Avaya Canada S12000BTS Base Transceiver Station User Manual 411 9001 142 15102

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S12000 BTS Reference Manual

PE/DCL/DD/0142 15.102/EN Standard May 2005

411--9001--142

< 142 > : S12000 BTS Reference Manual

Wireless Service Provider Solutions

S12000 BTS Reference Manual

Document number: PE/DCL/DD/0142

411--9001--142

Document status: Standard

Document issue: 15.102/EN

Product release: GSM/BSS V15.1

Date: May 2005

Originated in France

NORTEL NETWORKS CONFIDENTIAL:

The information contained in this document is the property of Nortel Networks. Except as specifically authorized in

writing by Nortel Networks, the holder of this document shall keep the information contained herein confidential and

shall protect same in whole or in part from disclosure and dissemination to third parties and use for evaluation,

operation and maintenance purposes only.

You may not reproduce, represent, or download through any means, the information contained herein in any way or in

any form without prior written consent of Nortel Networks.

The following are trademarks of Nortel Networks: *NORTEL NETWORKS, the NORTEL NETWORKS corporate logo,

the NORTEL Globemark, UNIFIED NETWORKS, S2000, S4000, S8000. GSM is a trademark of France Telecom.

All other brand and product names are trademarks or registered trademarks of their respective holders.

Publication HistoryNortel Networks Confidential iii

S12000 BTS Reference Manual

PUBLICATION HISTORY

System release: GSM/BSS V15.1

May 2005

Issue 15.102/EN Standard

Removed information on BSC 6000 due to EOL.

March 2005

Issue 15.101/EN Preliminary

Synchronized with V15.01 Standard

Updated for Review Comments

January 2005

Issue 15.100/EN Draft

Section 1.6: configuration updated

Feature 25493: section 3.3.1.1 updated with information on EDGE implementation

Chapter 5: reference to document GSM/GPRS/EDGE BSS Engineering Rules

updated

System release: GSM/BSS V15.1R

November 2004

Issue 15.52/EN Preliminary

Synchronized with V15.0 Standard

August 2004

Issue 15.51/EN Preliminary

Updated with Review Comments

July 2004

Issue 15.50/EN Draft

Publication History Nortel Networks Confidential

PE/DCL/DD/0142

Added the following statement to Section 2.1: Version 15.1R supports HePA 900

with GSM BTS.

Removed the following statements from the Applicability section: V15.0 features

are not supported on the BSC2G. BSC2G functionality is kept on BSCs running the

14.3 software load.

System release: GSM/BSS V15.0

October 2004

Issue 15.09/EN Standard

HePA updates

September 2004

Issue 15.08/EN Standard

July 2004

Issue 15.07/EN Preliminary

Updated Chapter 2 with power consumption information.

Removed customer names from August history 2003.

Issue 15.06/EN Preliminary

Updated for Helmsman release.

Issue 15.05/EN Preliminary

Added Feature 25621 to Chapter 2

May 2004

Issue 15.04/EN Preliminary

Updated according to the following feature:

24961: S12000 dual band 850/1900 E1

March 2004

Issue 15.03/EN Preliminary

Updated the power amplifier board description.

Publication HistoryNortel Networks Confidential v

S12000 BTS Reference Manual

March 2004

Issue 15.02/EN Preliminary

Up issued this manual for a preliminary release

December 2003

Issue 15.01/EN Draft

V15.0 features are not supported on the BSC2G. (BSC2G functionality is kept on

BSCs running the 14.3 software load).

Update according to the following features:

•

23068

•

24119

For Q00795093, update to Table 2--16, Chapter 2.

Update About this document regarding V15 features not supported on BSC2G.

November 2003

Issue 14.05/EN Standard

For Q00767324, added --25793: S12000 ID/OD 2S888 H4D

Update according to the following features:

•

24396: e--PA 1800 or S8000 and S12000

•

24397: e--PA 900 for S8000 and S12000

•

24381: e--PA 1900 for S8000 and S12000

•

24382: e--PA 850 for S8000 and S12000

•

24981: e--PA redesign 1900 for S8000 and S12000

•

24982: e--PA redesign 850 for S8000 and S12000

August 2003

Issue 14.04/EN Preliminary

The following changes were made throughout the document:

Update the dc power supply diagram of the S12000 outdoor BTS

Update according to the following features:

•

24915: S12000 ind/out up to 2S666/D (1 or 2) + H2D (1 or 2) with HePA/PA

•

25043: S12000 ind/outd up to 3S666/D (1 or 2) + H2D (1 or 2) with PA

•

25044: S12000 ind/out up to 3S121212/H2D (1 or 2) + H4D (1 or 2) with PA

Publication History Nortel Networks Confidential

PE/DCL/DD/0142

•

23849: S12000 1800/T1

•

24963: S12000 850/E1

•

24964: S12000 1900/E1

•

25248: S12K -- 900Mhz/T1

•

24399: eDRX 900 for S8000 and S12000

April 2003

Issue 14.03/EN Preliminary

The following changes were made throughout the document:

Update power supply description of the S12000 outdoor BTS

Update GIPS description

Add frequency band configuration in chapter 1

January 2003

Issue 14.02/EN Preliminary

The following changes were made throughout the document:

Modify the DCU description

Modify the GIPS front face

December 2002

Issue 14.01/EN Preliminary

The following changes were made throughout the document:

Upgrade according to the following feature:

•

PR1505: S8000/S12000 High Power PA (60W)

•

22472: S12000 configuration priority 2

•

SV1374: Network Level Identification of e--DRL and e--PA presence

Add the GIPS module and the associated AC box

Add the four--way hybrid duplexer (H4D 1900 Mhz) RF Combiner

System release: GSM/BSS V13

October 2002

Issue 13.05/EN Standard

Publication HistoryNortel Networks Confidential vii

S12000 BTS Reference Manual

Update according to the V13.2b task force

September 2002

Issue 13.04/EN Preliminary

Update after internal review

August 2002

Issue 13.03/EN Preliminary

Update after internal review

The following changes were made after internal review

900 and 1800 Mhz features were removed

all references to DRX were changed to e--DRX

all references to PA were changed to e--PA

all references to C--DCS and LNS--DCS were removed

all references to single--phase and tri--phase AC boxes were removed

The following checks have been performed:

battery threshold of the PCU

functioning temperature of the rectifiers

values of the PCU breaker (modified)

values of the indoor compartment breaker (modified)

nominal output voltage and output voltage range of the rectifier subrack

July 2002

Issue 13.02/EN Draft

Creation

March 2002

Issue 13.01/EN Draft

Creation

Table of contents Nortel Networks Confidential

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PE/DCL/DD/0142

About this document 0--1...............................................

