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GSM/EDGE BSS, Rel. RG10(BSS), Operating Documentation, Issue 07

Engineering for Flexi BSC

DN70590621

Issue 1-1

Confidential

2 DN70590621Issue 1-1


Id:0900d805807a51d4Confidential

The information in this document is subject to change without notice and describes only the product defined in the introduction of this documentation. This documentation is intended for the use of Nokia Siemens Networks customers only for the purposes of the agreement under which the document is submitted, and no part of it may be used, reproduced, modified or transmitted in any form or means without the prior written permission of Nokia Siemens Networks. The documentation has been prepared to be used by professional and properly trained personnel, and the customer assumes full responsibility when using it. Nokia Siemens Networks welcomes customer comments as part of the process of continuous development and improvement of the documentation.

The information or statements given in this documentation concerning the suitability, capacity, or performance of the mentioned hardware or software products are given "as is" and all liability arising in connection with such hardware or software products shall be defined conclusively and finally in a separate agreement between Nokia Siemens Networks and the customer. However, Nokia Siemens Networks has made all reasonable efforts to ensure that the instructions contained in the document are adequate and free of material errors and omissions. Nokia Siemens Networks will, if deemed necessary by Nokia Siemens Networks, explain issues which may not be covered by the document.

Nokia Siemens Networks will correct errors in this documentation as soon as possible. IN NO EVENT WILL Nokia Siemens Networks BE LIABLE FOR ERRORS IN THIS DOCUMENTA-TION OR FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO SPECIAL, DIRECT, INDI-RECT, INCIDENTAL OR CONSEQUENTIAL OR ANY LOSSES, SUCH AS BUT NOT LIMITED TO LOSS OF PROFIT, REVENUE, BUSINESS INTERRUPTION, BUSINESS OPPORTUNITY OR DATA,THAT MAY ARISE FROM THE USE OF THIS DOCUMENT OR THE INFORMATION IN IT.

This documentation and the product it describes are considered protected by copyrights and other intellectual property rights according to the applicable laws.

The wave logo is a trademark of Nokia Siemens Networks Oy. Nokia is a registered trademark of Nokia Corporation. Siemens is a registered trademark of Siemens AG.

Other product names mentioned in this document may be trademarks of their respective owners, and they are mentioned for identification purposes only.

Copyright © Nokia Siemens Networks 2011. All rights reserved

f Important Notice on Product SafetyThis product may present safety risks due to laser, electricity, heat, and other sources of danger.

Only trained and qualified personnel may install, operate, maintain or otherwise handle this product and only after having carefully read the safety information applicable to this product.

The safety information is provided in the Safety Information section in the “Legal, Safety and Environmental Information” part of this document or documentation set.

The same text in German:

f Wichtiger Hinweis zur Produktsicherheit Von diesem Produkt können Gefahren durch Laser, Elektrizität, Hitzeentwicklung oder andere Gefahrenquellen ausgehen.

Installation, Betrieb, Wartung und sonstige Handhabung des Produktes darf nur durch geschultes und qualifiziertes Personal unter Beachtung der anwendbaren Sicherheits-anforderungen erfolgen.

Die Sicherheitsanforderungen finden Sie unter „Sicherheitshinweise“ im Teil „Legal, Safety and Environmental Information“ dieses Dokuments oder dieses Dokumentations-satzes.

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Table of contentsThis document has 76 pages.

Summary of changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

2 Introducing Flexi BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102.1 Overview of Flexi BSC in GSM/EDGE mobile network . . . . . . . . . . . . . 102.2 DX 200 system architecture and Flexi BSC block diagram . . . . . . . . . . 112.3 DX 200 protection principles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3 Mechanical construction of the Flexi BSC . . . . . . . . . . . . . . . . . . . . . . . 163.1 Flexi BSC cabinets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 163.2 Cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 203.3 Plug-in units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 213.4 Cabling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

4 Flexi BSC cabinet configuration and capacity . . . . . . . . . . . . . . . . . . . . 234.1 Cabinet descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234.1.1 Cabinets. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 234.1.2 Functional unit configuration of the cabinets . . . . . . . . . . . . . . . . . . . . . 234.1.3 Panels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 254.1.4 Other items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264.2 TCSM3i for combined BSC/TCSM installation option . . . . . . . . . . . . . . 26

5 Functional unit descriptions for the Flexi BSC . . . . . . . . . . . . . . . . . . . . 285.1 Bit group switch (GSW2KB-A) in the Flexi BSC . . . . . . . . . . . . . . . . . . 285.2 BSC signalling unit (BCSU) in the Flexi BSC. . . . . . . . . . . . . . . . . . . . . 295.3 Clock system (CLS) in the Flexi BSC . . . . . . . . . . . . . . . . . . . . . . . . . . 345.4 Ethernet-based message bus (EMB) in the Flexi BSC . . . . . . . . . . . . . 355.5 ETIP and EET units in the S14 Flexi BSC first deliveries . . . . . . . . . . . 355.6 Exchange Terminal (ET) in Flexi BSC . . . . . . . . . . . . . . . . . . . . . . . . . . 415.7 IP interfaces in the Flexi BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 445.7.1 LAN switching unit (LANU) in the Flexi BSC . . . . . . . . . . . . . . . . . . . . . 455.8 Marker and cellular management unit (MCMU) in Flexi BSC . . . . . . . . 475.9 Operation and maintenance unit (OMU) in the Flexi BSC . . . . . . . . . . . 485.10 STMU and SET in Flexi BSC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 515.11 Power distribution fuse unit (PDFU) in Flexi BSC . . . . . . . . . . . . . . . . . 58

6 Overview of the installation site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 656.1 Equipment room layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 656.2 Cable structures and estimated power consumption . . . . . . . . . . . . . . . 66

7 Alarm system for Flexi BSC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 677.1 Collection of alarms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 677.2 Alarms from the TCSM3i . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 687.3 Alarms from the TCSM2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 687.4 BTS alarm handling in the Flexi BSC. . . . . . . . . . . . . . . . . . . . . . . . . . . 697.5 BSS transmission equipment handling . . . . . . . . . . . . . . . . . . . . . . . . . 697.6 Nokia Siemens Networks NetAct network management system . . . . . . 69

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7.7 EXAU-A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

8 Synchronisation for Flexi BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72

9 Management network topology for Flexi BSC. . . . . . . . . . . . . . . . . . . . . 75

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List of figuresFigure 1 Flexi BSC in the GSM/EDGE (and 3G) mobile network . . . . . . . . . . . . 11Figure 2 Block diagram of Flexi BSC (S14 release). . . . . . . . . . . . . . . . . . . . . . . 12Figure 3 BSCC cabinet, S14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17Figure 4 Side cable conduit (SCC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Figure 5 2 mm hard metric cartridge and the cartridge shelf . . . . . . . . . . . . . . . . 21Figure 6 Equipping of the BSCC cabinet (IC209-C) in Flexi BSC with optional ca-

bling cabinet on S14 level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Figure 7 Equipping of the BSCC cabinet (IC209-A) in Flexi BSC with cabling cabinet

on S14 level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Figure 8 GSW2KB-A equipment in the SGC1C-A cartridge . . . . . . . . . . . . . . . . 29Figure 9 BCSU 0 equipment in the CC3C-B cartridge . . . . . . . . . . . . . . . . . . . . . 30Figure 10 BCSU 1 - BCSU 6 equipment in the BC1C-B cartridge . . . . . . . . . . . . 31Figure 11 Clock and Synchronisation Unit (CLS) in SGC1C-A cartridge. . . . . . . . 34Figure 12 ETIP1-A Exchange Terminal for IP Transmission in GTIC parts (GTIC 0

and GTIC 1) of SGC1C-A cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . 36Figure 13 ET16 Exchange Terminal plug-in units in SGC1C-A cartridges . . . . . . 42Figure 14 LAN connection principle in the Flexi BSC, S14 release . . . . . . . . . . . . 45Figure 15 LANU units in the Flexi BSC new deliveries on S14 level . . . . . . . . . . . 46Figure 16 MCMU equipment in the DC3C-B cartridge on S14 level . . . . . . . . . . . 47Figure 17 S14-level Operation and Maintenance Unit (OMU) in CC3C-A cartridge 49Figure 18 ETS2 SDH/SONET Exchange Terminal plug-in units in GTIC parts (GTIC

0 and GTIC 1) of SGC1C-A cartridges . . . . . . . . . . . . . . . . . . . . . . . . . 52Figure 19 Two PDFU-B units in the upper part of the BSCC cabinet . . . . . . . . . . 59Figure 20 Power distribution in S14 Flexi BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . 61Figure 21 Power distribution diagram of the S14 Flexi BSC first-delivery cabinet

BSCC with two PDFU-Bs fed by two protecting power supply pairs (four 63A fuses) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62

Figure 22 Power distribution diagram of the S14 Flexi BSC first-delivery cabinet BSCC with two PDFU-Bs fed by one protecting power supply pair (two 80 A or two 100 A fuses) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63

Figure 23 Power supply to the BSCC cabinet with two PDFU-Bs fed by two protecting power supply pairs (four 63A fuses) . . . . . . . . . . . . . . . . . . . . . . . . . . . 64

Figure 24 Power supply to the BSCC cabinet with two PDFU-Bs fed by one protecting power supply pair (two 80 A or two 100 A fuses). . . . . . . . . . . . . . . . . . 64

Figure 25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65Figure 26 Implementation model of the alarm system . . . . . . . . . . . . . . . . . . . . . . 67Figure 27 Block diagram of the EXAU-A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71Figure 28 Synchronisation of the Flexi BSC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73Figure 29 NetAct system interfaces . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 75

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List of tablesTable 1 BSC network elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9Table 2 GSW2KB-A equipment in the SGC1C-A cartridge . . . . . . . . . . . . . . . . 29Table 3 BCSU 0 equipment in the CC3C-B cartridge . . . . . . . . . . . . . . . . . . . . . 30Table 4 BCSU 1 - BCSU 6 equipment in the BC1C-B cartridge . . . . . . . . . . . . 32Table 5 Clock and Synchronisation Unit (CLS) in SGC1C-A cartridge . . . . . . . . 34Table 6 SGC1C-A cartridge (GTIC 0 and GTIC 1), maximum ET connectivity is in

use (both Hotlink pairs are cabled) per ETIP1-A plug-in unit . . . . . . . . . 37Table 7 GTIC 0 and GTIC 1, active and standby EET units are on different ETIP1-

A plug-in units (active EET on active ETIP1-A and standby EET on protect-ing ETIP1-A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

Table 8 ETIP indexes, EET and ET numbers and Control PCMs in GTIC 0 and GTIC 1 parts of SGC1C-A cartridges when transmission protection is in use and both Hotlink pairs are cabled . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Table 9 ETIP index, EET and ET numbers and Control PCMs in GTIC 0 and GTIC 1 parts of SGC1C-A cartridges when equipment protection is used . . . 40

Table 10 ET16 plug-in units in SGC1C-A cartridges (GTIC 0 or GTIC 1; ETC 0 or ETC2; ETC 1 or ETC 3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Table 11 Plug-in units in LANU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46Table 12 Location identification wiring connectors in BC1C-B cartridges . . . . . . . 46Table 13 Plug-in units of the S14 first delivery Flexi BSC MCMU . . . . . . . . . . . . 47Table 14 SGC1C-A cartridge (GTIC 0 and GTIC 1), two active and two standby

SETs in use per ETS2 when transmission protection is used . . . . . . . . 52Table 15 GTIC 0 and GTIC 1, active SETs on active ETS2 and standby SETs on

protecting ETS2 when equipment protection is used . . . . . . . . . . . . . . . 53Table 16 STMU index, SET and ET numbers and Control PCMs in GTIC 0 and GTIC

1 parts of SGC1C-A cartridges when transmission protection is in use and both STM-1/OC-3 interfaces (two active SETs and two standby SETs; both Hotlink pairs are cabled) of ETS2 plug-in units are used . . . . . . . . . . . . 54

Table 17 STMU index, SET and ET numbers and Control PCMs in GTIC 0 and GTIC 1 parts of SGC1C-A cartridges when equipment protection is used . . . 56

Table 18 Performance characteristics of the CL3TG-UA plug-in unit . . . . . . . . . . 74Table 19 Line coding/decoding standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74

DN70590621 7

Engineering for Flexi BSC Summary of changes

Id:0900d805807a7b02Confidential

Summary of changesChanges between document issues are cumulative. Therefore, the latest document issue contains all changes made to previous issues.

Issue 1-1Information on new cabinet variant IC209-C added to document.

Issue 1-0This the first issue of Engineering for Flexi BSC and is to be used in S14 first deliveries.

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Id:0900d805803bf656Confidential

Overview

1 OverviewThe Engineering for Flexi BSC provides the basic information needed for the installation planning of the first-delivery Flexi BSC.

The following items are discussed:

• Introducing Flexi BSC • Mechanical construction of Flexi BSC • Flexi BSC cabinet configuration and capacity • Functional unit descriptions for Flexi BSC

• BSC signalling unit (BCSU) in Flexi BSC • Bit group switch (GSW2KB-A) in Flexi BSC • Clock system in Flexi BSC • Ethernet Message Bus (EMB) in Flexi BSC • ETIP and EET units in the S14 Flexi BSC first deliveries • Exchange Terminal (ET) in Flexi BSC • IP interfaces in Flexi BSC • Marker and cellular management unit (MCMU) in Flexi BSC • Operation and maintenance unit (OMU) in Flexi BSC • STMU and SET in Flexi BSC • Power distribution fuse unit (PDFU) in Flexi BSC

• Overview of the Flexi BSC installation site • Alarm system of Flexi BSC • Synchronisation for Flexi BSC • Management network topology for Flexi BSC

The subjects covered do not, however, include the installation planning instructions for the site power supply equipment or for the PCM and alarm distribution frames.

The site requirements for the Flexi BSC are discussed in Installation Site Requirements for Flexi BSC and TCSM. It provides the following information:

• dimensioning of the power supply and power distribution • environmental requirements • requirements for ventilation and air conditioning • cabling

External cabling is discussed in Connector Panels and External Cables in Flexi BSC and TCSM3i.

BSC network elementsAn M92 mechanic-based BSC is referred to as BSCi/BSC2i, and an M98 mechanic-based BSC is referred to as Flexi BSC. The terms BSC, BSCi, BSC2i, and Flexi BSC are explained in the following table.

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Engineering for Flexi BSC Overview

Id:0900d805803bf656Confidential

Note that the new generation transcoder submultiplexer (TCSM3i) can be attached to Flexi BSC as part of the TCSM3i for combined BSC/TCSM installation option.

Use of product namesNote that the product names in the documentation may be written with or without the variant designation. For example, 'PCU2' may be used instead of 'PCU2-E'.

BSC = Base Station Controller, a general term for all BSC network elements

General name Product name Explanation

BSCi/BSC2i BSCi High capacity (upgraded) version of the first generation DX 200 BSC (BSCE)

BSC2i High capacity version of the second gener-ation DX 200 BSC2

Flexi BSC product family

BSC3i 660 660 TRX one cabinet configuration, upgradable to Flexi BSC

BSC3i 1000/2000 1000 TRX one-cabinet or 2000 TRX two-cabinet configuration, upgradable to Flexi BSC

Flexi BSC 3000 TRX one-cabinet configuration (S14)

Table 1 BSC network elements

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Introducing Flexi BSC

2 Introducing Flexi BSCThe following sections describe the basic functionality of Flexi BSC. The emphasis is on the hardware implementation of the system.

2.1 Overview of Flexi BSC in GSM/EDGE mobile networkFlexi BSC is a modern fault tolerant system for GSM 800/GSM 900/GSM 1800/GSM 1900 networks. Flexi BSC is based on modular software and hardware architecture. The distributed architecture of Flexi BSC is implemented with a high-capacity and protecting multiprocessor system - the DX 200 computing platform. The system enables the distri-bution of processing capacity to several computer units with dedicated tasks.

