit, push until the front panel is aligned with the other cards.Wait for the start of unit (about 1 minute) than by SCT configure again the new unit likethe one before replaced (if necessary by downloading of a saved configuration).Check that configuration is correct, then activate the unit by SCT–> equipment –> start–> start application (the status mark must switch from red to green).


12


CM.89012.I

ADM–1 – MN.00114.E – 004142

ADM–1 – MN.00114.E – 004 143

13. ACCESSORIES

13.1 LIST AND USE OF ACCESSORIES

To make easier the use of the accessories, their detailed explanation and use on the equipmentare here below provided.

Tab. 13.1

SIAE code Accessories Use

F15056LC/LC

L = 3 m

Optical fibre cable for localloop S.1–1, L.1–1, L.1–2

F15055LC/LC

L = 3 m

Optical fibre cable for localloop I1

F15041(FC–PC/LC)MULTIMODE

L = 3 m

Optical fibre cable for con-necting optical–interfaceequipment to instrumentswith FC–PC connections

F15039(FC–PC/LC)SINGLEMODE

L = 3 m

F201541.0/2.3/BNC

L = 3 m

Cable for measurement on2 Mbit/s 75 Ohm tributarychannels or STM–1 elec-trical interface

F03365

L = 2.5 m

26–pin cable for measure-ments on 2 Mbit/s, 120Ohm tributary channels

Z17659 Tool for tributary 75 Ohmcable extraction


13


CM.89012.I

ADM–1 – MN.00114.E – 004144

ADM–1 – MN.00114.E – 004 145

14. TROUBLESHOOTING

14.1 GENERAL

An abnormal operating condition occurs whenever one of the following alarm condition: criticalmajor, minor and warning is activated on the front (see Fig. 14.1, Fig. 14.2 and Fig. 14.3) ordisplayed by the managers SCT/NMS5UX.Investigation must be made in order to discover if cause of faulty/degradation is attributed to theequipment or is external to the equipment. In case of equipment failure, it is necessary to locatethe faulty unit and replace it with spare.

Warning: if the controller unit is faulty the equipment configuration must be loaded as perprocedure of chapter 15, par. 3.

14.2 FAULT LOCATION

The best and reliable method of investigation consists of the alarm root processing.

To the purpose proceed as follows:

• run the SCT program

• perform the connection to the network through the SCT

• select the alarmed unit

• select menu “Equipment” and then “View current alarms”

Fig. 14.4 will be shown and the current alarm roots will be displayed.

All the traps (alarm roots) are grouped in equipment functionalities in order to make theinvestigation easy. The traps grouped into PPI group alarms, sets group alarms, STM–1 groupalarms, generally indicates external alarms not given by the equipment.

The “Unit alarm grouping” indicates an equipment faulty unit.

The faulty unit must be replaced with spare.


14


CM.89012.I

ADM–1 – MN.00114.E – 004146

Fig. 14.1 Alarm indications for ADM–1 4RU version

C36054

2M

1 11111

12 16

C36054

2M

1 11111

12 16

C36054

2M

1 11111

12 16

C36054

2M

1 11111

12 16

C36054

2M

1 11111

12 161612

1 1111

1

2M

C36054

C36054

2M

1 11111

12 161612

1 1111

1

2M

C36054

–+

C36050

ON

ON

C36050

+ –

R

BAA

LSCM m

WT

ES

TR

S232

SC

TU

SE

R I/O

& V

11

C36058

EO

W

2MC

36056A

CT

C36056

2M

C36060

10 Base T

RX

TX

C36064

LOS

EW

LOS

LOS

WE

LOS

C36064

LAN

Pow

er O

N

LOS

(Lo

ss O

f ST

M–1

Sig

nal)

ALS

CM m

WT

ES

T

ALA

RM

AR

EA

Crit

ical

Aut

omat

ic (

lase

r)sh

ut d

own

disa

bled

War

ning

Maj

or

Min

orM

anua

lop

erat

or

R

Res

etµ

P

activ

ity

AC

TW

orki

ng c

ondi

tion

Car

d fa

il

* O

N la

ser

ON

(op

tiona

l uni

t)