Applicability 0--1......................................................................

Audience 0--1........................................................................

Prerequisites 0--1....................................................................

Related Documents 0--2...............................................................

How this document is organized 0--3....................................................

Vocabulary conventions 0--3...........................................................

Regulatory information 0--3............................................................

1 Cabinet description 1--1........................................

1.1 Cabinet compartment layout 1--1..............................................

1.1.1 S12000 Outdoor BTS 1--1..........................................

1.1.2 S12000 Indoor BTS 1--5...........................................

1.1.3 Additional equipment 1--8..........................................

1.2 Power supply 1--16...........................................................

1.2.1 S12000 Outdoor BTS 1--16..........................................

1.2.2 S12000 Indoor BTS 1--30...........................................

1.3 Climatic System 1--32........................................................

1.3.1 S12000 Outdoor BTS 1--32..........................................

1.3.2 S12000 Indoor BTS 1--33...........................................

1.4 Plinth 1--34.................................................................

1.5 Physical characteristics 1--35..................................................

1.5.1 S12000 Outdoor BTS 1--35..........................................

1.5.2 S12000 Indoor BTS 1--35...........................................

1.6 Product names 1--36.........................................................

2 Board description 2--1..........................................

2.1 Power Amplifier (PA) 2--1....................................................

2.1.1 Amplifier alarms 2--1...............................................

2.1.2 Power supply 2--2.................................................

2.1.3 Connectors 2--2...................................................

2.2 RECAL board 2--8..........................................................

2.2.1 Functional description 2--8..........................................

2.2.2 Physical description 2--10...........................................

2.2.3 List of connected internal alarms 2--21................................

2.2.4 List of unprotected external alarms 2--27..............................

Table of contents

Nortel Networks Confidential ix

S12000 BTS Reference Manual

2.3 ALPRO board 2--29..........................................................

2.3.1 Principle 2--29.....................................................

2.3.2 Description 2--29...................................................

2.3.3 S12000 Outdoor BTS environmental conditions 2--29...................

2.3.4 S12000 Indoor BTS environmental conditions 2--31.....................

2.3.5 Connectors 2--31...................................................

2.4 F--type converter 2--33.......................................................

2.4.1 Principle 2--33.....................................................

2.4.2 Description 2--33...................................................

2.4.3 Front panel 2--34...................................................

2.5 RF Combiner 2--36...........................................................

2.5.1 Principle 2--36.....................................................

2.5.2 RF Combiner front panels 2--42......................................

2.6 Tx--Filter module 2--48........................................................

2.6.1 VSWR--meter 2--48.................................................

2.7 Compact BCF (CBCF) module 2--51............................................

2.7.1 Functional description 2--51..........................................

2.7.2 Physical description 2--52...........................................

2.7.3 CPCMI Board 2--54.................................................

2.7.4 CMCF board 2--66.................................................

2.7.5 BCFICO board 2--76................................................

2.7.6 CBCF Back Panel (CBP) 2--86.......................................

2.8 DRX, e--DRX, or DRX--ND3 module 2--95.......................................

2.8.1 DRX front panel 2--95...............................................

2.8.2 e--DRX front panel 2--97.............................................

2.9 RX--splitter 2--99.............................................................

2.9.1 Principle 2--99.....................................................

2.9.2 Consumption 2--99.................................................

2.9.3 RX--splitter front panel 2--99.........................................

2.10 Power system 2--104..........................................................

2.10.1 Power system description 2--104......................................

2.10.2 PCU description 2--104...............................................

2.10.3 SRU description 2--109...............................................

2.10.4 GIPS description 2--110..............................................

3 Architecture 3--1...............................................

3.1 Physical architecture 3--1....................................................

3.1.1 Introduction 3--1..................................................

Table of contents Nortel Networks Confidential

PE/DCL/DD/0142

3.1.2 Subsystems 3--1..................................................

3.1.3 Internal buses 3--1................................................

3.2 CBCF functional architecture 3--5.............................................

3.2.1 Switching, synchronization, and concentration 3--5.....................

3.2.2 Control of the alarm management unit 3--11...........................

3.2.3 PCM Interface 3--11................................................

3.3 DRX functional architecture 3--13..............................................

3.3.1 Types of DRX boards 3--13..........................................

3.3.2 DRX digital part 3--13...............................................

3.3.3 DRX radio part 3--31................................................

3.3.4 DRX shutting down 3--34............................................

3.3.5 Power supply board 3--34...........................................

3.4 e--DRX functional architecture 3--35............................................

3.4.1 Modifications between the DRX and e--DRX 3--35......................

3.4.2 Main external connections 3--37......................................

3.4.3 e--DRX functional description 3--38...................................

4 Software descrIption 4--1.......................................

4.1 BTS software presentation 4--1...............................................

4.1.1 Downloadable files 4--1............................................

4.1.2 PROM 4--1.......................................................

4.2 BTS software functions 4--3..................................................

4.2.1 DRX software functions 4--3.......................................

4.2.2 CBCF software functions 4--7.......................................

4.2.3 Maintenance 4--9..................................................

4.2.4 TIL software functions 4--10.........................................

5 Dimensioning rules 5--1........................................

List of figures

Nortel Networks Confidential xi

S12000 BTS Reference Manual

Figure 1--1 S12000 Outdoor BTS: Base cabinet layout 1--2............................

Figure 1--2 S12000 Indoor BTS: Base cabinet layout 1--6..............................

Figure 1--3 External battery cabinet of the S12000 Outdoor BTS (SBS 60 batteries) 1--9...

Figure 1--4 External battery cabinet of the S12000 Outdoor BTS (SBS C11 batteries) 1--10.

Figure 1--5 S12000 Indoor BTS: Cabinet top 1--12.....................................

Figure 1--6 S12000 Outdoor BTS: PCM connection box 1--13...........................

Figure 1--7 S12000 Outdoor BTS: --48 V connection box 1--14...........................

Figure 1--8 External alarm connection box 1--15.......................................

Figure 1--9 S12000 Outdoor BTS: dc power supply diagram 1--19........................

Figure 1--10 Split single phase ac box 1--23............................................