The DX 200 computing platform product family covers a wide application area in GSM/EDGE mobile networks and fixed telephone networks. The DX 200 computing platform product family contains products for digital mobile applications, such as base station controller (Flexi BSC product family), third-generation transcoder submultiplexer (TCSM3i), second-generation transcoder submultiplexer (TCSM2), DX MSC (MSC), MSC Server, DX HLR (HLR), and 2G serving GPRS support node (SGSN), and also contains fixed network applications.

The main function of Flexi BSC is to control and manage the base station subsystem (BSS) and the radio channels. Based on long experience in cellular networks, Flexi BSC is designed for efficient use of radio resources and is easy to operate and maintain. The BSC is a stable, mature and highly reliable product. One major feature of Flexi BSC is its field-proven multivendor functionality.

Together with the functionally distributed modular architecture of the DX 200 computing platform and the latest commercially available industry standard hardware components, Flexi BSC has high capacity and is simple and cost-efficient to expand.

Figure Flexi BSC in the GSM/EDGE (and 3G) mobile network shows the position of Flexi BSC in the GSM/EDGE and 3G mobile network.

DN70590621 11

Engineering for Flexi BSC Introducing Flexi BSC


Figure 1 Flexi BSC in the GSM/EDGE (and 3G) mobile network

Modular structure of Flexi BSCFlexi BSC is designed with a modular structure enabling a distributed processing archi-tecture. This quality, combined with the wide range of both standard and optional features available, makes it readily adaptable to the needs of each individual operator, as it allows for capacity dimensioning according to individual need. External costs result-ing from surplus capacity are avoided, and the operator can choose a selection of features and services tailored to meet the demands of his customers. When additional capacity or new facilities are needed, the network element can easily be expanded by adding new hardware and/or software modules to the existing configuration.

The modular structure also allows for a compact design, which makes the network element easy to install and helps to maintain efficient power consumption.

2.2 DX 200 system architecture and Flexi BSC block diagramLike the previous generations of DX 200 products, Flexi BSC network element is designed with a modular software and hardware structure, which enables a distributed processing architecture. The distribution of processes is achieved by using a multi-pro-cessor system, in which the functions of the network element are divided among several functional entities, called functional units. Each functional unit has its own, separate hardware and software; most of them are equipped with a dedicated computer. These units are referred to as computer units, and they are interconnected by the Ethernet-based Message Bus (EMB).

Each functional unit has a separate task group to handle. For example, the switch matrix has been organised as a separate unit, group switch (GSW2KB-A) and it is controlled

2G

BTS BSC

WCDMA

BTS

WCDMA

RNC

3G

Radio Access Network Core Network

Landline

Network

(PSTN/ISDN)

IP

MSC

IN

Transcoder

SubmultiplexerSIM

card

MGW

GSM/

WCDMA

mobile

GSM mobile

Navigator

WCDMA

mobile

HLR

3G SGSN

2G SGSN

Internet

Intranet

3G SGSN

3G SGSN

abc def

mnojklghi

pqrs tuv wxyz

+

dn03524007

12 DN70590621




by another unit, called the marker and cellular management unit (MCMU). The key oper-ation and maintenance functions are performed by the operation and maintenance unit (OMU), the external PCM lines are interfaced by the Exchange Terminals (ETs), and the transcoder submultiplexer (TCSM) performs transcoding and submultiplexing functions.

Figure Block diagram of Flexi BSC (S14 release) presents the block diagram of the network element.

Figure 2 Block diagram of Flexi BSC (S14 release)

The most important functional units of Flexi BSC are:

• Group switch (GSW2KB-A) - switches speech and data, and connects signalling cir-cuits. The maximum size of a GSW2KB-A is 2048 x 2M PCMs.

MCMU

Gb over IP

Gb over IP

SET

Gb

CLS

MSCA ter A

SWU

ET

OMUBCSU

EMB

PCU

Hard Disk

Drive

Internal LAN Switch plug-in unit

for CPU LAN

IP

Internal

LAN

Switch

plug-in unit

for

PCU LAN

Gb over IP

Connector panel

(EMC & NE interface)

MSCTCSM3i-part

A ter A

Abis

CLS

SET or

EET

Memory stick

Gb

Abis

Connector panel


Connector panel


EET

Gb

Abis

A ter

GSW2KB-A

MSCA

TCSM

A MSCSET

EET

ET ET

EET TCSM

TCSM

DN70633641

DN70590621 13



• Base station controller signalling unit (BCSU) - handles the BSC signalling functions. The optional packet control unit (PCU) is included in BCSUs, when GPRS service is implemented. It implements the GPRS packet control functions in the BSC.

• Marker and cellular management unit (MCMU) - controls and supervises the GSW2KB-A and acts as a BSC SYM (system maintenance) unit in case of OMU failure.

• Operation and maintenance unit (OMU) - serves as an interface between the user and the BSC, but also works as a SYM unit of BSC and automatically supervises the BSC.

• Ethernet message bus (EMB) - interconnects the functional units of BSC. EMB consists of a protecting L2 LAN switch and LAN cables from the CPU units.

• Exchange terminals (ET) - connect E1 or T1 transmission systems to the GSW2KB-A.

• SDH/SONET exchange terminals (SET) - connect synchronous digital hierarchy network to the GSW2KB-A. Four SETs (two transmission protected SET pairs) are located on one ETS2 plug-in unit (that is, STMU functional unit in software).

• Ethernet exchange terminal (EET) - represents functional unit of a physical GigE Ethernet interface, a port in the front panel of ETIP1-A plug-in unit. EET connects PW traffic to the GSW2KB-A. Two EETs (one transmission protected EET pair) are located on one ETIP1-A plug-in unit (that is, ETIP functional unit in software).

• Clock and synchronisation Unit (CLS) - generates the clock signals for the BSC. • Internal LAN switch for PCU LAN and Internal LAN switch for CPU LAN - to which

LAN interfaces from the packet control units (PCU) and LAN interfaces from the CPUs of BCSUs are connected.

• Transcoder submultiplexer (TCSM) - is a functional unit of Flexi BSC but is located in a separate network element (new generation TCSM3i or old generation TCSM2) . Transcoder submultiplexer is usually installed on MSC site (for further informa-tion,see TCSM user documentation). TCSM3i can also be attached to Flexi BSC in the TCSM3i for combined BSC/TCSM installation option.

For more information on TCSM3i for combined BSC/TCSM installation option, see Overview of Engineering for TCSM3i.

2.3 DX 200 protection principlesThe reliability of the operations in the DX 200 network elements has been ensured by backing up all crucial parts of the system following various protection principles, as described in the following sections.

Protection of the functional unitsDifferent protection techniques are used for backing up different types of functional units. Each unit participating in the switching functions or recording of statistical data is backed up according to the 2N protection principle, that is, by duplication according to the hot-standby or spare-device method. On the other hand, each signalling unit is backed up according to the N+1 or N+1/L principle. The former term means that there is one spare unit available to take over the tasks of a faulty unit; in the latter case, the workload is shared between all devices, and if one malfunctions the other units are able to carry the full load.

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Protecting functional units should be consistent, owing to protection principles. The pro-tection principle applied to each type of functional unit in the network element is given in Functional unit descriptions.

Protection of the power distribution, clock signal distribution and wired alarm col-lection systemsVirtually the entire power distribution chain from the rectifiers and power feed cables to individual pieces of equipment in the cabinets has been duplicated to minimise the risk of downtime due to power failures in the DX 200 equipment or cabling. On one hand, the protection for the power supply from the rectifiers to the cabinets has been achieved by duplicating the power inputs in the cabinets, along with the input cables. On the other hand, the cabinet is equipped with a duplicated power distribution and fuse unit, which allows for feeding the voltages to units backing each other up through two separate dis-tribution lines.

Likewise, the DX 200 network elements have a duplicated clock distribution and alarm collection system. The basic clock signal can be fed to each Flexi BSC network element from up to six inputs, four from other network elements (in the same network or PSTN) and two from external sources.

Ensuring reliability at unit levelAt unit level, the following methods are used to ensure proper operation:

• error correcting RAM in critical parts • parity bit or ECC in read-write memories • parity checks in data transmission • reporting on certain error events in data transactions on the system bus • memory area protection (standard Intel processor capability) • automatic testing of connections • time-out supervision • validity checks for input data on different program levels • vital data (for example, call/event data) in protected memory • continuous supervision of the functioning of processes including restarts, when

required • continuous testing of operations (as background run) in all computer units

Backing up units without nominal protectionSome of the functional units of the network element are described as having no protec-tion at all. These include, for example, the ETs, that is, units which interface the network element to the environment. In fact, these units can also be backed up by ensuring that there is a sufficient number of circuits available in the same direction.

Another way to look at these units is to consider all units of a given type as a pool of resources, with several units available at a time to handle an assignment. A failure in one unit will only reduce the size of the pool but not interrupt the traffic; consequently, protection for the pool as a whole can be ensured simply by reserving some extra capacity for it when dimensioning the capacity of the network element.

Transmission protectionTransmission protection (MSP 1 + 1, protective lines) is provided inside an ETIP1-A plug-in unit or an ETS2 plug-in unit.

DN70590621 15



For ETIP1-A, there are two GigE physical interfaces represented by EET functional units, comprising a protecting Ethernet interface. One interface is the active GigE inter-face and the other is the passive interface.

For ETS2, there are two single mode optical interfaces (STM-1/OC-3 interfaces) repre-sented by SET functional units, comprising a protecting STM-1/OC-3 interface. One interface is the active STM-1/OC-3 interface and the other is the passive interface.

Equipment protectionEquipment protection (MSP 1 + 1 protective units) is provided if two ETIP or STMU units are configured with consecutive indexes. For example, ETIP-0 or STMU-0 and ETIP-1 or STMU-1 comprise a pair of ETIPs or STMUs.

16 DN70590621


Id:0900d805807a6c5eConfidential

Mechanical construction of the Flexi BSC

3 Mechanical construction of the Flexi BSCThe basic mechanical structure of the Flexi BSC network element follows a standard hierarchy:

• cabinets • cartridges • plug-in units • internal cables

The system is easy to install, maintain, and operate. Particular attention has been paid to thermal and interference factors.

3.1 Flexi BSC cabinetsIC209-CThe equipment of the BSCC cabinet of the Flexi BSC network element is installed in a IC209-C cabinet variant.

Standards and recommendations

The IC209-C cabinet has a welded frame structure and it is designed following principles based on IEC, EN, ETSI, UL and Telcordia recommendations, with advanced features in terms of safety, protection against interference, stability, and durability.

The IC209-C meets the EN 60950 and UL 60950 safety requirements, along with the ETSI ETS 300019-1-3, Class 3.1E environmental requirements. The earthquake resis-tance of the cabinets is in accordance with Telcordia GR-63-CORE Zone 4, and the EMC emission and immunity features comply with the EN 300386 and (FCC) CFR 47, Part 15 standards, respectively.

The IC209-C is dimensioned according to ETS 300119-2 standard. The emphasis of the design is on easy transportability and suitability for installations in premises with normal room height. Because of the simple mechanical structure with relatively few compo-nents, the equipment cabinets are easy to assemble and disassemble when necessary.

BSCC cabinet

The IC209-C cabinet consists of the following parts (see also figure Cabinet and its com-ponents in Flexi BSC):

• welded cabinet frame (IC209-C) • power supply connector groups (PSCG3-B) • power distribution fuse units (two PDFU units) • upper air guide (can also be used for running cables from front to rear) • six fan trays for forced cooling (FTRB-A) in S15 first deliveries or four fan trays for

forced cooling (FTRB-A) in S14 first and upgrade deliveries • doors rear and front, left and right (DLH209-B and DRH209-B) • two side plates (SCP) • support rails for cartridge shelves • cartridge shelves • cable supporting shelves • wheels • adjustable feet for permanent installation

DN70590621 17

Engineering for Flexi BSC Mechanical construction of the Flexi BSC


• one RJ45 connector, LC-LC adapter, BNC connector, and D25 connector panel (CPRJ45-A), one cabling panel with grounding outlet (CPGO; to be installed at the site), and one small CPETx connector panel at the cabinet top

• RACP adapter for installing CPETx connector panel at the cabinet top • one cover for cable conduit (COCC)

The IC209-C cabinet is equipped with wheels to facilitate moving at the site. Prior to per-manent installation, the cabinet(s) of Flexi BSC are fitted with adjustable feet and lined up side by side in cabinet rows.

The following figure shows the BSCC cabinet on S14 level.

Figure 3 BSCC cabinet, S14

Indoor cabinet

IC209-C

Power

distribution

and fuse unit

with Dual Line

DC filters

Cover plate for

power supply

Right hand side

door for indoor

cabinet

Side plateorEMC Gasketframe

Cable support

shelf

Horizontal

grounding bar

Left hand side

door for indoor

cabinet

Rail for shelves

Cartridge

Vertical

grounding bar

Cartridge shelf

with place for

fan units

Adjustment feet

Wheel

Cover for wheel box

Power supply

connector group

Air guide

Door grounding cable

Door grounding cable

DN0945545

Cartridge shelf

with place for

fan units

Cartridge shelf

with place for

fan units

18 DN70590621




There were some S14 level BSCC cabinets delivered with IC209-A cabinet.

IC209-AThe equipment of the BSCC cabinet of the Flexi BSC network element is installed in a IC209-A cabinet variant.

Standards and recommendations

The IC209-A cabinet has a welded frame structure and it is designed following principles based on IEC, EN, ETSI, UL and Telcordia recommendations, with advanced features in terms of safety, protection against interference, stability, and durability.

The IC209-A meets the EN 60950 and UL 60950 safety requirements, along with the ETSI ETS 300019-1-3, Class 3.1E environmental requirements. The earthquake resis-tance of the cabinets is in accordance with Telcordia GR-63-CORE Zone 4, and the EMC emission and immunity features comply with the EN 300386 and (FCC) CFR 47, Part 15 standards, respectively.

The IC209-A is dimensioned according to ETS 300119-2 standard. The emphasis of the design is on easy transportability and suitability for installations in premises with normal room height. Because of the simple mechanical structure with relatively few compo-nents, the equipment cabinets are easy to assemble and disassemble when necessary.

NEBS compliance

NEBS stands for network equipment building system that is based on Network Equip-ment Building Standards. It is a set of Telcordia (former Bellcore) standards, whose purpose is to unify hardware requirements and help Telephone companies to evaluate the suitability of products for use in their networks. Compliance to NEBS is usually inquired by RBOC's (Regional Bell Operator Company) in the USA. The DX 200 network element hardware is NEBS Level 3 compliant, covering GR-63-CORE and GR-1089-CORE in Central Office or equivalent premises, as applicable for Type 2 equipment, as specified in GR-1089-CORE.

BSCC cabinet

The IC209-A cabinet consists of the following parts (see also figure Cabinet and its com-ponents in Flexi BSC):

• welded cabinet frame (IC209-A) • power supply connector groups (PSCG3-B) • power distribution fuse units (two PDFU-B units) • upper air guide (can also be used for running cables from front to rear) • four fan trays for forced cooling (FTRB-A) • doors rear and front, left and right (DLH209-B and DRH209-B) • two side plates (SCP) • support rails for cartridge shelves • cartridge shelves • cable supporting shelves • wheels • adjustable feet for permanent installation • one RJ45 connector, LC-LC adapter, BNC connector, and D25 connector panel

(CPRJ45-A), one cabling panel with grounding outlet (CPGO; to be installed at the site), and one small CPETx connector panel at the cabinet top

• RACP adapter for installing CPETx connector panel at the cabinet top • one cover for cable conduit (COCC)

DN70590621 19



The IC209-A cabinet is equipped with wheels to facilitate moving at the site. Prior to per-manent installation, the cabinet(s) of Flexi BSC are fitted with adjustable feet and lined up side by side in cabinet rows.