CM.89012.I

ADM–1 – MN.00114.E – 004 147


AC

TA

CT

WE

C36063

C36063

C36

054

1

1111

112

16

R

BA

ALSC

M mW

TE

ST

RS

232S

CT

US

ER

I/O &

V11

C36058

EO

W

C36056

AC

T

C36056

2M

C36060

RX

TX

C36

054

1

1111

112

16

C36

054

1

1111

112

16

2M

C36

054

1

1111

112

16

ON ON

ALS

CM m

WT

ES

T

ALA

RM

AR

EA

Crit

ical

Aut

omat

ic (

lase

r)sh

ut d

own

disa

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War

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Min

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anua

lop

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AC

TW

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ng c

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Car

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ilTX

LOS

Loss

of S

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lLa

ser

ON

(op

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N

Res

etµ

P

Pow

er O

NLA

N a

ctiv

ity


CM.89012.I

ADM–1 – MN.00114.E – 004148


AC

TA

CT

WE

C36063

C36063

ALSC

M mW

TE

ST

RS

232S

CT

US

ER

I/O &

V11

C36058

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W

C36

054

1

1111

112

16

C36

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1

1111

112

16

ON

ALS

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Pow

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P


CM.89012.I

ADM–1 – MN.00114.E – 004 149

Fig. 14.4 Equipment current alarm


CM.89012.I

ADM–1 – MN.00114.E – 004150

ADM–1 – MN.00114.E – 004 151

15. PROCEDURES TO BACKUP THEFULL EQUIPMENTCONFIGURATION

15.1 GENERAL

The full equipment configuration backup is used in case of replacement of faulty controller unitwith spare. The equipment configuration download permits to restore the equipment originaloperating condition.

Warning: As soon as the download has been executed and the new parameters stored in thecontroller MIB it is necessary to proceed for their activation in the following way:

1. run the SCT program

2. from “Subnetwork Craft Terminal window” select menu “Equipment” and then “LCTInterface” until “Add Drop Multiplexer” window is displayed.

3. Select row “Equipment” from “Equipment View” until “Equipment” window is displayed.

4. From “Equipment” select “Start” and “Start Applications” to finish.

15.2 CONFIGURATION UPLOAD

Foreword: It is advisable to upload the configuration during the first installation. Proceed asfollows by using the SCT/LCT software program:

1. Select “Equipment Configuration Wizard” from menu “Tools”; “EquipmentConfiguration Wizard” window will be displayed.

2. Select “Upload” and then “Backup Full Equipment Configuration”; “TemplateSelection” window will be displayed.


15


CM.89012.I

ADM–1 – MN.00114.E – 004152

3. Select the correct equipment template (in case of uncorrected choice the backup willbe aborted).

4. Press OK and then select the equipment to be uploaded from “Upload ConfigurationFile” window.

5. Press OK and then edit the file name from “Save backup as” window.

6. Press Save; “Equipment Configuration Wizard: Complete Backup” window will appear.

The window shows dynamically the backup procedure. If everything is OK, at the endof the upload will appear the word “done” showing the procedure success.

7. Press OK to finish.

15.3 CONFIGURATION DOWNLOAD

Once the spare basic shelf has been installed proceed as follows:

1. Select “Equipment Configuration Wizard” from menu “Tools”. “EquipmentConfiguration Wizard” window will be displayed.

2. Select “Download” and then “Restore Full Equipment Configuration” fromEquipment Configuration Wizard. “Select Backup File” window will be displayed.

3. Select the wanted backup file with extension .bku you are looking for and then pressOpen. “Download Configuration File” window will be displayed.

4. Select the equipment to download and then press OK; “Equipment ConfigurationWizard: Complete restore” window will be displayed. This window shows dynamically the download operation. The word “done” indicates that download has been successfully.

5. Press OK to finish.

Warning: In case of addresses change it is necessary to restart the equipment.

ADM–1 – MN.00114.E – 004 153


6Section

Programming andsupervision


CM.89012.I

ADM–1 – MN.00114.E – 004154

ADM–1 – MN.00114.E – 004 155

16. EQUIPMENT PROGRAMMING ANDSUPERVISION

16.1 GENERAL

The ADM equipment has been designed to be easily programmed and supervised. To thepurpose the following software programs can be used:

• SCT/LCT: management and supervision of an IP/OSI subnetwork consisting of up to100 SIAE network elements

• NMS5–UX: management and supervision of an IP/OSI network consisting of SIAEnetwork elements

For program details refer to the corresponding documentation. SCT/LCT documentation isavailable as help on–line.