Figure 1--11 Side view of inside of split single--phase ac box 1--24.........................

Figure 1--12 AC box/GIPS with US type user AC plug BTS 1--27..........................

Figure 1--13 AC box/GIPS with E, F, UK type user AC plug 1--28..........................

Figure 1--14 Side view of inside of AC box/GIPS 1--29...................................

Figure 1--15 S12000 Indoor BTS: dc power supply diagram 1--31.........................

Figure 2--1 S12000 BTS: Power Amplifier (type 1) 2--3................................

Figure 2--2 S12000 BTS: Power Amplifier (type 2) 2--4................................

Figure 2--3 S12000 BTS: High Power Amplifier (HePA) 2--5............................

Figure 2--4 RECAL board functional diagram 2--9.....................................

Figure 2--5 RECAL board 2--12......................................................

Figure 2--6 ALPRO board 2--30......................................................

Figure 2--7 F--type converter 2--35...................................................

Figure 2--8 Duplexer--only (D) RF Combiner diagram 2--37..............................

Figure 2--9 H2D RF Combiner diagram 2--38..........................................

Figure 2--10 H4D RF Combiner diagram 2--39..........................................

Figure 2--11 Duplexer--only (D) RF Combiner 2--43......................................

Figure 2--12 Two--way hybrid duplexer (H2D) RF Combiner 2--44.........................

Figure 2--13 Four--way hybrid duplexer (H4D 1800/900 Mhz) RF Combiner 2--45............

Figure 2--14 Four--way hybrid duplexer (H4D 850/1900 MHz) RF Combiner 2--46...........

Figure 2--15 Tx--Filter (Tx--F) module 2--49.............................................

Figure 2--16 Tx--Filter (Tx--F) functional diagram 2--50...................................

Figure 2--17 S12000 BTS: CBCF module 2--53.........................................

Figure 2--18 CPCMI board functional diagram 2--56.....................................

Figure 2--19 CPCMI board 2--58......................................................

Figure 2--20 CPCMI board: hardware switches 2--60....................................

List of figures Nortel Networks Confidential

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PE/DCL/DD/0142

Figure 2--21 CMCF Phase2 board 2--70...............................................

Figure 2--22 BCFICO board 2--77.....................................................

Figure 2--23 CBP board 2--87........................................................

Figure 2--24 DRX module 2--96.......................................................

Figure 2--25 e--DRX module 2--98.....................................................

Figure 2--26 RX--splitter diagram type 1x4 2--100........................................

Figure 2--27 RX--splitter diagram type 2x2 2--101........................................

Figure 2--28 RX--splitter type 1x4 2--102................................................

Figure 2--29 Rx--splitter type 2x2 2--103................................................

Figure 2--30 Power supply rack (seven--rectifier type) 2--108...............................

Figure 2--31 GIPS 2--114.............................................................

Figure 2--32 DCU module 2--115.......................................................

Figure 2--33 ADU module 2--116.......................................................

Figure 3--1 Subsystem architecture with CBCF 3--3...................................

Figure 3--2 CMCF board synchronization (full configuration) 3--7........................

Figure 3--3 Defense connectivity between the CMCF Phase2 boards (full configuration) 3--10

Figure 3--4 DRX board: functional block diagram 3--15..................................

Figure 3--5 AMNU functions 3--16....................................................

Figure 3--6 DCU8 unit diagram 3--22.................................................

Figure 3--7 SPU reception functions 3--24.............................................

Figure 3--8 SPU transmission functions 3--24..........................................

Figure 3--9 Power slaving diagram 3--30..............................................

Figure 3--10 e--DRX board: functional block diagram 3--36...............................

Figure 3--11 Logic unit (e--LDRX): functional architecture 3--40...........................

Figure 3--12 Radio unit (e--RDRX): functional unit 3--47..................................

Figure 4--1 Software functions (with CBCF) 4--4......................................

Figure 4--2 COAM architecture on the CBCF 4--8.....................................

List of tables

Nortel Networks Confidential xiii

S12000 BTS Reference Manual

Table 2--1 Voltage supply connector 2--6............................................

Table 2--2 Data connector 2--7....................................................

Table 2--3 LEDs on the front panel of the RECAL board 2--13...........................

Table 2--4 RECAL board connectors 2--14...........................................

Table 2--5 PCM pin connections 2--15...............................................

Table 2--6 PCM--out pin connections 2--16...........................................

Table 2--7 Internal pin connections 2--17.............................................

Table 2--8 EXT. P pin connections 2--18.............................................

Table 2--9 Ext. NP. pin connections 2--19............................................

Table 2--10 PWR pin connections 2--19...............................................

Table 2--11 P0 (Debug) pin connections 2--20.........................................

Table 2--12 P1 (EPLD JTAG) port pin connections 2--20.................................

Table 2--13 List of alarms and INT0 connector DALIs

(S12000 Indoor BTS, base and extension cabinets) 2--23.....................

Table 2--14 Example of alarm affectation in function of S12000 Indoor configuration 2--24...

Table 2--15 List of alarms and INT0 connector DALIs

(S12000 Outdoor BTS, base and extension cabinets) 2--26...................

Table 2--16 Unprotected external alarms

(S12000 Outdoor BTS, base and extension cabinets) 2--28...................

Table 2--17 ALPRO 25--pin connections 2--31..........................................

Table 2--18 ALPRO 10--pin connections 2--32..........................................

Table 2--19 Output voltages and alarm signals connector 2--34...........................

Table 2--20 Input voltages connector 2--34............................................

Table 2--21 Content of RF Combiner modules 2--36....................................

Table 2--22 Amplifier pin connections 2--40............................................

Table 2--23 VSWR pin connections 2--47..............................................

Table 2--24 CBCF module boards 2--51...............................................

Table 2--25 Functions of CPCMI--E1 and CPCMI--T1 boards 2--55........................

Table 2--26 LEDs on the front panel of the CPCMI board 2--57...........................

Table 2--27 CPCMI board: S3 switch 2--60............................................

Table 2--28 CPCMI board: S1 and S2 switches 2--61...................................

Table 2--29 CPCMI board connectors 2--62............................................

Table 2--30 Pin connections of the P11 connector 2--63.................................

Table 2--31 Pin connections of the P13 connector (Power) 2--64.........................

Table 2--32 Pin connections of the P10 connector (Debug) 2--64.........................