IC203-A cabling cabinet (CC, optional)The cabling cabinet IC203-A is optional for the Flexi BSC. Its connector panels are used for connecting the external ET cables of the network element to the environment when there are more than 48 external PCM interfaces. The cabling cabinet is installed on the right side of the equipment cabinet, seen from the front.

Three cabling cabinet options are available:

• Cabling cabinet 2 PCMs / cable (connector panels CPETS-G and CPETS-H) • Cabling cabinet 1 PCM / cable (connector panels CPETS-E and CPETS-F) • Cabling cabinet coaxial PCMs (connector panels CPETC-E and CPETC-F)

The IC203-A cabinet consists of the following parts:

• welded cabinet frame (IC203-A) • one small CPETx panel at the cabling cabinet top in the first deliveries • RACP2 adapter for installing a CPETx connector panel at the cabling cabinet top

(S14 first deliveries only) • two large CPETx panels and three small CPETx panels when the cabling cabinet is

used with Flexi BSC or as a BSC-part in the combined BSC/TCSM installation option • doors rear and front (2 × D203-B) • adjustable feet for permanent installation

Either the cabling cabinet IC203-A or the side cable conduit can be used with the equip-ment cabinet.

Side cable conduit (SCC)In equipment rooms with a raised floor, the side cable conduit (SCC) is used with each BSCC cabinet for cabling external cables. The SCC can be installed on either side of the cabinet. See figure Side cable conduit (SCC).

20 DN70590621




Figure 4 Side cable conduit (SCC)

The dimensions of the SCC are (H × W × D) 2000 mm × 600 mm × 75 mm.

3.2 CartridgesIn the design of the cartridges, particular attention has been paid to durability even under demanding conditions, along with dimensioning for optimal use of cabinet space - each cartridge contains the equipment of one or more functional units. In the Flexi BSC, 2 mm hard metric (HM) cartridges are used.

The plug-in units in the 2 mm hard metric cartridges connect to the motherboards of the cartridges through hard metric connectors, which are designed in accordance with the IEC 1076-4-101 standard. Empty plug-in unit slots are covered with dummy panels.

In Flexi BSC S14 first deliveries, the cartridges come in two sizes:

• 1/1-shelf cartridge, comprising types BC1C-B, SGC1C-A • 1/3-shelf cartridge, comprising types DC3C-B, CC3C-B, CC3C-A

DN01195368

DN70590621 21



Figure 5 2 mm hard metric cartridge and the cartridge shelf

3.3 Plug-in unitsThe Flexi BSC is constructed by using a total of 18 plug-in unit types, including the DC/DC converters. The size of these plug-in units is 233 mm x 220 mm.

All plug-in units used in the Flexi BSC are plug-in units in 2 mm hard metric cartridges. They are designed according to advanced construction principles based on the IEEE P1101.10 standard. The 2 mm hard metric cartridge environment sets somewhat stricter requirements for the construction of the hardware than that of a standard computer car-tridge.

For example, the insertion and extraction forces to be managed when installing or removing the plug-in units in 2 mm hard metric cartridges are considerably greater than they are for the 'normal' plug-in units. For a single plug-in unit, the force to be managed may be as high as 400 N, equal to the weight of 41 kilograms. To overcome such forces, the plug-in units in 2 mm hard metric cartridges are equipped with attachment and removal handles at the top and bottom of the front plate for easy installation.

The front panels of the units are made of aluminium or aluzinc plated steel metal. In addition to durability, particular attention has been paid to logical and user-friendly design, with systematical positioning of the LED indicators and switches for easy oper-ation and monitoring of the unit's condition.

As a general rule, connectors for cables entering the equipment in the 2 mm hard metric cartridges are placed on the motherboards of the cartridges; only connectors for service terminals, which are needed only for temporary use, are located on the front panels of the plug-in units.

3.4 CablingThe cabling of a first delivery Flexi BSC consists of interconnection cables (that is, intra-cabinet and intercabinet) cables and external cables.

The intracabinet cables comprise all the cables inside the cabinet and between the cabinet and cabling cabinet. They are cut to length and equipped with connectors.

M4 x 10

DN9836707

22 DN70590621




The intercabinet cables comprise cables between the BSC-part and the TCSM3i-part in the combined BSC/TCSM installation option.

The external cables include:

• E1/T1 cables • external alarm cables • power supply cables • grounding cables • I/O cables • LAN/Ethernet cables • STM-1/OC-3 cables

The general cabling principles for the Flexi BSC are the following:

• Intracabinet cables connect plug-in units located inside the same cabinet. • Most intracabinet cables are equipped on the left side of the cabinet, viewed from

the back. There are some exceptions, such as power supply cables, PCM cables going to group switches (1 and 0) and cables connecting plug-in units located on the same shelf.

• Intracabinet cables may also include cables that are connected either on the other cable end or on both cable ends to the front panels of the plug-in units. These types of cables can be equipped on either left and/or right side of the cabinet. Other cable end can also be on the other side of the cabinet.

• All cables except power cables, GigE cables from the ETIPs and STM-1/OC-3 cables entering the Flexi BSC cabinets are grounded at the CPGO cabling panels with grounding outlets, or CPRJ45-A, or small CPETx connector panels at the cabinet top or at the small CPETx and large CPETx connector panels in the cabling cabinet.

DN70590621 23

Engineering for Flexi BSC Flexi BSC cabinet configuration and capacity

Id:0900d805807a7ae0Confidential

4 Flexi BSC cabinet configuration and capacityThis section describes the dimensions and configurations of the BSCC cabinet and an optional cabling cabinet in Flexi BSC first deliveries.

4.1 Cabinet descriptionsThe S14 first-delivery Flexi BSC features an equipment cabinet (BSCC) and an optional cabling cabinet (CC). The equipment configurations are described in more detail in the following sections.

The BSCC cabinet has fixed cartridge configuration. Although it may be only partially equipped, if the operator does not need to utilise the full Flexi BSC capacity, each car-tridge in the cabinet accepts a functional unit of only certain type. All cartridges are installed in the cabinets at the factory.

The cabling cabinet contains five connector panels that are installed in the cabling cabinet at the factory.

4.1.1 CabinetsThe dimensions of the BSCC cabinet (IC209-C or IC209-A) are (H × W × D) 2000 mm × 900 mm × 600 mm. The depth of the cabinet doors is included in the depth measure. When installed, the cabinet stands on approximately 50-mm-high adjustable feet or rails.

The dimensions of the cabling cabinet (IC203-A) are (H × W × D) 2000 mm × 300 × 600 mm. The depth of the cabinet doors is included in the depth measure. When installed, the cabinet stands on approximately 50-mm-high adjustable feet or rails.

Above the cabinet row, a free space of at least 500 mm is required to ensure efficient ventilation.

For more information on the row layout of the cabinets, see Equipment room layout.

4.1.2 Functional unit configuration of the cabinets

Functional unit configuration of the BSCC cabinet in Flexi BSCThe S14 first-delivery Flexi BSC features one BSCC cabinet that contains, among other units, the functional units which handle the key operation and maintenance tasks in the BSC3i. The maximum configuration is:

• two power distribution fuse units (PDFU-B) • four fan trays (FTRB-A) for forced ventilation in IC209-A cabinet, six fan trays

(FTRB-A in IC209-C cabinet • two bit group switches (GSW2KB-A) installed in SGC1C-A cartridges • two GTIC units installed in SGC1C-A cartridges • four ETC units installed in SGC1C-A cartridges • two clock system units (CLS) installed in SGC1C-A cartridges • one station controller signalling unit with packet control units (BCSU 0 ) installed in

CC3C-B cartridge and six BCSUs installed in BC1C-B cartridges • two marker and cellular management units (MCMU) installed in the DC3C-B car-

tridge

24 DN70590621



Flexi BSC cabinet configuration and capacity

• one operation and maintenance unit (OMU) installed in the CC3C-A cartridge • for internal use, two (2 x 1) EMB LAN swithes (ESB24-D) installed in the DC3C-B

cartridge • for external use, six (2 x 3) LAN switches (ESB24-D) installed in BC1C-B cartridges

Figure Equipping of the BSCC cabinet in Flexi BSC with cabling cabinet on S14 level presents the configuration of the BSCC cabinet with the cabling cabinet. For more detailed information on functional units, see Functional unit descriptions.

Figure 6 Equipping of the BSCC cabinet (IC209-C) in Flexi BSC with optional cabling cabinet on S14 level

BSCC

CPETx

T00

PDFU 0

PDFU-B

FTRB 3FTRB 2

FTRB 5FTRB 4

5

4

3

2

1

00 6

FRONT VIEW

0

GSW2KB-A

0

4 80

BCSU

0OMU

BCSU

3

BCSU

5

0

GTIC

0

ETC

0

ETC

1 CLS

0

GSW2KB-A

1

GTIC

1

ETC

2

ETC

3 CLS

1

0

PDFU 1

PDFU-B

0

BCSU

1

LA

NU

0

BCSU

4

BCSU

6

BCSU

2

LA

NU

1CPRJ45-A

CPGO/

CPETxCPETx

DN0936312

MC

MU

0

MC

MU

1

CPETx

CPETx

CPETx

CPETx

CPETx

CPETx

FTRB 1FTRB 0

ETC

2

DN70590621 25



Figure 7 Equipping of the BSCC cabinet (IC209-A) in Flexi BSC with cabling cabinet on S14 level

4.1.3 Panels

CPRJ45-A, small CPETx, and CPGO at the BSCC cabinet topAt the BSCC cabinet top, there are three holes for the following connector panels: CPRJ45-A, small CPETx panels installed using RAPC roof adapter, and CPGO. The CPRJ45-A is installed in the middle, the CPGO on the right-hand side, and the small CPETx on the left-hand side, seen from the front.

CPRJ45-A and the small CPETx connector panel are installed at the factory but the CPGO panel is always installed on site.

The CPRJ45-A panel is used for providing external LAN connections, serial connec-tions, external synchronisation input connections and external alarm connections.

PDFU 0PDFU-B

DN70590321

FTRB 1FTRB 0

FTRB 3FTRB 2

5

4

3

2

1

00 6

FRONT VIEW

30

GSW2KB-A

0

96

4 80

BCSU

0OMU

BCSU

3

BCSU

5

0 4 96

4

0

CPETx

GTIC

0

ETC

0

ETC

1 CL

S0

GSW2KB-A

1

GTIC

1

ETC

2

ETC

3 CL

S1

30 96

PDFU 1PDFU-B

6

MC

MU

0

MC

MU

1

CPETx

CPETx

1

2

3

CPETx

CPETx

0 4 96

BCSU

1

LA

NU

0

BCSU

4

BCSU

6

BCSU

2

LA

NU

1

BSCC

CPRJ45-ACPGO/

CPETxCPETx CPETx

26 DN70590621



Flexi BSC cabinet configuration and capacity

The CPETS-G, CPETS-E or CPETC-E panels are used for ET connections. CPETS-G and CPETS-E provide connections with RJ45 connectors. CPETS-G provides two external PCMs from one RJ45 connector, which reduces site cabling by half compared to CPETS-E. CPETS-E provides only one external PCM from one RJ45 connector and fulfils all line protection requirements in ANSI environment. CPETC-E provides connec-tion with coaxial connectors.

The CPGO connector panel with grounding outlet is used for external single-mode cabling and for GigE Ethernet cabling (copper GigE Ethernet or multimode optical GigE Ethernet). The cabling from the ETS2 plug-in units is routed from the ETS2 front panels (SFPS1L modules) to the rear side of the cabinet using the holes on the cartridge shelves 1 and 3 or the hole in the upper air guide of the cabinet and then at the rear of the cabinet through the CPGO, and to the operator's network.

Connector panels in the optional cabling cabinetThe cabling cabinet is needed whenever the number of external E1/T1 PCM interfaces in use exceeds 48.

The connector panels in the cabling cabinet come in two sizes. The small CPETx panels (CPETS-G, CPETS-E, and CPETC-F) are used for 48 PCMs, and the large CPETx panels (CPETS-H, CPETS-F, and CPETC-F) are used for 256 PCMs.

In S14 first deliveries, an additional small CPETx connector panel is installed at the cabling cabinet top using RAPC2 roof adapter.

4.1.4 Other items

Cover for cable conduit (COCC)The cover for cable conduit (COCC) is used in the BSCC cabinet to protect and section out the power supply equipment.

Power distribution fuse unit (PDFU-B)To ensure 2N protection for the power distribution lines, the BSCC cabinet is provided with two power distribution fuse units (PDFU-B) located at the top of the cabinet, above the top shelf. Each PDFU-B forms an independent feeding input branches consisting of circuit breakers, diodes, filters, and fuses.

Fan tray (FTRB-A and FTRB)To ensure forced cooling, the BSCC cabinet is equipped with four (IC209-A) or six (IC209-C) fan trays (FTRB-A), each of which contains five fans. The FTRB-As are located in pairs above shelves 3 and 5 (IC209-A) or above shelves 2, 3 and 5 (IC209-C).

Cover plate (COP4T) and shim plates (SHIM16T, SHIM4T)The IC209-A and IC209-C cabinets are designed to use forced cooling. To achieve suf-ficient cooling capacity and upward air flow, the non-equipped BCSU units and/or indi-vidual plug-in unit slots are covered with cover plates (COP4T) or shim plates (SHIM16T, SHIM4T).

4.2 TCSM3i for combined BSC/TCSM installation optionThe TCSM-part of the combined BSC/TCSM installation option is a third-generation transcoder submultiplexer (TCSM3i). It is mounted to the first-delivery Flexi BSC on BSC site. Up to three TCSA cabinets can be attached to BSCC cabinet (TCSA 0, TCSA

DN70590621 27



1 and TCSA 2). For more information on TCSM3i for combined BSC/TCSM installation option, see the separate document Engineering for TCSM3i.

28 DN70590621


Id:0900d80580476079Confidential

Functional unit descriptions for the Flexi BSC

5 Functional unit descriptions for the Flexi BSCThe functional unit types of the Flexi BSC are described in the following sections. Each description includes the information on the basic configuration of the functional unit and the expansion possibilities, if such exist. The descriptions are presented in alphabetical order except for the PDFU, which is presented last.

The following functional units are used in the first-delivery Flexi BSC:

• Bit group switch (GSW2KB-A) in the Flexi BSC • BSC signalling unit (BCSU) in the Flexi BSC • Clock system (CLS) in the Flexi BSC • Ethernet-based message bus (EMB) in the Flexi BSC • ETIP and EET units in the Flexi BSC • Exchange Terminal (ET) in the Flexi BSC • IP interfaces in the Flexi BSC • Marker and cellular management unit (MCMU) in the Flexi BSC • Operation and maintenance unit (OMU) in the Flexi BSC • STMU and SET in the Flexi BSC • Power distribution fuse unit (PDFU) in the Flexi BSC

General configuration rulesThere are some general rules in configuring the Flexi BSC:

• Shim plates are used for covering empty slots in each computer cartridge and cover plates are used to cover empty BCSU units.

• Memory modules are installed into the central processor unit (CPU). Depending on memory requirements, the type of memory module and the number of modules needed is selected (1x1GB, 2x512 MB, 512 MB).

• Configuration of the functional units must be done according protection principles.

5.1 Bit group switch (GSW2KB-A) in the Flexi BSC

Purpose: The duplicated 2048 PCM bit group switch is the switching fabric of the Flexi BSC.

The GSW2KB-A is housed in two identical parts of two SGC1C-A cartridges. It conveys the traffic passing through the Flexi BSC and switches the tones to the sub-scribers and to the trunk circuits. It also establishes the needed connections to the signalling units and the internal data transmission channels, and is responsible for the submultiplexing functions of the Flexi BSC.

The operation of the GSW2KB-A is controlled and supervised by the marker and cellular management unit (MCMU; two SWPRO-Cs).