16


CM.89012.I

ADM–1 – MN.00114.E – 004156

ADM–1 – MN.00114.E – 004 157


7Section

Composition


CM.89012.I

ADM–1 – MN.00114.E – 004158

ADM–1 – MN.00114.E – 004 159

17. EQUIPMENT COMPOSITION

17.1 GENERAL

ADM–1 is a very flexible and modular platform that can be used forterminal/linear–add–drop/ring–add–drop applications, either as 1+0 or 1+1 multiplexer.

The ADM–1 consists of a 19” compatible sub–rack available in three different mechanicalversions.

17.2 ADM–1 4RU MECHANICAL LAYOUT


TIUor

TIU TSU

TIUor

TIU TSU

TIUor

TIU Co

ver

TIUor

TIU Co

ver

TIU TIU TIU TIU


17


CM.89012.I

ADM–1 – MN.00114.E – 004160

The ADM–1 4 RU version shelf can house the following units:

• eight tributary interface unit (TIU) – TIU modules include tributary traffic interfaces (E1,STM–1, E3/T3 or Ethernet)

• two power supply unit (PSU main and reserve)

• one management interface unit (MIU) (optional)

• two SDH multiplexing unit (SMU main and reserve) – SMU modules include SDHprocessing and cross–connect functionality

• one main controller unit (MCU) – MCU module includes the main system CPU andprovides Service channels, LCT access and alarms IN/OUT

• two line interface unit (LIU main and reserve) – LIU modules provide STM–1 or STM–4aggregate traffic interfaces

• two tributary switch unit (TSU) – TSU modules provide tributary (STM–1, E3/T3,Ethernet) traffic protection switch

17.2.1 ADM–1 4RU version configuration list

Depending on the equipping of the common parts, the ADM–1 can be configured as shown inthe following table.


CM.89012.I

ADM–1 – MN.00114.E – 004 161

Tab. 17.1

Configurations MCU LIU–M LIU–R SMU–M SMU–R TIU2 Mb/s

(E1)

TIU 34/45Mb/s,

STM1 Eth

TSU

(E1) STM1, Eth

Unprotected

1+0 terminal multiple-xer (see Fig. 17.2)

X X – X – X X –

1+0 double terminalmultiplexer with up to63 E1 (see Fig. 17.2)

X X – X – X X –

1+0 double terminalmultiplexer with up to126 E1 (seeFig. 17.3)

X X – X X X X –

1+0 drop–insert withup to 63 E1 (seeFig. 17.2)

X X – X – X X –

1+0 drop–insert withup to 126 E1(seeFig. 17.3)

X X – X X X X –

Protected

1+1 terminal multiple-xer with line protec-tion (see Fig. 17.2)

X X – X – X X –

1+1 terminal multiple-xer with line andequipment protection(see Fig. 17.5)

X X X X X X X –

1+1 terminal multiple-xer with line, equip-ment and tributaryprotection (seeFig. 17.6)

X X X X X X X X

1+1 drop–insert withline protection (seeFig. 17.4)

X X X X – X X –

1+1 with drop–insertwith line and equipe-ment protection (seeFig. 17.5)

X X X X X X X –

1+1 drop–insert withline, equipment andtributary protection(see Fig. 17.6)

X X X X X X X X


CM.89012.I

ADM–1 – MN.00114.E – 004162

The power supply (PSU) can be duplicated (for redundancy) in all the above mentionedconfigurations.

Fig. 17.2

Coveror

TIU Co

ver

Coveror

TIU Co

ver

Cover

Cover

Coveror

TIU Co

ver

Coveror

TIU Co

ver

E3/T3, STM1, Ethernetup to 63E1

TIU TIU TIU TIU

Fig. 17.3

TIUor

TIU Co

ver

TIUor

TIU Co

ver

Cover

TIUor

TIU Co

ver

TIUor

TIU Co

ver

E3/T3, STM1, Ethernet

Additional E1

up to 63E1

TIU TIU TIU TIU


CM.89012.I

ADM–1 – MN.00114.E – 004 163

Fig. 17.4

Coveror

TIU Co

ver

Coveror

TIU Co

ver

Cover

Coveror

TIU Co

ver

Coveror

TIU Co

ver

E3/T3, STM1, Ethernetup to 63E1

TIU TIU TIU TIU

Fig. 17.5

TIUor

TIU Co

ver

TIUor

TIU Co

ver

TIUor

TIU Co

ver

TIUor

TIU Co

ver

E3/T3, STM1, Ethernet

Additional E1

up to 63E1

TIU TIU TIU TIU


CM.89012.I

ADM–1 – MN.00114.E – 004164

Fig. 17.6

TIUor

TIU TSU

TIUor

TIU TSU

TIUor

TIU Cov

er

TIUor

TIU Cov

er

E3/T3, STM1, Ethernet(redundancy with switch)