Table 2--33 Pin connections of the P9 connector (JTAG) 2--65...........................

Table 2--34 LEDs on the front panel of the CMCF Phase2 Board 2--69....................

List of tables Nortel Networks Confidential

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PE/DCL/DD/0142

Table 2--35 CMCF Phase2 board connectors 2--71.....................................

Table 2--36 Pin connections of the TEST connector 2--72...............................

Table 2--37 Pin connections of the ETH connector 2--72.................................

Table 2--38 Pin connections of the J3 (BDM) connector 2--73............................

Table 2--39 Pin connections of the J4 (JTAG) Connector 2--73...........................

Table 2--40 Pin connections of the P1 connector 2--74..................................

Table 2--41 Pin connections of the P2 connector 2--74..................................

Table 2--42 Pin connections of the P3 connector 2--75..................................

Table 2--43 Pin connections of the P4 (Power) connector 2--75...........................

Table 2--44 BCFICO board connectors 2--76..........................................

Table 2--45 PCM0/1 pin connections 2--78............................................

Table 2--46 PCM2/3 pin connections 2--79............................................

Table 2--47 PCM4/5 pin connections 2--79............................................

Table 2--48 ABIS pin connections 2--80...............................................

Table 2--49 PWR pin connections 2--80...............................................

Table 2--50 RS232 pin connections 2--81..............................................

Table 2--51 J2 pin connections 2--81..................................................

Table 2--52 J4 pin connections 2--82..................................................

Table 2--53 J6 pin connections 2--82..................................................

Table 2--54 J7 pin connections 2--83..................................................

Table 2--55 TEI Resistor coding on the switch register 2--84.............................

Table 2--56 TEI configuration 2--85...................................................

Table 2--57 CMCF_A (Sign1A) pin connections 2--88...................................

Table 2--58 CMCF_A (Sign1B) pin connections 2--89...................................

Table 2--59 CMCF_A (Sign1C) pin connections 2--89...................................

Table 2--60 CMCF_B (Sign2A) pin connections 2--90...................................

Table 2--61 CMCF_B (Sign2B) pin connections 2--90...................................

Table 2--62 CMCF_B (Sign2C) pin connections 2--91...................................

Table 2--63 CPCMI_0 (Sign3) pin connections 2--91....................................

Table 2--64 CPCMI_1 (Sign 4) pin connections 2--92...................................

Table 2--65 CPCMI_2 (Sign 5) pin connections 2--92...................................

Table 2--66 BCFICO (Sign6A) pin connections 2--93....................................

Table 2--67 BCFICO (Sign6B) pin connections 2--93....................................

Table 2--68 BCFICO (Sign6C) pin connections 2--94....................................

Table 2--69 AL1, AL2, AL3, AL4, AL5, AL6 pin connections

(Power voltage connectors) 2--94..........................................

List of tables

Nortel Networks Confidential xv

S12000 BTS Reference Manual

Table 2--70 Alarm connector 2--105...................................................

Table 2--71 Monitoring connector 2--106...............................................

Table 2--72 Alarm connector 2--111...................................................

Table 3--1 BTS subsystems 3--2...................................................

Table 4--1 CBCF software product names 4--1.......................................

Table 4--2 S12000 BTS family : DRX software product names 4--2.....................

About this documentNortel Networks Confidential 0--1

S12000 BTS Reference Manual

ABOUT THIS DOCUMENT

This document describes the S12000 Indoor and Outdoor Base Transceiver Stations

(BTSs), which are components of the Base Station Subsystem (BSS).

Applicability

This document is part of the BSS Nortel Networks Technical Publications (NTPs).

This document applies to the V15.1 BSS system release.

The S12000 BTS supports the following frequencies:

Single band GSM 850 T1/E1, 900 T1, 1800 T1 and 1900 T1/E1

Dual band GSM 850/1900 T1/E1

CAUTION

GSM--R does not apply to the S12000 BTS.

Audience

This document is for operations and maintenance personnel, and for other users who

want to know more about the BTSs.

Prerequisites

It is recommended that the readers also become familiar with the following

documents:

< 01 > : BSS Overview

< 07 > : BSS Operating Principles

< 124 > : BSS Parameter Dictionary

< 125 > : Observation Counter Dictionary

< 128 > : OMC--R User Manual -- Volume 1 of 3: Object and Fault menus

< 129 > : OMC--R User Manual -- Volume 2 of 3: Configuration, Performance,

and Maintenance menus

About this document Nortel Networks Confidential

0--2

PE/DCL/DD/0142

< 130 > : OMC--R User Manual -- Volume 3 of 3: Security, Administration,

SMS--CB, and Help menus

< 143 > : S12000 BTS Fault Numbers

< 144 > : S12000 BTS Maintenance Manual

Document GSM/GPRS/EDGE BSS Engineering Rules (PE/DCL/DD/0138)

Related Documents

The NTPs listed in the above paragraph are quoted in the document.

About this documentNortel Networks Confidential 0--3

S12000 BTS Reference Manual

How this document is organized

Chapter 1 describes the layout and contents of the BTS cabinets.

Chapter 2 describes the functions of the BTS boards and modules, and also describes

their front panels.

Chapter 3 examines BTS architecture and describes the physical structure, focusing

on the functional architecture of the subsystems.

Chapter 4 lists BTS software entities and shows how they are installed on the

hardware units.

Chapter 5 indicates that the dimensioning rules are now contained in GSM BSS

Engineering Rules document.

Vocabulary conventions

The glossary is included in the NTP < 00 >.

Regulatory information

Refer to the NTP < 01 >.

Cabinet descriptionNortel Networks Confidential 1--1

S12000 BTS Reference Manual

1 CABINET DESCRIPTION

1.1 Cabinet compartment layout

1.1.1 S12000 Outdoor BTS

The base cabinet and the extension cabinet are divided into three parts:

top compartment

left side

right side

The layout of the equipment in the base and extension cabinets is identical in the

top compartment and on the left side.

The cabinet layout on the right side of the base and extension cabinets is different.

In the base cabinet, the CBCF is located in the CBCF compartment. In the same

compartment of the extension cabinet, a filling plate replaces the CBCF.

The top compartment opens by means of a cover on the top of the cabinet. The front

of the cabinet is perforated to allow air to circulate. The top compartment has two

elements: the optional battery box and the climatic system (DACS).

User compartment

This compartment is available for Original Equipment Manufacturer (OEM). For

more information, refer to the documentation provided by the equipment

manufacturer.