Protection: 2N with MCMU

Type: Functional unit, subunit of the marker and cellular management unit

Plug-in units: SW256B Switching matrix plug-in unit for 256 PCM lines

Interfaces: Switch control bus from the marker and cellular management unit

4 or 8 Mbit/s internal PCM lines

HotLink interface

DN70590621 29

Engineering for Flexi BSC Functional unit descriptions for the Flexi BSC


Because of protection requirements, the Flexi BSC contains always two GSW2KB-A units (0 and 1) housed in two different SGC1C-A cartridges. The GSW2KB-A equipment includes eight SW256B switching units but no power supply plug-in units, because the SW256B has a built-in power supply. The basic configuration is shown in figure GSW2KB-A equipment in the SGC1C-A cartridge and table Plug-in units of the GSW2KB-A in SGC1C-A cartridge.

Figure 8 GSW2KB-A equipment in the SGC1C-A cartridge

5.2 BSC signalling unit (BCSU) in the Flexi BSC

Support

mechanic

4T

Support

mechanic

4T

ET

16

Support

mechanic

5T

CL3T

G

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

Support

mechanic

4T

SW

25

6B

7

SW

25

6B

6

SW

256B

5

SW

25

6B

4

SW

25

6B

3

SW

256B

2

SW

25

6B

1

SW

25

6B

0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 33 34 35 36 37 38 3931

GSW2KB-A 0 or

GSW2KB-A 1 GTIC 0 or GTIC 1 ETC 0 or ETC 2

CLS 0 or

CLS 1ETC 1 or ETC 3

DN70590345

Slot Name Function

F01 SW256B Switching Network (8 kbit/s channels)








Table 2 GSW2KB-A equipment in the SGC1C-A cartridge

Purpose: The BCSU handles those functions of the BSC which are highly dependent on the amount of traffic. It controls the signalling and traffic on both A interface and Abis inter-face and provides access to the GPRS core network (optional feature).

Protection: N+1

Type: Computer unit with no subunits

Number of BCSUs and packet control units:

S14 Flexi BSC: 1 (BCSU 0) + 6 (BCSU 1-6)

Packet control units: 5 (BCSU 0) + 30 (BCSU 1-6) in first deliveries

Both Frame relay (FR) connections and IP-based Gb interface connections to SGSN direction are available for packet control units PCU2-E (in first deliveries) and PCU2-D (in upgrade deliveries).

30 DN70590621




In S14 first deliveries, the equipment of BCSU 0 is installed in a CC3C-B cartridge and the equipment of BCSU 1-6 is installed in BC1C-B cartridges.

The basic configuration includes the plug-in units of BCSU 0 is shown in figure BCSU 0 equipment in the CC3C-B cartridge and in the following table.

Figure 9 BCSU 0 equipment in the CC3C-B cartridge

Plug-in units: PSC6-D Power supply for cartridge

AS7-D Preprocessor (CCS7; LAPD)

PCU2-E PCU2 plug-in unit in first deliveries

CP816-AC Central processor unit in first deliveries

Interfaces: Ethernet message bus (EMB) interface

GSW2KB-A

LAPD

CCS7

LAN

Group switch in first deliveries

Slot Name Function Note

F1 PSC6-D Power Supply

F2 SHIM4T Front panel with shim plate 1)

F3

SHIM4T/

PCU2-E

Front panel with shim plate /

PCU2 1)

F4

SHIM4T/

PCU2-E


PCU2 1)

F5

SHIM4T/

PCU2-E


PCU2 1)

Table 3 BCSU 0 equipment in the CC3C-B cartridge

1 106 9873 4 52

OPR

OFF

ON

PS

C6

0

DBG

RST

J7

J6

CP

81

60

WO RUN P0 P1

LFTE P2 P3

RUN

PC

U2

12

RUN

PC

U2

4

RUN

PC

U2

6

RUN

PC

U2

8

RUN

PC

U2

10

SH

IM4T

AP

J8

AP

J8

AS

713

AS

714

DN70581393

DN70590621 31



The basic configuration includes the plug-in units of BCSU 1 - BCSU 6 is shown in figure BCSU 1 - BCSU 6 equipment in the BC1C-B cartridge and in the following table.

Figure 10 BCSU 1 - BCSU 6 equipment in the BC1C-B cartridge

F6

SHIM4T/

PCU2-E


PCU2 1)

F7

SHIM4T/

PCU2-E


PCU2 1)

F8 AS7-D CCS7 and LAPD

F9 AS7-D LAPD

F10 CP816-AC Central processor 2)

F10

2 x MRD512A /

2 x MRD512B /

1 x MRD1GBA /

1 x MRD1GBB Memory for central processor

1 GB memory

3)

Notes

1) If no PCU2-E is equipped, SHIM4T is left equipped in this slot.

2) Two interfaces for CPU LAN and two for EMB.

3)

MRD512A/MRD512B

To memory banks J14 and J13 when Radisys CPU is used, and to memory banks A2 and B2 when Advantech CPU is used. Dual channel memory mode is used in both cases.

MRD1GBA/MRD1GBB

To memory bank J14 when Radisys CPU is used, and to memory banks A2 when Advantech CPU is used.


Table 3 BCSU 0 equipment in the CC3C-B cartridge (Cont.)

OPR

OFF

ON

PS

C6

0

DBG

RST

J7

J6

CP

816

0

WO RUN P0 P1

LFTE P2 P3

RUN RUN RUNRUN RUN

AP

J8

AP

J8

AS

713

AS

714

PC

U2

8

PC

U2

10

PC

U2

12

PC

U2

4

PC

U2

6

BCSU 1 or BCSU 2

LANU 0 or

LANU 1 BCSU 3 or BCSU 4 BCSU 5 or BCSU 6

DN70581303

Support

mechanic

5T

MG

T1

RST

OPR

SE

R1

ET

H1

ET

H2

ET

H2

3E

TH

24

ES

B24

0

MG

T1

RST

OPR

SE

R1

ET

H1

ET

H2

ET

H2

3E

TH

24

MG

T1

RST

OPR

SE

R1

ET

H1

ET

H2

ET

H2

3E

TH

24

ES

B24

1

ES

B2

42

SH

IM4T

PS

C6

0

OPR

OFF

ON

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

OPR

OFF

ON

PS

C6

0

DBG

RST

J7

J6

CP

816

0

WO RUN P0 P1

LFTE P2 P3

RUN RUN RUNRUN RUN

AP

J8

AP

J8

AS

713

AS

714

PC

U2

8

PC

U2

10

PC

U2

12

PC

U2

4

PC

U2

6

OPR

OFF

ON

PS

C6

0

DBG

RST

J7

J6

CP

816

0

WO RUN P0 P1

LFTE P2 P3

RUN RUN RUNRUN RUN

AP

J8

AP

J8

AS

713

AS

714

PC

U2

8

PC

U2

10

PC

U2

12

PC

U2

4

PC

U2

6

19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

32 DN70590621




Slot Name Function Notes

BCSU 1 or BCSU 2

F1 PSC6-D Power Supply Notes

F2

SHIM4T/

PCU2-E


PCU2 1)

F3

SHIM4T/

PCU2-E


PCU2 1)

F4

SHIM4T/

PCU2-E


PCU2 1)

F5

SHIM4T/

PCU2-E


PCU2 1)

F6

SHIM4T/

PCU2-E


PCU2 1)

F7 AS7-D CCS7 & LAPD

F8 AS7-D LAPD

F9 + F10 CP816-AC Central processor 2)

F9 + F10

2 x MRD512A /

2 x MRD512B /

1 x MRD1GBA /


1 GB memory

3)

BCSU 3 or BCSU 4


F18

SHIM4T/

PCU2-E


PCU2 1)

F19

SHIM4T/

PCU2-E


PCU2 1)

F20

SHIM4T/

PCU2-E


PCU2 1)

F21

SHIM4T/

PCU2-E


PCU2 1)

F22

SHIM4T/

PCU2-E


PCU2 1)


F24 AS7-D LAPD


Table 4 BCSU 1 - BCSU 6 equipment in the BC1C-B cartridge

DN70590621 33



F25 + F26

2 x MRD512A /

2 x MRD512B /

1 x MRD1GBA /


1 GB memory

3)

BCSU 5 or BCSU 6


F28

SHIM4T/

PCU2-E


PCU2 1)

F29

SHIM4T/

PCU2-E


PCU2 1)

F30

SHIM4T/

PCU2-E


PCU2 1)

F31

SHIM4T/

PCU2-E


PCU2 1)

F32

SHIM4T/

PCU2-E


PCU2 1)


F34 AS7-D LAPD


F35 + F36

2 x MRD512A /

2 x MRD512B /

1 x MRD1GBA /


1 GB memory

3)

Notes

1) If no PCU2-E is equipped, SHIM4T is left equipped in this slot.

2) Two interfaces for CPU LAN and two for EMB.

3)

MRD512A/MRD512B


MRD1GBA/MRD1GBB



Table 4 BCSU 1 - BCSU 6 equipment in the BC1C-B cartridge (Cont.)

34 DN70590621




5.3 Clock system (CLS) in the Flexi BSC

CLS in the first-delivery Flexi BSCIn Flexi BSC, CLS is housed in two identical parts of the SGC1C-A cartridges. A new variant of CL3TG, the CLTG3-UA is introduced in S14 deliveries.

The basic configuration is illustrated in figure Clock and Synchronisation Unit (CLS) in SGC1C-A cartridge and table Plug-in units of the CLS in SGC1C-A cartridge.

Figure 11 Clock and Synchronisation Unit (CLS) in SGC1C-A cartridge

Purpose: The CLS generates the clock signals necessary for the Flexi BSC. The oscillator of the CLS is normally synchronised to an external source, usually an MSC, through a PCM line. Up to two additional PCM inputs are provided for protection.

Protection: 2N

Type: Functional unit with no subunits

Number of CLS units: 2 as one CL3TG-UA plug-in unit contains one entire CLS unit

Plug-in units: CL3TG-UA Clock and synchronisation unit

Interfaces: Synchronisation input

Synchronisation output

External synchronisation input

Wired alarm interface to OMU

Support

mechanic

4T

Support

mechanic

4T

ET

16

Support

mechanic

5T

CL3T

G

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

Support

mechanic

4T

SW

25

6B

7

SW

25

6B

6

SW

256B

5

SW

25

6B

4

SW

25

6B

3

SW

256B

2

SW

25

6B

1

SW

25

6B

0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 33 34 35 36 37 38 3931

GSW2KB-A 0 or


CLS 0 or

CLS 1ETC 1 or ETC 3

DN70590345


F38 + F39 CL3TG-UA CLS 0 or CLS 1

1)

2)

Notes

1) The Clock and Synchronisation Unit (CLS) pair (CLS 0 and CLS 1; equipped in different SGC1C-A cartridges) requires only one 2 Mbit/s circuit.

2) One CL3TG-UA plug-in unit contains one entire CLS unit.

Table 5 Clock and Synchronisation Unit (CLS) in SGC1C-A cartridge

DN70590621 35



Performance characteristics of CL3TG-UAIn the plesiochronous operation mode, the frequency shift of the CL3TG-UA is 2 x 10-8 within each 24-hour period, if the temperature of the environment does not vary.

Number of synchronisation inputs:

• four from PCM lines • two external inputs (120 ohm balanced / 75 ohm unbalanced) / one external input

(120 ohm balanced / 75 ohm unbalanced)

5.4 Ethernet-based message bus (EMB) in the Flexi BSC

The EMB is a message bus designed for the DX 200 network elements and uses a switched LAN.

The plug-in unit used for the cabinet-level EMB LAN switching unit is ESB24-D. The ESB24-Ds for EMB are installed in the MCMU. All computers can be connected to one ESB24-D pair.

The plug-in unit required for the central processor unit is CP816-AC in first deliveries (BCSU, MCMU and OMU), with four Ethernet ports. EMB-specific address modules are installed in the processor units.

All connectors are full duplex. The speed of the links between computers and cabinet-level EMB LAN switching units is 1000 Mbps. To achieve protection, EMB LAN hardware is duplicated.

5.5 ETIP and EET units in the S14 Flexi BSC first deliveriesIn S14 first deliveries, Exchange Terminal for IP Transmission (ETIP1-A) is represented by two functional units, Exchange terminal for IP transmission unit (ETIP) and Ethernet Exchange Terminal unit (EET).

Purpose: The EMB is the physical connection between the computer units of the network element.

Protection: 2N


Plug-in Units In MCMU, ESB24-D in first deliveries and in upgrade deliveries

Interfaces: CP816-AC in BCSU, MCMU and OMU in first deliveries

Purpose: ETIP represents a functional unit of ETIP1-A plug-in unit, and EET represents functional unit of a physical GigE Ethernet interface, that is, a port in ETIP1-A plug-in unit

Protection: Transmission protection

2N when equipment protection is used

Type: Functional unit without subunit

Plug-in units: ETIP1-A Exchange Terminal for IP Transmission variant A

36 DN70590621




The following figure shows ETIP1-A Exchange Terminal for IP Transmission in GTIC parts (GTIC 0 and GTIC 1) of SGC1C-A cartridges.

Figure 12 ETIP1-A Exchange Terminal for IP Transmission in GTIC parts (GTIC 0 and GTIC 1) of SGC1C-A cartridges

The following table presents the GTIC 0 and GTIC 1 parts when transmission protection is in use.

Interfaces: Hotlink interface to GSW2KB-A

GigE Ethernet (Ethernet/ IP)

Control interface from a signalling unit (through GSW2KB-A), four time-slots on control PCM

Synchronisation

SFP Single-Mode LC Optical Transceiver Modules, SFPF2L (for ETIP1-A as 1000Base-Sx interfaces; LC connectors)

SFP Transceiver Copper Short Range, RJ45 Connector Modules, SFPCSL (for ETIP1-A as 10/100/1000Base-T, RJ45 interface)

Su

pp

ort

me

ch

an

ic4

T

Su

pp

ort

me

ch

an

ic4

T

ET

16

Su

pp

ort

me

ch

an

ic5

T

CL3T

G

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

IP1

Su

pp

ort

me

ch

an

ic4

T

SW

25

6B

7

SW

25

6B

6

SW

25

6B

5

SW

25

6B

4

SW

25

6B

3

SW

256B

2

SW

25

6B

1

SW

25

6B

0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 33 34 35 36 37 38 3931

GSW2KB-A 0 or


CLS 0 or

CLS 1ETC 1 or ETC 3

ET

IP1

ET

IP1

ET

IP1

Su

pp

ort

me

ch

an

ic4

T

Su

pp

ort

me

ch

an

ic4

T

ET

16

Su

pp

ort

me

ch

an

ic5

T

CL3T

G

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

IP1

Su

pp

ort

me

ch

an

ic4

T

SW

25

6B

7

SW

25

6B

6

SW

25

6B

5

SW

25

6B

4

SW

25

6B

3

SW

256B

2

SW

25

6B

1

SW

25

6B

0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 33 34 35 36 37 38 3931

GSW2KB-A 0 or


CLS 0 or

CLS 1ETC 1 or ETC 3

ET

IP1

ET

IP1

ET

IP1

ET

IP1

ET

IP1

ET

IP1

ET

IP1

SH

IM4

T

SH

IM4

T

SH

IM4

T

SH

IM4

T

DN70643791

DN70590621 37



The following table presents the GTIC 0 and GTIC 1 parts when equipment protection is in use.


F10

SHIM4T/

ETIP1-A


Exchange Terminal for IP Transmission 1)

F11

SHIM4T/

ETIP1-A



F12

SHIM4T/

ETIP1-A



F13

SHIM4T/

ETIP1-A



F14 SHIM4T Front panel with shim plate




Note

1) If no ETIP1-A is equipped, SHIM4T is left equipped in this slot.