Additional E1

up to 63E1

TIU TIU TIU TIU


CM.89012.I

ADM–1 – MN.00114.E – 004 165



PSU–R

PSU–M

MIU

TU

LIUSMU

TUTU

MCU PSU–RPSU–R

PSU–MPSU–M

MIUMIU

TUTU

LIULIUSMUSMU

TUTUTUTU

MCUMCU

TUTUTIU or

TIU

cover TUTUTIU or

TIU

cover TUTUTIU or

TIU

cover TUTUTIU or

TIU

cover


• four tributary interface unit (TIU) – TIU modules include tributary traffic interfaces (E1,STM–1, E3/T3 or Ethernet)

• two power supply unit (PSU main and reserve)

• one management interface unit (MIU)

• one SDH multiplexing unit (SMU) – SMU modules include SDH processing andcross–connect functionality

• one main controller unit (MCU) – MCU module includes the main system CPU andprovides Service channels, LCT access and alarms IN/OUT

• one line interface unit (LIU) – LIU modules provide STM–1 or STM–4 aggregate trafficinterfaces


CM.89012.I

ADM–1 – MN.00114.E – 004166


With the same common part equipment the ADM–1 can be configured as shown in the followingtable:

Tab. 17.2

Configurations MCU LIU SMU TIU

2 Mb/s(E1)

34/45 Mb/s,STM1, Eth

Unprotected

1+0 terminal multiplexerwith up to 63 E1 (see Fig. 17.8)

1+0 double terminal multi-plexer with up to 63 E1

(see Fig. 17.8)

X X X X X

1+0 drop–insert with up to63 E1 (see Fig. 17.8)

Protected

1+1 terminal multiplexerwith line protection

(see Fig. 17.8)X X X X X

The power supply (PSU) can be duplicated for redundancy.


PSU–R

PSU–M

MIU

TU

LIUSMU

TUTU

MCU PSU–RPSU–R

PSU–MPSU–M

MIUMIU

TUTU

LIULIUSMUSMU

TUTUTUTU

MCUMCU

TUTUTIU or

TIU

cover TUTUTIU or

TIU

cover TUTUTIU or

TIU

cover TUTUTIU or

TIU

cover

Up to 63xE1 or

34/45 Mbit/s, STM–1, Eth


CM.89012.I

ADM–1 – MN.00114.E – 004 167



TIU

coverTIU or

TIU

coverTIU or


• two tributary interface unit (TIU) – TIU modules include tributary traffic interfaces (E1,STM–1, E3/T3 or Ethernet)

• one power supply unit

• one SDH multiplexing and main controller unit (SMCU) – SMCU modules include:

– SDH processing and cross–connect functionality

– the main system CPU and provides Service channels, LCT access and alarmsIN/OUT

• one line interface unit (LIU) – LIU modules provide STM–1 aggregate traffic interfaces


CM.89012.I

ADM–1 – MN.00114.E – 004168


With the same common part equipment, the ADM–1 can be configured as shown in the followingtable.

Tab. 17.3

Configurations PSU LIU SMCU TIU

2 Mb/s(E1)

34/45 Mb/s,STM1, Eth

Unprotected

1+0 terminal multiplexerwith up to 32 E1 (see

Fig. 17.10)

1+0 double terminal multi-plexer with up to 32 E1

(see Fig. 17.10)

X X X X X

1+0 drop–insert with up to32 E1 (see Fig. 17.10)

Protected

1+1 terminal multiplexerwith line protection (see

Fig. 17.10)X X X X X

Fig. 17.10 ADM–1 RU version

TIU

coverTIU or

TIU

coverTIU or

Up to 32 x E1 or

34/45 Mbit/s,STM1, Eth

mn00114e.pdf

Documents

alarm interface

aggregate interface

mbits interface e1

tiu tributary interface

unit description

mbits ethernet interface

mbits interface t3

ru version