The user interconnection compartment is optional. It is required only when a user

kit or a --48 V connection box is used.

PA interconnection compartment

The PA interconnection compartment centralizes the --48 V dc power supply of the

Power Amplifiers (PA).

Amplifier compartment

The amplifier compartment receives up to twelve Power Amplifiers (PA).

RECAL compartment

This compartment contains the RECAL board. The RECAL board is connected to

one or two external alarm protection boards (ALPRO), located outside the cabinet.

Cabinet description Nortel Networks Confidential

1--2

PE/DCL/DD/0142

DRX--ICOA

DRX

4RX splitters

DRX--ICO B

DRX

4RX splitters

User rack

CBCF

Power system

PA--ICO

DACS Batteries

RECAL 2 F--type converters User interconnections

Filler

12 PA

AC box

COM--ICO

8 RF--combiners

Filler

01 2 34 5

67891011

01 2 34 5

67891011

4RF--

combiners

rack

Figure 1--1 S12000 Outdoor BTS: Base cabinet layout

Cabinet descriptionNortel Networks Confidential 1--3

S12000 BTS Reference Manual

F--type converter

A converter, called F--type converter, supplies ±15 V dc to the LNA--splitter and

the VSWR--meter.

A second F--type converter is available as an option.

RF Combiner and Tx--Filter compartments

The RF Combiner and Tx--Filter compartments can hold a maximum of either of

the following combination of modules (4 on the left, 8 on the right):

twelve RF duplexer (D) plus LNAs

twelve RF duplexer (D) plus LNAs plus Tx--Filter modules

twelve two--way RF Hybrid Duplexer type (H2D) plus LNAs

six RF four--way Hybrid Duplexer type (H4D) plus LNAs

Note: Depending on the coupling system used, an RF--combiner can contain a

duplexer, an H2D or H4D transmitter coupler, an LNA splitter, and an optional

VSWR meter.

The D, H2D, and H4D RF Combiner modules perform the following functions:

transmission coupling of two, three, or four channels

filtering and duplexing of transmission and reception signals on the same

antenna port

amplification of reception signals

monitoring of the antenna VSWR (option)

The Tx--Filter performs the following functions:

filtering of transmission signals

monitoring of the antenna VSWR (option)

Combiner interconnection compartment (COMICO)

The COMICO is the interconnection board for the modules of the RF Combiner

compartment that centralizes inputs/outputs on the alarms and the power supplies.

COMICO collects and connects alarms to RECAL.

CBCF Compartment

Two CBCF boards are visible on the front panel of the CBCF module:

Compact Main Common Function (CMCF)

Compact PCMI (CPMI)

Since there is no CBCF in the extension cabinet, a filling plate occupies the place

of these units.

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DRX interconnection compartments (DRX--ICO A and DRX--ICO B)

The interconnection compartments centralize DRX outputs. They assure

interconnection between DRX via the FH bus, PA, RECAL and CBCF modules.

DRX compartments

These compartments receive up to twelve modules, 6 in each.

RX--splitter compartments

The RX--splitter compartments receive up to eight RX--splitters, which receive RF

signals from the LNA splitter and distribute them to the DRXs RX inputs.

Power system compartment

The power system compartment may be configured with:

a Power Controller Unit (PCU) and up to seven 600W or 680W rectifiers (one of

them redundant).

or a GIPS module including a DC Distribution and Control Unit (DCU), up to

seven 680W rectifiers (one of them redundant), and an AC Distribution Unit

(ADU).

The rectifiers convert Mains Voltage to --48 V dc to be used in the cabinet.

According to the number of DRXs per cell, the number of rectifiers may be

decreased.

AC box

This box is located on the right--hand side of the right--hand part of the cabinet. Two

types of AC box are available:

The AC box associated with the power system with PCU. It receives the mains

voltage and distributes it to the power system compartment and to the cooling

system. The PCU only controls the dc supply. The ac supply connects to the back

panel, which is common for all rectifiers.

The AC box/GIPS associated with the GIPS. It receives the mains voltage and

distributes it to the power system compartment and to the user ac plug.

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1.1.2 S12000 Indoor BTS

The compartment layout of the base cabinet is presented in Figure 1--2.

Cabinet top

The cabinet top (see Figure 1--5) can hold a maximum of two ALPRO modules.

An ALPRO module consists of an ALPRO board, a protection cover, and an

interconnection plate.

Combiner interconnection (COMICO) compartment

This compartment consists of an interconnection board for the combiner

compartment modules, which centralizes inputs/outputs on the alarms and the

power supplies.

RF combiner and Tx--Filter compartment

The RF Combiner and Tx--filter compartment can hold a maximum of either of the

following combination of modules:

twelve RF duplexer (D) plus LNAs

twelve RF duplexer (D) plus LNAs plus Tx--Filter modules

twelve two--way RF Hybrid Duplexer type (H2D) plus LNAs

six RF four--way Hybrid Duplexer type (H4D) plus LNAs

Note: Depending on the coupling system used, an RF--combiner can contain a

duplexer, an H2D or H4D transmitter coupler, an LNA splitter, and an optional

VSWR meter.

The RF Combiner modules perform the following functions:

transmission coupling of the channels

filtering and duplexing of transmission and reception signals on the same

antenna port

amplification of reception signals

monitoring of the antenna VSWR (option)

The Tx--Filter performs the following functions:

filtering of transmission signals

monitoring of the antenna VSWR (option)

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8 RX Splitters

12 DRX

DRX--ICO

12 PA

PA--ICO

6 RF--combiners

COM--ICO Breakers

2F--type converters

RECAL

CBCF

6 RF--combiners

Internal Cooling

System

0123 456 7891011

Figure 1--2 S12000 Indoor BTS: Base cabinet layout

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DC compartment

This compartment contains three switches to disconnect the power supply to the

Power Amplifiers, the fans, and the RECAL/CBCF board.

F--type converters

The compartment also contains an F--type converter, which supplies ±15 V dc to

the LNA--splitter and the VSWR--meter. A second F--type converter is available as

an option.

PA interconnection compartment

This compartment centralizes the --48 V dc power supply of the Power Amplifiers

(PA).

Power Amplifier compartment

This compartment contains one to twelve power amplifiers (PAs).

RECAL board

The RECAL board can be connected to one or two external alarm protection boards

(ALPRO) located on top of the base cabinet.