Table 6 SGC1C-A cartridge (GTIC 0 and GTIC 1), maximum ET connectivity is in use (both Hotlink pairs are cabled) per ETIP1-A plug-in unit

Slot Name Funtion Notes

F10

SHIM4T/

ETIP1-A



F11

SHIM4T/

ETIP1-A



F12

SHIM4T/

ETIP1-A



F13

SHIM4T/

ETIP1-A



F14

SHIM4T/

ETIP1-A



F15

SHIM4T/

ETIP1-A



F16

SHIM4T/

ETIP1-A



F17

SHIM4T/

ETIP1-A



Table 7 GTIC 0 and GTIC 1, active and standby EET units are on different ETIP1-A plug-in units (active EET on active ETIP1-A and standby EET on protect-ing ETIP1-A)

38 DN70590621




Mixed plug-in unit configurations are also possible in the GTIC 0 and GTIC 1; for example:

• ETS2 and ET16 • ETIP1-A and ET16 • ETIP1-A and ETS2 • ETIP1-A and ET16 and ETS2

Transmission protectionThe default protection method for ETIP and EET units is transmission protection.

Only even indexes are used for ETIP. The number of ETIP units with transmission pro-tection is 0-8 (can be increased in steps of one unit at a time). Maximum ET connectivity is in use (in other words, both Hotlink pairs are cabled) per ETIP1-A plug-in unit.

The number of EET units can be 0-16 (can be increased in steps of one unit at a time). Maximum ET connectivity is in use (both Hotlink pairs are cabled) per ETIP1-A plug-in unit.

The following table shows ETIP indexes, EET and ET numbers and Control PCMs in GTIC 0 and GTIC 1 parts of SGC1C-A cartridges with transmission protection - both Hotlink pairs are cabled per ETIP1-A plug-in unit.

Notes

1) If no ETIP1-A is equipped, SHIM4T is left equipped in this slot.

Slot Name Funtion Notes

Table 7 GTIC 0 and GTIC 1, active and standby EET units are on different ETIP1-A plug-in units (active EET on active ETIP1-A and standby EET on protect-ing ETIP1-A) (Cont.)

Slot GbE interface

ETIP index

EET number

ET number / ETSI *)

ET number / ANSI *)

Control PCM (TSLs)

GTIC 0

10 0 0 0

64…126

192…254

2048…2131

2132…2215 392 (0-3)

1 0 1

64…126

192…254

2048…2131

2132…2215 392 (0-3)

11 0 2 4

1536…1598

1600…1662

2216…2299

2300…2383 392 (16-19)

1 2 5

1536…1598

1600…1662

2216…2299

2300…2383 392 (16-19)

12 0 4 8

1792…1854

1856…1918

2384…2467

2468…2551 393 (0-3)

1 4 9

1792…1854

1856…1918

2384…2467

2468…2551 393 (0-3)

Table 8 ETIP indexes, EET and ET numbers and Control PCMs in GTIC 0 and GTIC 1 parts of SGC1C-A cartridges when transmission protection is in use and both Hotlink pairs are cabled

DN70590621 39



Equipment protectionEquipment protection is an optional protection method for ETIP and EET units. Equip-ment protection is applied to each protecting pair (eight pairs altogether) separately, and has to be ordered as separate sets.

In equipment protection, a maximum of eight ETIP1-A plug-in units are equipped to both GTIC parts (the GTIC parts are powered by different PDFU-Bs and located in different SGC1C-A cartridges) and maximum ET connectivity / Ethernet/IP capacity in use (both Hotlink pairs are cabled) per ETIP1-A plug-in unit. Only the first EET from the ETIP1-A plug-in units is used in equipment protection. The four first active ETIPs are equipped to GTIC 0 slots 10-13 and their protective ETIPs are equipped to GTIC 1 slots 10-13; the last four active ETIPs are equipped to GTIC 1 slots 14-17 and their protecting ETIPs are equipped to GTIC 0 slots 14-17.

Both even and odd indexes are used for ETIP units. The number of ETIP units with equipment protection is 0-16 (that can be increased in steps of one pair at a time).

13 0 6 12

1280…1342

1344…1406

2552…2635

2636…2719 393 (16-19)

1 6 13

1280…1342

1344…1406

2552…2635

2636…2719 393 (16-19)

GTIC 1

10 0 16 32

1920…1982

1984…2046

2720…2803

2804…2887 384 (0-3)

1 16 33

1920…1982

1984…2046

2720…2803

2804…2887 384 (0-3)

11 0 18 36

768…830

832…894

2888…2971

2972…3055 384 (16-19)

1 18 37

768…830

832…894

2888…2971

2972…3055 384 (16-19)

12 0 20 40

1024…1086

1088…1150

3056…3139

3140…3223 385 (0-3)

1 20 41

1024…1086

1088…1150

3056…3139

3140…3223 385 (0-3)

13 0 22 44

512…574

576…638

3224…3307

3308…3391 385 (16-19)

1 22 45

512…574

576…638

3224…3307

3308…3391 385 (16-19)

*) The two PCM number areas in each cell of this column are for the two Hotlinks cabled to certain ETIP: the first PCM number area is for the first Hotlink and the second PCM number area is for the second Hotlink on the ETIP.

Slot GbE interface

ETIP index

EET number

ET number / ETSI *)

ET number / ANSI *)

Control PCM (TSLs)

Table 8 ETIP indexes, EET and ET numbers and Control PCMs in GTIC 0 and GTIC 1 parts of SGC1C-A cartridges when transmission protection is in use and both Hotlink pairs are cabled (Cont.)

40 DN70590621




All EETs have a unique indexes of their own, and only even EET indexes are used. The number of EET units with protection is 0-16 (that can be increased in steps of two units a time, one in the working ETIP and one in the protecting ETIP). Active and standby EET units are equipped on different ETIP1-A plug-in units - active EET on active ETIP1-A and standby EET on protective ETIP1-A.

The following table shows ETIP index, EET and ET numbers and Control PCMs in GTIC 0 and GTIC 1 parts of SGC1C-A cartridges when equipment protection is used.

Slot GbE inter-face

ETIP index EET number

ET numbers / ETSI ET numbers / ANSI Control PCM (TSLs)

10 0 0 0

64…126

192…254

2048…2131

2132…2215 392 (0-3)

11 0 2 4

1536…1598

1600…1662

2216…2299

2300…2383 392 (16-19)

12 0 4 8

1792…1854

1856…1918

2384…2467

2468…2551 393 (0-3)

13 0 6 12

1280…1342

1344…1406

2552…2635

636…2719 393 (16-19)

14 0 9 18

1920…1982

1984…2046

2720…2803

2804…2887 394 (0-3)

15 0 11 22

768…830

832…894

2888…2971

2972…3055 394 (16-19)

16 0 13 26

1024…1086

1088…1150

3056…3139

3140…3223 395 (0-3)

17 0 15 30

512…574

576…638

3224…3307

3308…3391 395 (16-19)

GTIC 1

10 0 1 2

64…126

192…254

2048…2131

2132…2215 384 (0-3)

11 0 3 6

1536…1598

1600…1662

2216…2299

2300…2383 384 (16-19)

12 0 5 10

1792…1854

1856…1918

2384…2467

2468…2551 385 (0-3)

13 0 7 14

1280…1342

1344…1406

2552…2635

2636…2719 385 (16-19)

14 0 8 16

1920…1982

1984…2046

2720…2803

2804…2887 386 (0-3)

15 0 10 20

768…830

832…894

2888…2971

2972…3055 386 (16-19)

Table 9 ETIP index, EET and ET numbers and Control PCMs in GTIC 0 and GTIC 1 parts of SGC1C-A car-tridges when equipment protection is used

DN70590621 41



5.6 Exchange Terminal (ET) in Flexi BSCIn the S14 Flexi BSC, a new 2048 PCM bit group switch (GSW2KB-A) is implemented, and the ET16 plug-in units are installed in a new SGC1C-A cartridge.

The ETs (ET16 plug-in units) of the S14 first delivery Flexi BSC are housed in two SGC1C-A cartridges. SGC1C-A cartridges have three parts where the ET16s can be equipped - two parts with eight slots in each (GTIC 0 or GTIC 1, and ETC0 or ETC 2) and one part with nine slots (ETC 1 or ETC 3).

The Flexi BSC network element is available in two versions: one is for E1 environment (ETSI; transmission rate is 2 Mbit/s) and the other for T1 environment (ANSI; transmis-sion rate is 1.5 Mbit/s). Depending on the operating environment, either balanced or unbalanced cabling and connector panels are needed and an appropriate ET interface type DIP switch (SW1) setting is required on the ET16 plug-in unit.

In E1 environment, the ET16 is used with an ETSI version ET panel (balanced double density panels CPETS-G and CPETS-H with two PCMs in one cable, or balanced

16 0 12 24

1024…1086

1088…1150

3056…3139

3140…3223 387 (0-3)

17 0 14 28

512…574

576…638

3224…3307

3308…3391 387 (16-19)

Slot GbE inter-face

ETIP index EET number

ET numbers / ETSI ET numbers / ANSI Control PCM (TSLs)

Table 9 ETIP index, EET and ET numbers and Control PCMs in GTIC 0 and GTIC 1 parts of SGC1C-A car-tridges when equipment protection is used (Cont.)

Purpose: The ET16 plug-in unit and the ET panel perform the electrical synchronisation and adaptation of an external PCM line. The ET does the HDB3/AMI/B8ZS coding and decoding, inserts the alarm bits in the outgoing direction, and produces the PCM frame structure. The software index number of the ET is that of the Group Switch PCM line.

Protection: None

The number of ET units in S14 Flexi BSC new delivery is 0-800.

To ensure protection for the ET16 plug-in units, it is recommended that the ETs inter-facing PCMs to the same direction are installed in cartridges fed by different PDFU-Bs.


Plug-in units: ET16 Exchange Terminal in ETSI and ANSI environment containing 16 ET functional units

Interfaces: GSW2KB-A (8 Mbit/s mode)

Control interface from a signalling unit (one LAPD timeslot through GSW2KB-A / one ET16 plug-in unit)

External PCM (E1/T1)

Synchronisation

ET panel

42 DN70590621




panels CPETS-E and CPETS-F with one PCM in one cable, or unbalanced panels CPETC-E and CPETC-F).

In T1 environment, the ET16 is used with an ANSI version ET panel (balanced CPETS-E and CPETS-F with one PCM in one cable).

Figure ET16 Exchange Terminal plug-in units in SGC1C-A cartridges shows the maximum configuration of ET16 Exchange Terminal plug-in units in SGC1C-A car-tridges, and table ET16 Exchange Terminal plug-in units in SGC1C-A cartridges shows the plug in units.

Figure 13 ET16 Exchange Terminal plug-in units in SGC1C-A cartridgesS

upport

mechanic

4T

Support

mechanic

4T

ET

16

Support

mechanic

5T

CL3T

G

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

Support

mechanic

4T

SW

25

6B

7

SW

25

6B

6

SW

256B

5

SW

25

6B

4

SW

25

6B

3

SW

256B

2

SW

25

6B

1

SW

25

6B

0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 33 34 35 36 37 38 3931

GSW2KB-A 0 or


CLS 0 or

CLS 1ETC 1 or ETC 3

DN70590345


F10

SHIM4T/

ET16


Exchange terminal

1)

2)

F11

SHIM4T/

ET16


Exchange terminal

1)

2)

F12

SHIM4T/

ET16


Exchange terminal

1)

2)

F13

SHIM4T/

ET16


Exchange terminal

1)

2)

F14

SHIM4T/

ET16


Exchange terminal

1)

2)

F15

SHIM4T/

ET16


Exchange terminal

1)

2)

F16

SHIM4T/

ET16


Exchange terminal

1)

2)

F17

SHIM4T/

ET16


Exchange terminal

1)

2)

Table 10 ET16 plug-in units in SGC1C-A cartridges (GTIC 0 or GTIC 1; ETC 0 or ETC2; ETC 1 or ETC 3)

DN70590621 43



F19

SHIM4T/

ET16


Exchange terminal 1)

F20

SHIM4T/

ET16



F21

SHIM4T/

ET16



F22

SHIM4T/

ET16



F23

SHIM4T/

ET16



F24

SHIM4T/

ET16



F25

SHIM4T/

ET16



F26

SHIM4T/

ET16



F28

SHIM4T/

ET16



F29

SHIM4T/

ET16



F30

SHIM4T/

ET16



F31

SHIM4T/

ET16



F32

SHIM4T/

ET16



F33

SHIM4T/

ET16



F34

SHIM4T/

ET16



F35

SHIM4T/

ET16



F36

SHIM4T/

ET16



Notes

1) If no ET16 is equipped, SHIM4T is left equipped in this slot.


Table 10 ET16 plug-in units in SGC1C-A cartridges (GTIC 0 or GTIC 1; ETC 0 or ETC2; ETC 1 or ETC 3) (Cont.)

44 DN70590621




5.7 IP interfaces in the Flexi BSCThe SWU (switching unit) refers to the various LAN switch equipment used regardless of their physical hardware implementation (ESB24-D in first deliveries).

The SWU provides access to the operator's IP network as a first level LAN switching unit. It provides up-link interfaces to the IP network (router) or to an additional LAN switching unit through the Flexi BSC connector panel. The SWU collects data from the computer and packet controller units and sends it further to external routers and the IP network through 1 Gbit/s or 100 Mbit/s up-link connections. Protecting LAN switching units provide ports of 10/100/1000Base-T/-Tx interfaces with RJ45 connectors and 1000Base-Sx interfaces with LC connectors through the Flexi BSC connector panel.

One LAN SWU pair is dedicated to collecting user-plane traffic from Packet Control Units (PCU) and another to collecting data from computer plug-in units (CPU).

The following figure clarifies the LAN connection principle.

2) Mixed ET16 & ETS2 and ET16 & ETIP1-A and ET16 & ETS2 & ETIP1-A configura-tions are possible in GTIC 0 and GTIC 1


Table 10 ET16 plug-in units in SGC1C-A cartridges (GTIC 0 or GTIC 1; ETC 0 or ETC2; ETC 1 or ETC 3) (Cont.)

Purpose: The integrated LAN switching units are standard in the Flexi BSC first deliveries. The interfaces are composed of two ESB24-D plug-in units (SWU). The LAN interfaces have protecting 100 Mbit/s or 1 Gbit/s uplink connections to the IP network.

Protection: 2N

Type: Functional unit

Plug-in units: ESB24-D LAN switching unit with

• 4 SFP type ports in the front panel (for optical and elec-trical RJ45 transceivers and SFP DA transceivers)

• 20 full duplex Ethernet ports in the back plane (type 10/100/1000Base-T/TX/T)

Interfaces: Uplink interfaces to the IP network (router)

Uplink interfaces to an additional LAN switching unit through the cabling panel for LANs and serial interfaces (CPRJ45-A) in the BSCC cabinet

DN70590621 45



Figure 14 LAN connection principle in the Flexi BSC, S14 release

5.7.1 LAN switching unit (LANU) in the Flexi BSC

In S14-level the Flexi BSC, LANU part is duplicated in two 1/1-shelf BC1C-B cartridges.

The following figure shows LANU part in the Flexi BSC first delivery and the following table shows the plug-in units.

1000BASE-Sx and

1000BASE-T/Tx

Gigabit Ethernets

L2/L3 switch - 0 L2/L3 switch - 1

CPRJ45-A panelCPULAN

PCULAN

SWU-0 SWU-1 SWU-2 SWU-3 SWU-4 SWU-5

Redundancy

LDI

Uplink & LDI

1000BASE-Sx

1000BASE-T/Tx

Corelink

DownlinkDownlinkDownlink

PCUsPCUsCPUs

OSI Router

DN70609117

Purpose: In the BSCC cabinet, LAN switches are used to collect CPU LANs to and from computer units and PCU LANs to and from BCSU cartridges.

In the BSCC cabinet, there are two LANU parts in diffrerent BC1C-B cartridges. LANU 0 and LANU 1 are equipped with three ESB24-D plug-in units and a power unit PSC6-CB.