DRX interconnection compartment

This compartment centralizes DRX outputs. It connects them to the Power

Amplifiers (PA) on the one hand , and interconnects them via the FH bus on the

other.

DRX Compartment

This compartment contains a maximum of twelve modules.

CBCF Compartment

This compartment contains the CBCF module.

RX--splitter compartment

This compartment contains up to eight RX--splitters, which receive data signals

from the units in the coupler compartment and distributes them to the DRXs.

Climatic compartment

This compartment contains two fans, and a board. One fan is optional and is used

to ensure redundancy. This board enables the control of the rotation of each fan and

sends an alarm (one for each fan) to the RECAL board when the fan speed goes

below a fixed threshold.

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1.1.3 Additional equipment

1.1.3.1 Battery cabinet

A cabinet, independent from the BTS cabinet, can be added to increase the power

autonomy of the BTS in case of a mains power failure. This cabinet may house one

of two possible types of battery. The batteries are arranged in four strings, each

containing four batteries (see Figure 1--3).

The internal batteries must first be disconnected before using these batteries.

These batteries autonomy depend on the configuration and the equipment of the

BTS, and can vary between 30 minutes and 14 hours.

The cabinet dimensions are described in NTP < 01 >.

Below the four battery strings is the Heating Ventilation Unit (HVU), consisting of

the following:

afan

a heating resistor

a controller

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box

Nut no. 2

Plinth

Nut no. 1

Clamp

1bis

DC breaker

AC box

62bis

AC breaker

73bis

484bis

Blue cable

Black cable

Figure 1--3 External battery cabinet of the S12000 Outdoor BTS (SBS 60 batteries)

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box

Plinth

dc breaker

AC box

ac breaker

11bis5

22bis6

33bis7

44bis8

Strap

Black cable

Blue cable

Lug no. 2

Clamp

Lug no. 1

Figure 1--4 External battery cabinet of the S12000 Outdoor BTS (SBS C11 batteries)

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1.1.3.2 PCM connection box (S12000 Outdoor BTS option for GSM 850/1900)

This box is available as an option to protect two PCM links. An upgraded kit allows

the protection of up to six PCM links.

The PCM connection box is waterproof and can be put either in the BTS plinth or

on--site outside the BTS (see Figure 1--6).

The box can be fitted as suitable to the customer.

1.1.3.3 --48 V dc connection box (S12000 Outdoor BTS option for GSM 850/1900)

This box is available as an option to provide an external --48 V plug on--site.

The --48 V connection box is waterproof and can be put either in the BTS plinth or

on--site outside the BTS (see Figure 1--7).

The box can be fitted as suitable to the customer.

1.1.3.4 External alarm connection box (GSM 850/1900)

This box exists in two versions:

The outdoor version includes one or two ALPRO boards and the related primary

protection modules. It protects up to 16 external alarms (8 per ALPRO board)

and four remote controls (two per ALPRO board).

The external alarms connection box is waterproof and can be put either in the BTS

plinth or on--site outside the BTS (see Figure 1--8).

The indoor version includes one ALPRO board, which protects up to 8 external

alarms and two remote controls. Two indoor version boxes can be put on the top

of the S12000 indoor BTS (see Figure 1--5).

The box can be fitted as suitable to the customer.

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--48V

ALPRO 0

ALPRO 1

Equipotentiality

stud

ALPRO 1

connector

RF connector

ALPRO 0

connector

Terminal blocks

Ground

bar

Figure 1--5 S12000 Indoor BTS: Cabinet top

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Figure 1--6 S12000 Outdoor BTS: PCM connection box

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Figure 1--7 S12000 Outdoor BTS: --48 V connection box

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Figure 1--8 External alarm connection box

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1.2 Power supply

1.2.1 S12000 Outdoor BTS

The power system supplies 48 V DC power to the modules in the cabinet from the

main power supply. Two solutions have been implemented to power supply

modules of S12000 Outdoor BTS (either one or the other, but never both together).

The first system is PCU based system

The second system is DCU based system: GSM Integrated power system

The PCU based system is implemented only in the 1900/850 BTS at the beginning

of the S12000 life cycle. In a second time the DCU based system (GIPS) replaces

the first system and is generalized in all types of BTS. Most of the functions are

common to both system (PCU and DCU based).

1.2.1.1 General description

This description is applicable to both systems, PCU based and DCU based (GIPS).

The basic functions of the power system are the following:

It accepts AC power and converts it up to 4200 W (PCU based) or 4760W (DCU

based) of DC power for the DC loads of the base station.

It provides an optional redundancy of DC power.

it provides separate controlled and overload protected DC outputs for each of the

DC loads.

It supports the charging and discharging of batteries that provide operational

power when the AC input is not available.

It monitors the state of the power system and reports the status to the host base

stations (alarms to RECAL board).

1.2.1.2 AC Distribution functions

3 types of AC power supply are supported:

mono phased (only supported by GIPS)

tri phased (only supported by GIPS)

split phase (supported by GIPS and PCU based system)

The AC distribution provides:

surge suppression

a system level circuit breaker for rectifiers power on/off and overload protection

a circuit breaker for DACS power on/off and overload protection

EMI filtering

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1.2.1.3 User plug

The user plug is always available in the PCU based system (US plug type only), but

is optional for the GIPS.

1.2.1.4 Rectifier modules

The rectifiers convert input AC power into DC power for the DC loads within the

base station. The nominal output voltage is --54.6Vdc. The DC control system varies

the output voltage from --40Vdc to --58.3Vdc in order to manage the charging of an

attached battery string.

PCU based system receives both 600W or 680W rectifiers, but for 680W rectifier

use, the output power is limited to 600W.

DCU based system (GIPS) can only receive 680W rectifiers. A mechanical way

prevents 600W rectifier insertion.

Up to seven rectifiers (6+1 for redundancy) are housed in a rectifier shelf. Their

outputs are connected in parallel through the shelf back plane.

1.2.1.5 Batteries

There are two types of battery units:

internal batteries mounted on the top of the cabinet, which consist of four 12 V dc

batteries in series (one string)

external batteries located in the external battery cabinet, and configured in a

maximum of four strings. Each string consists of four 12V dc batteries in series,

the four strings being connected in parallel.

Sealed lead batteries are used.

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1.2.1.6 DC Distribution and control functions

The main function consists in the interconnection of the rectifiers set to the modules

of the BTS and to the batteries.