Protection: 2N


Plug-in units: PSC6-CB Power supply for cartridge in first deliveries

ESB24-D 24-port LAN switch

Interfaces: OMU, and IP network through LAN

46 DN70590621




Figure 15 LANU units in the Flexi BSC new deliveries on S14 level

IP addresses are generated automatically to ESB24-Ds, and therefore LANU units/parts in BC1C-B cartridges are accommodated with two location identification wiring connec-tors (CABIDxy and CARIDxy) to identify the location of the LANU units/parts in the network element.

OPR

OFF

ON

PS

C6

0

DBG

RST

J7

J6

CP

816

0

WO RUN P0 P1

LFTE P2 P3

RUN RUN RUNRUN RUN

AP

J8

AP

J8

AS

713

AS

714

PC

U2

8

PC

U2

10

PC

U2

12

PC

U2

4

PC

U2

6

BCSU 1 or BCSU 2

LANU 0 or

LANU 1 BCSU 3 or BCSU 4 BCSU 5 or BCSU 6

DN70581303

Support

mechanic

5T

MG

T1

RST

OPR

SE

R1

ET

H1

ET

H2

ET

H2

3E

TH

24

ES

B24

0

MG

T1

RST

OPR

SE

R1

ET

H1

ET

H2

ET

H2

3E

TH

24

MG

T1

RST

OPR

SE

R1

ET

H1

ET

H2

ET

H2

3E

TH

24

ES

B24

1

ES

B2

42

SH

IM4T

PS

C6

0

OPR

OFF

ON

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

OPR

OFF

ON

PS

C6

0

DBG

RST

J7

J6

CP

816

0

WO RUN P0 P1

LFTE P2 P3

RUN RUN RUNRUN RUN

AP

J8

AP

J8

AS

713

AS

714

PC

U2

8

PC

U2

10

PC

U2

12

PC

U2

4

PC

U2

6

OPR

OFF

ON

PS

C6

0

DBG

RST

J7

J6

CP

816

0

WO RUN P0 P1

LFTE P2 P3

RUN RUN RUNRUN RUN

AP

J8

AP

J8

AS

713

AS

714

PC

U2

8

PC

U2

10

PC

U2

12

PC

U2

4

PC

U2

6

19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36


F11 PSC6-CB Power Supply

F12

ESB24-D + 2*SFPF2L + 2*SFPCS

24 port LAN switch + SFP FC Trans-ceiver, 2 Gbit/s LC + SFP Tran-ceiver Copper Short Range 1)

F13



F14




Notes

1) CPU LAN

2) PCU LAN

Table 11 Plug-in units in LANU

CABID/CARID BC1C-B cartridge

CABID1A In both BC1C-B cartridges

CARID41

CARID51

BC1C-B cartridge in which LANU 0 is installed

BC1C-B cartridge in which LANU 1is installed

Table 12 Location identification wiring connectors in BC1C-B cartridges

DN70590621 47



5.8 Marker and cellular management unit (MCMU) in Flexi BSC

The Flexi BSC always contains two MCMUs. The MCMU equipment is installed in a DC3C-B cartridge and the basic configuration includes the plug-in units shown in figures MCMU equipment in the DC3C-B cartridge on S14 level and in the following table.

Figure 16 MCMU equipment in the DC3C-B cartridge on S14 level

Purpose: MCMUs control and supervise the GSW2KB-A (in first deliveries) and perform hunting, connecting and releasing of the switching network circuits. The range of the tasks it handles makes up a combination of general marker functions and radio resource man-agement functions.

The MCMU is connected to the other computer units of the network element, OMU and BCSU, through the message bus.

Protection: 2N

Type: Computer unit with no subunits

Plug-in units: PSC6-AB Power supply for the cartridge

ESB24-D 24-port LAN switch

SWPRO-C Switch control processor

CP816-AC Central processor unit


GSW2KB-A in first deliveries

Lb interface

LAN


MCMU 0

F1 PSC6-AB Power supply

Table 13 Plug-in units of the S14 first delivery Flexi BSC MCMU

1 2 5 6 73

SW

PR

O0

OPR

MCMU 0

DBG

RST

J7

J6

CP

81

60

WO RUN P0 P1

LFTE P2 P3

SW

PR

O0

OPR

DBG

RST

J7

J6

CP

81

60

WO RUN P0 P1

LFTE P2 P3

MCMU 1

MG

T1

RST

OPR

SE

R1

ET

H1

ET

H2

ET

H2

3E

TH

24

ES

B2

40

MG

T1

RST

OPR

SE

R1

ET

H1

ET

H2

ET

H2

3E

TH

24

ES

B2

40

OPR

OFF

ON

PS

C6

0

OPR

OFF

ON

PS

C6

0

4 108 9

DN70581412

48 DN70590621




5.9 Operation and maintenance unit (OMU) in the Flexi BSC

F2 ESB24-D 24-port LAN switch 1)

F3 SWPRO-C Switch control processor SCBUS

F4 + F5 CP816-AC Central processor

F4 + F5

2 x MRD512A /

2 x MRD512B /

1 x MRD1GBA /

1 x MRD1GBBMemory for the central pro-cessor

1 GB memory

2)

MCMU 1

F6 PSC6-AB Power supply

F7 ESB24-D 24-port LAN switch 1)

F8 SWPRO-C Switch control processor SCBUS


F9 + F10

2 x MRD512A /

2 x MRD512B /

1 x MRD1GBA /

1 x MRD1GBBMemory for the central pro-cessor

1 GB memory

2)

Notes

1) ESB24-D for EMB.

2)

MRD512A/MRD512B


MRD1GBA/MRD1GBB



Table 13 Plug-in units of the S14 first delivery Flexi BSC MCMU (Cont.)

Purpose: The Operation and Maintenance Unit (OMU) acts as an interface between the user and the Flexi BSC and takes automatic recovery measures on the basis of its collected fault data when required. The tasks of the OMU can be divided into five groups:

• LAN supervision and LAN topology management

• traffic control functions

• maintenance functions

• system configuration administration functions

• system management functions

The OMU has dedicated storage devices, which serve as a storage, for example, for the entire system software of the network element as well as for the event buffer for interme-diate storing of alarms.

Protection: None

DN70590621 49



The network element contains one OMU - thefore there is no protection.

The S14 first delivery OMU is housed in the CC3C-A cartridge. The following figure and table show Operation and Maintenance Unit (OMU) in CC3C-A cartridge.

Figure 17 S14-level Operation and Maintenance Unit (OMU) in CC3C-A cartridge

Type: Computer unit, with a storage device unit as a subunit

Plug-in units: PSC6-AB Power supply for the cartridge

AS7-D Preprocessor

SERO-B Serial interface

HWAT-B Hardware alarm terminal

CP816-AC Central processor unit

DCAR1-A DX 200 carrier for AMC

HDSAM-A AMC carrier for hard disk

HSD07-A SAS hard disk 73 GB

USB Memory stick Memory stick 4 GB


GSW2KB-A in first deliveries

LAN

Wired alarm interface

External alarm interface

Interface to External Alarm Unit (EXAU-A) in first deliveries

Clock control channel

Serial interface (VDU and LPT)

LAPD/Q1

X.25 interface

Memory stick interface

OMU

DN70581424

1 106 9873 4 52

OPR

OFF

ON

PS

C6

0

DBG

RST

J7

J6

CP

816

0

WO RUN P0 P1

LFTE P2 P3

RST

SW0

SW1

HW

AT

0

SE

RO

0

SH

IM4T

AMC1

AMC0

WD

U1

WD

U0

USB0

USB1

AP

J8

AS

70

AP

J8

AS

70

AP

J8

AS

70

50 DN70590621





F1 PSC6-AB Power Supply


F3 AS7-D Q1 / LAPD

F4

SHIM4T/

AS7-D


NMS / dig. X.25

1)

2)

F5

SHIM4T/

AS7-D


NMS / dig. X.25

1)

2)

F6 SERO-B V.11 & V.24 Interface

F7 HWAT-B Hardware Alarm Terminal

F8 + F9

DCAR1-A +

2 x HDSAM-A +

2 x HDS07-A +

1*4334368

DX 200 AMC Carrier 1 +

Hard Disk Carrier AMC +

Hard Disk SAS 73 GB +

4 GB Memory stick

WDU 1, WDU 0

3)


F10 + F11

2 x MRD512A /

2 x MRD512B /

1 x MRD1GBA /


1 GB memory

4)

Notes

1) If no AS7-D is equipped, SHIM4T is left equipped in this slot.

2) One 2 Mbit/s is used together with the other Digital X.25 interface AS7-D in adjacent slot; the other 2 Mbit/s is left unused.

3) DX 200 AMC Carrier allows the use of USB memory stick for loading new soft-ware, for example. The stick replaces MO device that has been used before.

4)

MRD512A/MRD512B


MRD1GBA/MRD1GBB


DN70590621 51



5.10 STMU and SET in Flexi BSC

The STMUs and SETs are housed in GTIC parts of SGC1C-A cartridges. One GTIC part in the SGC1C-A cartridge can contain up to eight ETS2 plug-in units.

The following figure and tables show ETS2 SDH/SONET Exchange Terminal plug-in units in GTIC parts (GTIC 0 and GTIC 1) of SGC1C-A cartridges.

Purpose: The default way is to equip four ETS2 plug-in units to both GTIC cartridges (GTIC car-tridges powered by different PDFU-Bs) and to use both STM-1/OC-3 interfaces (two active and two standby SETs per STM-1/OC-3 interface) of ETS2 plug-in units.

The optical interface from the front panel of the ETS2 plug-in unit is cabled through the CPGO at the cabinet top.

One STMU unit (that is, one ETS2 plug-in unit) has four SETs in use in the default alter-native presented above and in the other alternative one STMU unit (that is, one ETS2 plug-in unit) has two SETs in use.

In optical interface protection, only even STMU indexes are used; either four (by default) or eight (alternative) in both cartridges (GTIC 0 and GTIC 1).

Protection: In S14 first delivery Flexi BSC, transmission protection default method and equipment protection optional method


Plug-in units: ETS2 Exchange Terminal for 2 x STM-1/OC-3

Interfaces: GSW2KB-A - S14 first delivery

Control interface from a signalling unit (through GSW2KB-A) in S14 first delivery

STM-1/OC-3 (SDH/SONET)

Synchronisation

SFP Single-Mode LC Optical Transceiver Modules, SFPS1L

52 DN70590621




Figure 18 ETS2 SDH/SONET Exchange Terminal plug-in units in GTIC parts (GTIC 0 and GTIC 1) of SGC1C-A cartridges

Support

mechanic

4T

Support

mechanic

4T

ET

16

Support

mechanic

5T

CL

3T

G

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

S2

Support

mechanic

4T

SW

25

6B

7

SW

25

6B

6

SW

25

6B

5

SW

25

6B

4

SW

25

6B

3

SW

256B

2

SW

25

6B

1

SW

25

6B

0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 33 34 35 36 37 38 3931

GSW2KB-A 0 or


CLS 0 or

CLS 1ETC 1 or ETC 3

ET

S2

ET

S2

ET

S2

Support

mechanic

4T

Support

mechanic

4T

ET

16

Support

mechanic

5T

CL

3T

G

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

16

ET

S2

Support

mechanic

4T

SW

25

6B

7

SW

25

6B

6

SW

25

6B

5

SW

25

6B

4

SW

25

6B

3

SW

256B

2

SW

25

6B

1

SW

25

6B

0

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 32 33 34 35 36 37 38 3931

GSW2KB-A 0 or


CLS 0 or

CLS 1ETC 1 or ETC 3

ET

S2

ET

S2

ET

S2

ET

S2

ET

S2

ET

S2

ET

S2

SH

IM4

T

SH

IM4

T

SH

IM4

T

SH

IM4

T

DN70643713


F10

SHIM4T/

ETS2


SDH/SONET Exchange terminal 1)

F11

SHIM4T/

ETS2



F12

SHIM4T/

ETS2



F13

SHIM4T/

ETS2





Table 14 SGC1C-A cartridge (GTIC 0 and GTIC 1), two active and two standby SETs in use per ETS2 when transmission protection is used

DN70590621 53



The following table shows GTIC 0 and GTIC 1, active SETs on active ETS2 and standby SETs on protecting ETS2 when equipment protection is used.

Transmission protectionIn S14 Flexi BSC first deliveries, transmission protection is default protection method for STMU and SET.

Only even indexes are used for STMU. The number of STMU units with transmission protection is 0-8 (can be increased in steps of one unit at a time) when both STM-1/OC-3 interfaces are used (that is, both Hotlinks are connected) per ETS2 plug-in unit.

The number of SET units with transmission protection is 0-32 (16 active and 16 standby; can be increased in steps of one unit at a time).



Notes

1) If no ETS2 is equipped, SHIM4T is left equipped in this slot.


F10

SHIM4T/

ETS2



F11

SHIM4T/

ETS2



F12

SHIM4T/

ETS2



F13

SHIM4T/

ETS2



F14

SHIM4T/

ETS2



F15

SHIM4T/

ETS2



F16

SHIM4T/

ETS2



F17

SHIM4T/

ETS2



Notes

1) If no ETS2 is equipped, SHIM4T is left equipped in this slot.

Table 15 GTIC 0 and GTIC 1, active SETs on active ETS2 and standby SETs on protecting ETS2 when equipment protection is used


Table 14 SGC1C-A cartridge (GTIC 0 and GTIC 1), two active and two standby SETs in use per ETS2 when transmission protection is used (Cont.)

54 DN70590621




All SETs have a unique indexes of their own. Both even and odd indexes are used for SETs. The number of SET units with transmission protection is 0-32 (that is, 16 active and 16 standby units; can be increased in steps of one active and one standby unit at a time).

Active and standby SET units are on same ETS2 plug-in units.

In transmission protection, a maximum of four ETS2 plug-in units are equipped to both GTIC parts and both STM-1/OC-3 interfaces (two active SETs and two standby SETs) of ETS2 plug-in units are used (both GTIC parts that are powered by different PDFU-Bs and located in different SGC1C-A cartridges)

The following table shows STMU index, SET and ET numbers and Control PCMs in GTIC 0 and GTIC 1 parts of SGC1C-A cartridges when transmission protection is in use and both STM-1/OC-3 interfaces (two active SETs and two standby SETs; both Hotlink pairs are cabled) of ETS2 plug-in units are used.

Slot STM-1/OC-3 interface of ETS2

Optical interface

STMU index

SET number

ET number / ETSI

ET number / ANSI

Control PCM (TSLs)

GTIC 0

10 0 0 0 0 64…1262048…2131 392 (0-15)

0 1 0 1 64…1262048…2131 392 (0-15)

1 0 0 2 192…2542132…2215 392 (0-15)

1 1 0 3 192…2542132…2215 392 (0-15)

11 0 0 2 81536…1598

2216…2299 392 (16-31)

0 1 2 91536…1598

2216…2299 392 (16-31)

1 0 2 101600…1662

2300…2383 392 (16-31)

1 1 2 111600…1662

2300…2383 392 (16-31)

12 0 0 4 161792…1854

2384…2467 393 (0-15)

0 1 4 171792…1854

2384…2467 393 (0-15)

1 0 4 181856…1918

2468…2551 393 (0-15)

1 1 4 191856…1918

2468…2551 393 (0-15)

Table 16 STMU index, SET and ET numbers and Control PCMs in GTIC 0 and GTIC 1 parts of SGC1C-A car-tridges when transmission protection is in use and both STM-1/OC-3 interfaces (two active SETs and two standby SETs; both Hotlink pairs are cabled) of ETS2 plug-in units are used

DN70590621 55



13 0 0 6 241280…1342

2552…2635 393 (16-31)

0 1 6 251280…1342

2552…2635 393 (16-31)

1 0 6 261344…1406

2636…2719 393 (16-31)

1 1 6 271344…1406

2636…2719 393 (16-31)

GTIC 1

10 0 0 16 641920…1982

2720…2803 384 (0-15)

0 1 16 651920…1982

2720…2803 384 (0-15)

1 0 16 661984…2046

2804…2887 384 (0-15)

1 1 16 671984…2046

2804…2887 384 (0-15)

11 0 0 18 72 768…830 2888…2971 384 (16-31)

0 1 18 73 768…8302888…2971 384 (16-31)

1 0 18 74 832…894 2972…3055 384 (16-31)

1 1 18 75 832…8942972…3055 384 (16-31)

12 0 0 20 801024…1086

3056…3139 385 (0-15)

0 1 20 811024…1086

3056…3139 385 (0-15)

1 0 20 821088…1150

3140…3223 385 (0-15)

1 1 20 831088…1150

3140…3223 385 (0-15)

13 0 0 22 88 512…574 3224…3307 385 (16-31)

0 1 22 89 512…5743224…3307 385 (16-31)

1 0 22 90 576…638 3308…3391 385 (16-31)


Optical interface

STMU index

SET number

ET number / ETSI

ET number / ANSI

Control PCM (TSLs)

Table 16 STMU index, SET and ET numbers and Control PCMs in GTIC 0 and GTIC 1 parts of SGC1C-A car-tridges when transmission protection is in use and both STM-1/OC-3 interfaces (two active SETs and two standby SETs; both Hotlink pairs are cabled) of ETS2 plug-in units are used (Cont.)

56 DN70590621




Mixed plug-in unit configurations are also possible in the GTIC 0 and GTIC 1; for example:

• ETS2 and ETIP1-A ) - transmission protection is in use and maximum STM-1/OC-3 and GigE Ethernet is in use (both Hotlink pairs are cabled) per ETS2 & ETIP1-A plug-in units

• ETS2 and ETIP1-A - equipment protection is in use and active and standby SET & EET units are on different ETS2 and ETIP1-A plug-in units (active EET on active ETIP1-A and active SETs on active ETS2, and standby ETS2 on protecting ETIP1-A and standby SETs on protecting ETS2)

Equipment protectionIn S14 first deliveries, equipment protection is an optional protection method for STMU and SET.

In equipment protection, up to eight ETS2 plug-in units are equipped to both GTIC parts (GTIC 0 and GTIC 1) that are located in different SGC1C-A cartridges and powered by different PDFU-Bs. The ETS2s have two STM-1/OC-3 interfaces each, and both of them are used.

Both even and odd indexes are used for STMU. The number of STMU units with equip-ment protection is 0-16 (that can be increased in steps of one pair at a time).

All SETs have a unique even indexes of their own. The number of SET units with equip-ment protection is 0-32 (that can be increased in steps of two units at a time, one unit in working STMU and one in protecting STMU). Active and standby SET units are equipped on different ETS2 plug-in units - active SET on active ETS2 and standby SET on protecting ETS2.

The following table shows STMU index, SET and ET numbers and Control PCMs in GTIC 0 and GTIC 1 parts of SGC1C-A cartridges when equipment protection is used.

1 1 22 91 576…6383308…3391 385 (16-31)


Optical interface

STMU index

SET number

ET number / ETSI

ET number / ANSI

Control PCM (TSLs)

Table 16 STMU index, SET and ET numbers and Control PCMs in GTIC 0 and GTIC 1 parts of SGC1C-A car-tridges when transmission protection is in use and both STM-1/OC-3 interfaces (two active SETs and two standby SETs; both Hotlink pairs are cabled) of ETS2 plug-in units are used (Cont.)


Optical interface

STMU index

SET number

ET number / ETSI

ET number / ANSI

Control PCM (TSLs)

GTIC 0

10 0 0 0 0 64…1262048…2131 392 (0-15)

Table 17 STMU index, SET and ET numbers and Control PCMs in GTIC 0 and GTIC 1 parts of SGC1C-A car-tridges when equipment protection is used

DN70590621 57



1 0 0 2 192…2542132…2215 392 (0-15)

11 0 0 2 81536…1598

2216…2299 392 (16-31)

1 0 2 101600…1662

2300…2383 392 (16-31)

12 0 0 4 161792…1854

2384…2467 393 (0-15)

1 0 4 181856…1918

2468…2551 393 (0-15)

13 0 0 6 241280…1342

2552…2635 393 (16-31)

1 0 6 261344…1406

2636…2719 393 (16-31)

14 0 0 9 361920…1982

2720…2803 394 (0-15)

1 0 9 381984…2046

2804…2887 394 (0-15)

15 0 0 11 44 768…8302888…2971 394 (16-31)

1 0 11 46 832…8942972…3055 394 (16-31)

16 0 0 13 521024…1086

3056…3139 395 (0-15)

1 0 13 541088…1150

3140…3223 395 (0-15)

17 0 0 15 60 512…5743224…3307 395 (16-31)

1 0 15 62 576…6383308…3391 395 (16-31)

GTIC 1

10 0 0 1 4 64…1262048…2131 384 (0-15)

1 0 1 6 192…2542132…2215 384 (0-15)

11 0 0 3 121536…1598

2216…2299 384 (16-31)

1 0 3 141600…1662

2300…2383 384 (16-31)

12 0 0 5 201792…1854

2384…2467 385 (0-15)


Optical interface

STMU index

SET number

ET number / ETSI

ET number / ANSI

Control PCM (TSLs)

Table 17 STMU index, SET and ET numbers and Control PCMs in GTIC 0 and GTIC 1 parts of SGC1C-A car-tridges when equipment protection is used (Cont.)

58 DN70590621




5.11 Power distribution fuse unit (PDFU) in Flexi BSC

Power distribution fuse unit PDFU-B is in use in S14 deliveries. For information on power supply interfaces in the combined BSC/TCSM installation, see Overview of Engineering for TCSM3i.

To ensure 2N protection for the power distribution lines, the Flexi BSC cabinets are provided with two PDFU-B units, which are located in the upper part of the cabinet and

1 0 5 221856…1918

2468…2551 385 (0-15)

13 0 0 7 281280…1342

2552…2635 385 (16-31)

1 0 7 301344…1406

2636…2719 385 (16-31)

14 0 0 8 321920…1982

2720…2803 386 (0-15)

1 0 8 341984…2046

2804…2887 386 (0-15)

15 0 0 10 40 768…8302888…2971 386 (16-31)

1 0 10 42 832…8942972…3055 386 (16-31)

16 0 0 12 481024…1086

3056…3139 387 (0-15)

1 0 12 501088…1150

3140…3223 387 (0-15)

17 0 0 14 56 512…5743224…3307 387 (16-31)

1 0 14 58 576…6383308…3391 387 (16-31)


Optical interface

STMU index

SET number

ET number / ETSI

ET number / ANSI

Control PCM (TSLs)

Table 17 STMU index, SET and ET numbers and Control PCMs in GTIC 0 and GTIC 1 parts of SGC1C-A car-tridges when equipment protection is used (Cont.)

Purpose: The power distribution fuse unit (PDFU) distributes the -48V/-60V DC power from the site power system to the cartridges through the distribution cables. The PDFU also contains the fuses for these cables, along with alarm circuits for the incoming voltages and its own fuses.

Protection: 2N


Plug-in units: PDFU-B Power distribution fuse unit

Interfaces: Supply interfaces to cartridges and site power system

Wired alarm interface

DN70590621 59



installed at the factory. One PDFU-B contains two independent functional units within one case, A and B. The feed cables are also duplicated.

Each half of the PDFU-B forms an independent feeding input branch consisting of:

• connectors and circuit breakers for the incoming power cables • an integrated filter for EMC protection • connectors for alarm and outgoing power cables • ten fuses for outgoing distribution cables • indicators for blown fuses

The circuit breakers for the incoming power cables have a 30 A rating for PDFU-B and the fuses for the outgoing distribution cables a 10 A rating (use part with manufacturer code 10511 20121).

Figure 19 Two PDFU-B units in the upper part of the BSCC cabinet

Power supply to the cabinetsThe power feed cables from the site power system to the BSCC cabinet in S14 first deliv-eries and BSCC and BSCD cabinets in S14 upgrade deliveries are duplicated (one or two protecting power supply pairs). Each cabinet has supply cables of its own.

Power supply to the cartridgesIn the cabinets, the cartridges housing the functional units back up each other through separate distribution lines. The operating voltages are fed to the cartridges following the principles listed below and illustrated in the following figures.

To ensure 2N protection of the power distribution, the BSCC cabinet in the Flexi BSC is provided with two PDFU-B units.

DN0443376

F10 F11 F12 F13 F14 F15 F16 F17 F18 F19F0 F1 F2 F3 F4 F5 F6 F7 F8 F9

1 0 1 0

-UB 1-UB 0

A

1 0 1 0

-UB 1-UB 0

B

60 DN70590621




On cabinet level, the operating voltages are fed to functional units backing each other up through separate distribution lines, following the principles listed below and illustrated in the figures that follow:

• Some cartridges contain two separate functional entities that have a power supply plug-in unit of its own and are supplied through one of the two PDFU-Bs. In the figures, these types of cartridges are referred to as 'type 1' cartridges. The double computer cartridge DC3C-B is an example of this type.

• Some cartridges are equipped with one power supply plug-in unit that feeds the equipment in the entire cartridge. The protection of the power feed is achieved by supplying functional units backing each other up through one of the two PDFU-Bs. In the figures, these types of cartridges are referred to as 'type 2' cartridges. The CC3C-A and CC3C-B cartridges are examples of this type.

• Some cartridges do not have a power supply plug-in unit but onboard DC/DC con-verters in plug-in units equipped in certain slot areas. SGC1C-A cartridge is an example of this type.In SGC1C-A cartridge, there are eight slots for GSW2KB-A 0/1, eight slots for GTIC 0/1, eight slots for ETC 0/2, and nine slots for ETC 1/3. One PDFU-B supplies the plug-in units in a certain slot area, while the other PDFU-B supplies the plug-in units in another area. In the figures, these types of cartridges are referred to as 'type 3' cartridges.

• Some cartridges have power supply plug-in units for certain slot areas (or functional unit parts of the cartridge). The BC1C-B cartridge is an example of this type.In BC1C-B cartridge, there are nine slots for BCSU 1/2, five slots for LANU 0/1, nine slots for BCSU 3/4, and nine slots for BCSU 5/6. These slot areas are fed by one of the two PDFU-Bs through power supply plug-in units equipped in each particular slot area. In the figures, these types of cartridges are referred to as 'type 4' cartridges.

The following figure shows power distribution in BSCC cabinet of S14 first-delivery Flexi BSC.

DN70590621 61



Figure 20 Power distribution in S14 Flexi BSC

The figure below shows power distribution diagram of the S14 Flexi BSC new delivery cabinet BSCC with two PDFU-Bs fed by two protecting power supply pairs (four 63A fuses). For simplicity, only the negative lead is drawn from the rectifiers to the cartridges.

PDFU 0PDFU-B

FTRB 1FTRB 0

FTRB 3FTRB 2

5

4

3

2

1

00 6

FRONT VIEW

30

GSW2KB-A

0

96

4 80

BCSU

0OMU

BCSU

3

BCSU

5

0 2 4 96

GTIC

0

ETC

0

ETC

1 CLS

0

GSW2KB-A

1

GTIC

1

ETC

2

ETC

3 CL

S1

30 96

PDFU 1PDFU-B

6

0 2 4 96

BCSU

1

LA

NU

0

BCSU

4

BCSU

6

BCSU

2

LA

NU

1

BSCC

CPRJ45-ACPGO/

CPETxCPETx

DN70633708

MC

MU

0

MC

MU

1

62 DN70590621




Figure 21 Power distribution diagram of the S14 Flexi BSC first-delivery cabinet BSCC with two PDFU-Bs fed by two protecting power supply pairs (four 63A fuses)

The following figure below shows power distribution diagram of the S14 Flexi BSC cabinet BSCC with two PDFU-Bs fed by one protecting power supply pair (two 80 A or two 100 A fuses). For the sake of simplicity, only the negative lead is drawn from the rectifiers to the cartridges.

GROUND

BAR OF

THE SITE

DX 200

CABINET

(IC209-B)

RECTIFIERSYSTEMANDBATTERIES

PDFU-B

0

PDFU-B

1

...

~~Input 0 Input 1

~~

~=

~=

TYPE 1

cartridge

TYPE 2

cartridge

TYPE 2

cartridge

=

=

=

=

~~Input 0 Input 1

~~

=

=

=

=

TYPE 3

cartridge

=

=

=

=

TYPE 3

cartridge

=

=

=

=

TYPE 4

cartridge

=

=

=

=

TYPE 4

cartridge

=

=

=

=

DN70634601

DN70590621 63



Figure 22 Power distribution diagram of the S14 Flexi BSC first-delivery cabinet BSCC with two PDFU-Bs fed by one protecting power supply pair (two 80 A or two 100 A fuses)

Supply cables from the rectifiers to the cabinetsFor power supply from the rectifiers, the Flexi BSC cabinet BSCC always has cables of its own.

DX 200

cabinet

(IC209-B)

PDFU-B

0

PDFU-B

1

~~Input 0 Input 1

~~

TYPE 1

cartridge

TYPE 2

cartridge

TYPE 2

cartridge

=

=

=

=

~~Input 0 Input 1

~~

=

=

=

=

TYPE 3

cartridge

=

=

=

=

TYPE 3

cartridge

=

=

=

=

TYPE 4

cartridge

=

=

=

=

TYPE 4

cartridge

=

=

=

=

DN70639562

Ground

bar of

the site

Rectifiersystem andbatteries

~=

~=

64 DN70590621




Figure 23 Power supply to the BSCC cabinet with two PDFU-Bs fed by two protecting power supply pairs (four 63A fuses)

Figure 24 Power supply to the BSCC cabinet with two PDFU-Bs fed by one protecting power supply pair (two 80 A or two 100 A fuses)

Power supply to the fan traysThe Flexi BSC cabinets (BSCC in first deliveries and BSCC and BSCD in upgrade deliv-eries) are equipped with four fan trays (FTRB-A) containing five fans.

Each fan tray is powered by a separate PDFU, see figure Power distribution in S14 Flexi BSC. The fans are N+1/L protecting, meaning that if one of them fails, the remaining fans automatically start to operate at maximum speed, which is enough to provide suf-ficient cooling.

BSCC

= Twin wires

PDFU-B

0

PDFU-B

1

+UB/-UB0

+UB/-UB1

RE

CT

IFIE

RS

/B

AT

TE

RIE

S

~~ ~~ ~~ ~~

DN70637237

+UB/-UB0

+UB/-UB1

BSCC

= Twin wires

PDFU-B

0

PDFU-B

1

+UB/-UB0

+UB/-UB1

RE

CT

IFIE

RS

/B

AT

TE

RIE

S

~~ ~~ ~~ ~~

DN70634567

DN70590621 65

Engineering for Flexi BSC Overview of the installation site


6 Overview of the installation siteThis section describes briefly the equipment room layout and some basic requirements for the premises.

6.1 Equipment room layoutEach cabinet should be located in the equipment room with free space of at least 900 mm (35.4 in.) both at the front and the back, and at least 500 mm (20 in.) between the end of a cabinet row and the wall.

In layout planning, the following aspects should be considered:

• cable structures for the power supply and PCM circuit cables • room for expansion cabinets • room for maintenance between two two-cabinet units with SCCs (when the equip-

ment room has a raised floor) • free space above the cabinet rows (height at least 500 mm, or 20 in.)

The Flexi BSCs are installed in rows with other network elements. Figure Layout princi-ples shows the layout principles for Flexi BSC network elements and TCSM3i.