DC distribution

Both power systems provide 4 outputs to the different S12000 modules:

PA: DC distribution to the power amplifiers set

DRX: DC distribution to the DRX set

BCF: DC distribution to the basic functions of the BTS (CBCF, RECAL and the

user rack)

DACS: DC distribution to the cooling unit

It generates a disconnection of its four load outputs depending on :

the batteries output voltage level

the internal temperature of the cabinet

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Fuse 10A

Fuse 2A

Fuse 10A

Fuse 1A

Fuse 4A

PCU/DCU

CBCF

DRX--ICOA CBCF compartmentPA -- I C O D R X -- I C O B

RECAL

80A

breaker

User

15A

breaker

15A

breaker

10A breaker

(PCU)

15A breaker

(DCU)

(Time delay)

90A

breaker

(*)

Internal

batteries

DRX

Climatic

system 2F--type

converters

12 power

amplifiers

Legend:

PA--ICO: Power Amplifier interconnection

DRX--ICO: DRX interconnection

Note: (*) The 90A breaker is used either for the internal battery or the external battery.

ac input

ac/dc

rectifiers

Figure 1--9 S12000 Outdoor BTS: dc power supply diagram

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Batteries management

When the power system stops supplying DC voltage, the batteries are the only

possible DC power supply.

The power system allows the cabinet to run on either internal or external batteries

(connection of the internal or external batteries is carried out manually, and it is not

possible to connect both types simultaneously). Two operating options are possible.

Option 1 (for PCU based system only):

•

If AC power is available, the power system powers all the outputs and, if

necessary, supplies power to the batteries (charging phase).

•

If the power system does not supply any power, the internal or external

batteries energize BCF and DACS outputs (discharging phase).

Option 2 (for PCU based system and GIPS):

•

If AC power is available, the power system powers all the outputs and, if

necessary, supplies power to the batteries (charging phase).

•

If the power system does not supply any power, the internal or external

batteries energize all the outputs (discharging phase).

During the discharging phases the battery output voltage decreases over time.

So, when the battery output voltage reaches LVD45 (--45V +/--1%), the power

system cuts off power supply to the boards in the cabinet that are connected to PA

and DRX outputs. An alarm is generated.

If the battery output voltage continues to decrease and reaches LVD42 (--42V

+/--1%), the power system cuts off power supply to the boards in the cabinet that

are connected to BCF and DACS outputs.

If the rectifiers recover power supply, the batteries are charging. When voltage is

equal to 50.6V +/-- 0.5%, the power system reconnects the cabinet boards with its

four outputs.

The power system receives an analog signal from a temperature probe located on

the batteries (internal or external) and sends a signal to the rectifiers to adjust the

rectifier output voltage inversely to battery temperature (floating voltage).

Alarm monitoring

The following alarms are provided to the RECAL board by the power system:

Load1 threshold (LVD45)

PCU protective devices (PA & DRX DC Breaker)

Battery on discharge

DC fault

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AC fault

Over temperature

Cabinet extreme ambient temperature management

A signal (CEATS1) is provided by two ambient temperature probes (one is located

at the top of the cabinet, the other at the bottom) to the system power.

When activated, this signal causes the disconnection of all outputs connected to the

rectifiers and to the batteries

1.2.1.7 PCU based power system description

The PCU based power system is composed of the following parts:

an AC Main module

a Power Control Unit (PCU)

a set of up to seven rectifier units

a set of batteries

AC main

It provides the AC distribution functions.

It is made of an AC Main box with:

main power supply connections (split phase only)

a surge protection

an EMI filter

a user plug (US plug type only)

a main breaker, a DACS breaker, a rectifier breaker and an AC plug breaker

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PCU (Power Control Unit)

It provides the DC distribution and control functions.

It includes the PA breaker, the FAN breaker (DACS), the DRX breaker and the BCF

breaker. The batteries breaker is mounted on an external front panel.

The PCU is located in the rectifier shelf. It is an integral part of this sub--rack and

is not a Field Replaceable Unit (FRU).

Rectifier modules

PCU based system can receive both 600W or 680W rectifiers, but in case of 680W

rectifier use, the output power is automatically limited to 600W.

The rectifier shelf accepts up to seven rectifiers providing up to 4200W without

redundancy or 3600W with redundancy.

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Climatic system circuit breaker

(15A)

Main circuit breaker (50A)

Two electrical outlets with

incorporated differential (5 mA)

Rectifier circuit breaker (35A)

ac voltage to the rectifiers

Ground

ac lightning protector

Fuse for the 15A electrical outlets

(F02, 250V, time delay)

Alarm return to the RECAL

board

ac voltage to the climatic system

and the heaters

Figure 1--10 Split single phase ac box

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Climatic

system circuit

breaker

Alarm return to

RECAL board

Two electrical outlets

with incorporated

differential cut--outs (5mA)

Main circuit

breaker

Rectifier

circuit breaker

ac voltage

to climatic

system and

heaters

ac voltage to

rectifiers

Filter neutral

Filter phase 1 Lightning

protector

ac power supply

15A fuse for electrical outlets

Ground

Filter phase 2

Figure 1--11 Side view of inside of split single--phase ac box

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1.2.1.8 DCU based power sytem description (GIPS)

The DCU based power system is composed of the following parts:

an AC Box module and an optional User AC Plug kit

an AC Distribution Unit (ADU)

a DC Distribution and Control Unit (DCU)

a set of up to seven rectifier units

a set of batteries

AC BOX/GIPS and user ac plug

It includes only main power supply connection.

The GIPS based power system operates from 3 types of AC power networks

depending on the AC Box internal interconnection:

single phased network

three phased network

split phased network

An optional User AC plug kit is connected to the AC Box. Four plug types are

available:

european type E

european type F

The user plug kit includes a breaker (differential breaker for European models and

fuse for North American models).

ADU (AC Distribution Unit)

It provides the AC distribution functions.

The ADU is located in the rectifier shelf and is a Field Replaceable Unit (FRU).

It includes:

a surge protection

EMI filters

a DACS breaker, rectifier breakers

DCU (DC Distribution and Control Unit)

It provides the DC distribution and control functions.

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It includes the PA breaker, the DACS breaker, the DRX breaker and the BCF

breaker. The batteries breaker is mounted on an external front panel.

The DCU is located in the rectifier shelf. It is an integral part of this sub--rack and

is not a Field Replaceable Unit (FRU).