Figure 25

1800

2700

900

BSCC TCSA 0

1200

TCSA 0 CC

900

BSCC BSCD TCSA 0

TCSM3i stand-alone installation option

Combined BSC/TCSM installation option with BSC3i 2000

Combined BSC/TCSM installation option with Flexi BSC or BSC3i 1000

BSCC TCSA 0 TCSA 1

BSCC TCSA 0 TCSA 1 TCSA 2

CC or SCC not shown

DN70611839

CC or SCC not shown

66 DN70590621



Overview of the installation site

For further information and layout examples, see Overview of a Flexi BSC and TCSM3i installation site in Installation Site requirements for Flexi BSC and TCSM.

6.2 Cable structures and estimated power consumptionFor further information on the cable structures, see Installation Site requirements for Flexi BSC and TCSM.

Cables of peripheral devicesThe connectors for the VDUs and LPTs used for temporary service operations are on the front panels of the CPU plug-in units. The cables connect to RJ45 connectors. The permanent VDU and LPT connections for monitoring the operations of the units are made through the CPRJ45-A connector panels in the BSCC cabinet.

PCM trunk distribution frame (DDF)Distribution frames are not system-specific and are therefore not discussed here.

Cable traysThe DX 200 system construction does not comprise actual cable trays. The cable support construction arrangements for the external cables are decided upon individu-ally.

Estimated maximum power consumptionThe main input nominal voltage of the Flexi BSC can be -48 VDC or -60 VDC. Direct floating batteries can be used in both cases.

For information on estimated maximum power consumption, see Technical specifica-tions for Flexi BSC and TCSM3i in Installation Site Requirements for Flexi BSC and TCSM.

DN70590621 67

Engineering for Flexi BSC Alarm system for Flexi BSC


7 Alarm system for Flexi BSCThe task of the alarm system is to process the alarm signals collected from the network element and find the basic fault or disturbance behind the alarm condition. The alarm system tries to localise the unit in which a disturbance or a fault has been generated, after which the appropriate automatic recovery functions can be activated. The user is informed of failure conditions with alarm printouts and External Alarm Unit (EXAU-A) controls. The alarm system stores all alarm events on a disk. Alarm history stored on the disk can later be examined with the user terminal.

Alarm functions of the system include:

• collection of alarm data • storing of alarm data • output of alarms • control of alarm printouts

With the user interface, it is possible to cancel or block alarms, output alarm history, and change alarm-specific parameters and EXAU-A controls. See figure Implementation model of the alarm system.

Figure 26 Implementation model of the alarm system

For a general introduction, see Overview of Engineering for Flexi BSC.

7.1 Collection of alarmsThe alarm data can be divided into the following subgroups:

• hardware alarms • fault observations of the program blocks • fault observations of the preprocessors

All the fault observations and alarms of the exchange are saved in the log file of the alarm system.

NetAct

DN03511311

Outside device

User interface

EXAU

Printer

VDU

TCSM

Alarms

LAN or X.25 LAN or X.25

BSC

Alarm system,

alarms from

BSC, BTS, TCSM

and from external

sources

MSC

68 DN70590621



Alarm system for Flexi BSC

Hardware alarmsSupervision logic has been integrated into some types of hardware. The supervision logic can inform the alarm system about malfunctions in the hardware. The following devices have supervision logic:

• power sources • plug-in units which need basic timing signals for their timing

In addition, the following are supervised by the hardware:

• fuses • premises

In the BSC systems, the hardware alarms of the cartridges are wired to the CLS car-tridge, from which they are relayed to the plug-in unit HWAT-B in the OMU cartridge. The alarms are transmitted to normal processing by the alarm system from the HWAT-B by the software.

Fault observations of the softwareThe observations can be passing disturbances detected in the system, ON/OFF-type alarms, or updates of the error ratio counters. The error ratio counters are used to collect information about statistical errors.

Fault observations of the preprocessorsEach preprocessor supervises its own function and environment. The alarm system provides a service to the preprocessors for sending their alarm data directly to the alarm system. The fault observations of preprocessors (AS7, for example) are transmitted to the alarm system through an application program block.

7.2 Alarms from the TCSM3iThe Flexi BSC assigns an identity, a time stamp, an alarm class, a text string, and a physical location to each alarm. The Flexi BSC stores information on the physical location of each piece of the TCSM3i equipment. It converts the logical location informa-tion of the TCSM3i alarms into a physical address. Alarms which indicate that traffic channels, trunks, or other portions of the traffic capacity are lost because the Flexi BSC blocks the respective elements. The TCSM3i is not itself aware of the blocking measures taken by the Flexi BSC.

The user is informed of failure conditions with alarm printouts in the Flexi BSC. The alarm system stores all alarm events on a disk. Alarm history stored on the disk can later be examined with the user terminal. With the user interface, it is possible to cancel or block alarms, output alarm history, and change alarm-specific parameters.

7.3 Alarms from the TCSM2Alarms are transferred over the operation and maintenance link to the Flexi BSC. Current alarms can, however, be viewed on a local MMI terminal. For immediate under-standing at a local MMI terminal, the TRCO software assigns a text string to the alarms.

When the Flexi BSC receives alarms indicating that traffic channels, trunks or other portions of the traffic capacity are lost, it immediately blocks the respective elements in its own system. The TCSM2 itself is not aware of the blocking measures taken by the Flexi BSC.

DN70590621 69



7.4 BTS alarm handling in the Flexi BSCBTS alarm handling in the Flexi BSC collects various fault indications of the system, pro-cesses them, and informs the user of the faults in actual alarm printouts. Moreover, the alarm handling system makes decisions on the basis of alarm indications and activates the radio network recovery when needed, so that the automatic recovery actions are started.

The received BTS alarms are stored in a disk file. The alarm history and the currently active alarms can be displayed with an MML command. The BTS alarm handling MML also allows the user to change certain alarm parameters and to cancel alarms manually.

The alarm handling system receives alarm indications from the following sources in the radio network:

• alarms from the BTS equipment • alarms from the BTS concerning the BTS software • external alarms from the BTS site • alarms concerning PCM lines in the radio network • alarms from LAPD links on the A-bis interface • alarms from A-bis interface equipment

7.5 BSS transmission equipment handlingWhen the equipment is located at a BTS site, the management commands between the Flexi BSC and BTS are sent via the LAPD based operation and maintenance link. The OMU of the BTS forwards the commands to the managed equipment via the local Q1 bus. Possible equipment types at the BTS site are:

• base station interface equipment (BIE) • transmission unit (TRU) • digital microwave radio link (DMR)

Furthermore, four other pieces of transmission equipment (TE), for example optical line equipment, can be connected to the local Q1 bus at the BTS site.

7.6 Nokia Siemens Networks NetAct network management systemNetAct is a network and service management system, which provides centralised man-agement functions for different network technologies and network domains. The NetAct can manage both the network and the services in a centralised manner, meaning that the operator can view the network element status, service quality indicators and traffic from a single screen. A network-wide view is always available.

A unified mediation and adaptation layer (UMA) is the interface towards the different network subsystems, such as the BSS. The UMA is responsible for collecting data from the BSS, such as alarms, events, and measurements. A unified adaptation to network elements and element managers makes it possible to handle alarms and performance indicators in the same way regardless of technology or origin.

The NetAct consists of functionality areas (for example, monitor, reporter, and planner), which provide management capabilities grouped together according to the most relevant operator processes. For the BSS, there is an extensive set of management functionalities available, for example the following:

70 DN70590621



Alarm system for Flexi BSC

• monitoring • reporting • planning • configuring and optimising • system management • service quality management

The hardware solution of NetAct is built of one or more server clusters and operator seats. Regional clusters manage a specific region, while global clusters are intended for centralised network management tasks. When distributing the operations between regional and national management centres, the regional server clusters and third party management systems are connected to the global cluster via a data communication network (DCN). The hardware includes the following:

• high-availability servers (HP-UX) • application servers (Windows and HP-UX) • operator seats • storage area network (SAN) with disk array • DCN backbone

7.7 EXAU-AThe network elements can be equipped with an alarm unit to make the alarm monitoring more efficient. The External Alarm Unit (EXAU-A) is a small device controlled by the HWAT plug-in unit located in the network element. The EXAU-A indicates alarms from the network element with indicator lights and a buzzer.

The EXAU-A panel consists of a base assembly and a cover assembly with a compo-nent board attached to it with three attachment pins. The component board accommo-dates also the power supply and alarm connectors. Functionally, the EXAU-A panel consists of the following blocks:

• component board connected to the cover • base frame for mounting on the wall • alarm inputs, D25 connector on the component board • six indicator LEDs connected to the component board • buzzer mounted on the component board • test, buzzer reset, and silent mode buttons connected to the component board • power supply (-48 V)

DN70590621 71



Figure 27 Block diagram of the EXAU-A

Alarms that activate the buzzer can be selected with DIP switch SW1. The buzzer is con-nected to six alarm inputs, an so are the indicator LEDs. The buzzer can be switched off by the silent mode button. The test button is used to test the operation of the indicator LEDs and the buzzer.

Power is supplied through a protective switch SW2 and fuse F1. When the cover assembly is opened, the power supply to the EXAU-A unit is disconnected.

LEDS BUZZER

CONTROL PCB

ALARM

INPUTS

POWER

SUPPLY

ACKNOWLEDGEMENT

SILENT MODE

TESTING

DN0274838

72 DN70590621


Id:0900d8058033773bConfidential

Synchronisation for Flexi BSC

8 Synchronisation for Flexi BSCSynchronisation principles on the system levelThe primary synchronisation method in the DX 200 network is based on the master-slave principle. In this method, the network elements in a given network are hierarchi-cally organised in such a way that a network element on a higher level in the hierarchy controls the synchronisation of network element(s) one step below it. A DX 200 network element which is synchronised to higher level equipment can, in turn, function as a syn-chronisation source for lower level equipment. The synchronisation signals are transmit-ted through the PCM/SDH lines.

If the connection to the master equipment is broken, the DX 200 equipment can continue operation by switching into plesiochronous mode, that is, by generating their own basic frequency without an external synchronisation reference. When the connection to the master equipment is restored, the equipment will re-synchronise to the synchronisation signal coming from the higher-level exchange or network element.

Architecture of the DX 200 network synchronisationThe DX 200 cellular network synchronisation plan is usually designed in such a way that one of the exchanges in a PSTN or an ISDN network functions as the master exchange and supplies the synchronisation reference to the Mobile Switching Centres (MSCs) in the cellular network. The synchronisation signal is also fed to each MSC from one or more other MSCs of the same network, to ensure the availability of the synchronisation reference in case the connection to the PSTN/ISDN is disrupted.

The MSCs, in turn, supply the synchronisation reference to the DX HLRs (HLRs) of the network, as well as to the base station controllers (BSCs) through the transcoder sub-multiplexers (TCSMs). To ensure protection, each HLR of the network receives the syn-chronisation reference from multiple MSCs, and each BSC from multiple TCSMs. The protection of the synchronisation reference to the TCSMs and BSCs has been arranged by supplying each reference signal through a separate PCM. Figure Synchronisation of the Flexi BSC shows the architecture of the network synchronisation system.

DN70590621 73

Engineering for Flexi BSC Synchronisation for Flexi BSC


Figure 28 Synchronisation of the Flexi BSC

Internal synchronisation of the Flexi BSCEach DX 200 network element has an internal clock generator which receives the refer-ence timing from external synchronisation sources (normally external PCM circuits) and generates pairs of timing signals which are distributed to all other plug-in units in the network element. In the Flexi BSC, each pair normally uses the frequencies 8.192 MHz / 8 kHz.

In the BSCC cabinet, two CLS units are in use. In the TCSA cabinets of the TCSM3i for combined TCSM/BSC installation option, one CLAC is in use in each cabinet.

In the CLS part in the SGC1C-A cartridge, one clock and tone generator plug-in units (CL3TG-UA) is positioned. Performance characteristics of the CL3TG-UA are shown in the following table.

BSC1 BSC2 BSC3 BSC4DN9832874

MSC1 MSC2 MSC3

TCSMs

HLR

sync. in

(for each TCSM unit)

sync. in sync. insync. in

sync. insync. in

sync. in

sync. in

sync. in

sync. in

sync. insync. in

PSTN

74 DN70590621



Synchronisation for Flexi BSC

Number of synchronisation inputs for CL3TG-UA plug-in unit:

• four for PCM lines • two external inputs (120 Ω balanced / 75 Ω unbalanced) / one external input (120

Ω balanced / 75 Ω unbalanced)

The line coding/decoding standards shown in the following table are supported for PCM signals.

Note that the PCM cables carrying the synchronisation signal connect to the ET16 plug-in units powered by different power supplies to ensure protection of the power supply.

Stability (at temp. +5 °C / 41°F to 40°C / 104°F)

< 3×10-7

Stability (due to ageing) < 5×10-9/day

Accuracy after loss of external syn-chronisation

- initially: +/- 1×10-9

- after one day: +/- 2×10-8

Table 18 Performance characteristics of the CL3TG-UA plug-in unit

ETSI version HDB3

ANSI version AMI and B8ZS

protection -

Table 19 Line coding/decoding standards

DN70590621 75

Engineering for Flexi BSC Management network topology for Flexi BSC

Id:0900d805802d402aConfidential

9 Management network topology for Flexi BSCNokia Siemens Networks NetAct offers standard interfaces towards the network ele-ments, the higher-level network management system, and the administrative systems. For more information, see figure NetAct system interfaces.

BSS includes BSC, TCSM (second and third generation transcoder), transmis-sion equipment, and BTS

Figure 29 NetAct system interfaces

The operation and maintenance interfaces between the NetAct and the network elements follow the principles described in the GSM Recommendation 12.01. The protocol stack is implemented in the NetAct for communication between the NetAct and the network elements.

Remote terminal sessions can be established from the NetAct to the DX 200 network elements (Flexi BSC, TCSM, MSC). The PAD (packet assembler/disassembler, X.29) protocol over the X.25 connections is used for the remote terminal.

NetAct supports the following physical interfaces:

• X.25 through packet switched network (digital) • X.25 through time slots reserved from a semipermanently connected PCM link

(digital connection) • LAN

Digital X.25 connection is still feasible, if multiple 64 kbit/s timeslots are used. However, LAN interfaces are mandatory with data speeds higher than 1024 kbit/s. Therefore, a LAN-based operation and maintenance connection is a recommended link option method as the most powerful alternative.

Interface towards the base station subsystemThe interface between the NetAct and the base station subsystem (the BSS) uses the X.25 or LAN connection. The management protocol stack in the BSS follows the princi-ples described in the GSM Recommendations 12.01 and 08.09.

MSC BSSHLR

MSC

BSS PSPDN

X.25 or

LAN

X.25leased line

X.25 or

LAN

64 kbit/s timeslot reserved for O&M

X.25 or

LAN

DN9834272

NetAct

NMC

X.25 or

LAN

76 DN70590621


Id:0900d805802d402aConfidential

Management network topology for Flexi BSC

The network management applications in the BSS and in the NetAct use the file transfer, access, and management (FTAM) for file transfer. The common management informa-tion protocol (CMIP) is used for other network management purposes. Some applica-tions use a remote MMI, that is, the network element's local commands are given from a remote site.

The operation and maintenance network is connected to the time slots of the PCM circuit by means of the signalling interface adapter (AS7). To ensure protection, a spare time slot can also be allocated for the operation and maintenance connections, which is taken into use when the connection through the main time slot is disrupted.

Interface to the switching subsystemThe interface between the NetAct and the switching subsystem (MSC/VLR and HLR/AC/EIR) uses the X.25 or LAN connection and the PAD (packet assembler/disas-sembler, X.29). The switching subsystem is controlled from the NetAct with a remote MML through the PAD. The switching elements send reports and other output to the NetAct through a protocol on top of the X.25. These outputs can be forwarded to output devices or applications in the NetAct.

The management protocol stack is also implemented in the switching subsystem ele-ments. The FTAM can be used for transferring files between the NetAct and the switch-ing subsystem elements.

stmu-gtic

Documents

support mechanic 4t

support mechanic 5t

error ratio counters

local q1 bus

memory banks a2

memory bank j14

memory banks j14

1e environmental requirements