Rectifier modules

DCU based system (GIPS) receives only 680W rectifiers. A mechanical way

prevents 600W rectifier insertion.

The rectifier shelf accepts up to seven rectifiers providing up to 4760 W without

redundancy or 4080 W with redundancy.

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US AC plug

5mA/120Vac

Indicator fuse 15A

AC voltage to

the power system

compartment

AC input

terminal block

Figure 1--12 AC box/GIPS with US type user AC plug BTS

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European AC

plug 230Vac

Differential circuit

breaker 6A/30mA

AC voltage to

the power system

compartment

AC input

terminal block

Figure 1--13 AC box/GIPS with E, F, UK type user AC plug

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AC BOX

Mains

Ground

to GIPS

AC plug kit

(optional)

Electrical outlet

Fault

Interrupter

(differential breaker)

Figure 1--14 Side view of inside of AC box/GIPS

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1.2.2 S12000 Indoor BTS

Figure 1--15 shows the dc power supply distribution. Two filters protect the dc

distribution input against conducted emission. The dc power supply feeds the dc

compartment where four outputs come out to the following equipment groups:

the twelve power amplifiers and the two F--type converters, through the power

amplifier interconnection module

the two fans, through the fan interconnection module

the twelve DRXs, through the DRX interconnection module

the CBCF

the RECAL board

The dc compartment houses four breakers to disconnect the powering of these

equipment groups.

The dc distribution for each group uses three cables:

+0 V dc

-- 4 8 V d c

ground

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ac input

dc compartment

100A

breaker

10A

breaker

12 power

amplifiers

2F--type

converters 12 DRXs

Legend :

PA--ICO : Power Amplifier interconnection

FAN--ICO : Fan interconnection

DRX--ICO : DRX interconnection

EMI filters

PA/DRX

FANS RECAL

CBCF

breaker

CBCF

2 fans

CBCF

RECAL

PA_ICO FAN_ICO

DRX_ICO

Fuse 10A

Fuse 2A

Fuse

Fuse 4A

Fuse 10A

Figure 1--15 S12000 Indoor BTS: dc power supply diagram

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1.3 Climatic System

1.3.1 S12000 Outdoor BTS

The climatic system controls the inside temperature of the cabinet. It is located in

the top compartment of the cabinet. The climatic system consists of a Direct

Ambient Cooling System (DACS).

The operating principle is the following:

An air damper opens to admit external air (incoming air is filtered) and controls

the inner cabinet environment by mixing appropriate amounts of outside and

recirculated air.

Twin blowers drive air down the rear duct and into the equipment enclosure via

slots at the rear. Returned air to the cooling system is routed through two sets of

holes in the base, with excess air being rejected from vents located on either side

of the system.

The internal temperature control is achieved by a high quality thermistor that has

an accuracy of ±0.2°C (0.36_F) between 0°C(32_F) and 70°C (158_F). This device

is located in the left hand exit duct above a hole on the duct side; the hole ensures

that the thermistor is constantly in a moving air stream, regardless of damper

position. The operational mode of the Cooling system is solely dictated by the

information provided by the thermistor.

There are four operational modes:

Low temperature --40°C(--56°F)<Tcab<15°C(59°F)

The heater is powered on, the damper is closed to the outside and air is

recirculated via the holes in the base of the cooling system.

Medium temperature 15°C(59°F)<Tcab<40°C (104°F)

The heater is switched off, the damper remains closed and further heating of the

equipment enclosure is achieved solely by the internal equipment loading.

Normal temperature Tcab = 40°C (104°F)

The damper position is controlled automatically by the modulating motor,

mixing appropriate amounts of recirculated and external air to maintain a

constant temperature. Excess air is rejected from the cooling system from vents

at either side of the cooling system.

High temperature Tcab > 40°C (104°F)

Although the damper is fully open, the cooling system is unable to keep the

cabinet temperature to 40°C (104°F) which now rises in sympathy with the

external temperature. At an outside temperature of 50°C (122°F), the internal

cabinet will rise to a nominal 60°C (140°F) under fully loaded conditions.

The cooling system is supplied with:

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two hard alarm outputs:

•

The first alarm output signals a fault on the cooling system.

•

The second alarm output indicates a maintenance requirement for the filter.

three alarm LEDs for on--site fault diagnostics:

•

The red LED indicates a critical alarm for fan failure.

•

The yellow LED indicates a critical alarm for heater circuit failure.

•

The green LED indicates a maintenance alarm for clogged filter.

On the top of the cooling system, there is a window in the lid which allows the

user to view the LEDs. The LEDs are normally lit when healthy and off alarm.

The cooling system is dc powered which allows internal or external battery

back--up. The dc power consumption of the cooling system is 400--450 W. The cold

start--up performance of the unit is controlled by an inbuilt ac to dc converter (for

operation of the fans) and by a 2.5 kW heating element.

1.3.2 S12000 Indoor BTS

The Internal Cooling System (ICS) controls the inside temperature of the cabinet.

It is located in the lowest compartment of the cabinet. The ICS consists of a rack

which contains:

two blowers

a filter

a converter

a control board

a front panel which contains three LEDs:

•

FAN1/CONV, which is lit green when there is no failure on the first fan or on

the converter.

•

FAN2, which is lit green when there is no failure on the second fan.

•

FILTER, which is lit green when the filter is not clogged.

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1.4 Plinth

The S12000 Outdoor BTS cabinet can be installed on a plinth allowing for cable

passage. The plinth characteristics are described in NTP < 01 >.

The plinth may contain the external alarm connection box, the PCM connection box

and the --48 V dc connection box.

These boxes are screwed into the inside of the plinth.

The S8000 plinth can be used for the S12000 Outdoor BTS.

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1.5 Physical characteristics

1.5.1 S12000 Outdoor BTS

Physical characteristics

RefertoNTP<01>.

Operating temperature

To operate correctly, the BTS requires a temperature greater than --40°C(--56°F)

and less than +50°C (+122°F).

Autonomy of the internal battery

The internal battery is an optional equipment located in the top compartment. The

battery backup time depends on the configuration and the BTS equipment, and can

vary from 30 minutes to a few hours.

1.5.2 S12000 Indoor BTS

The S12000 Indoor BTS cabinet can be wall--mounted or put on the floor.

Physical characteristics

RefertoNTP<01>.

Operating temperature

When the base cabinet is turned on, the external ambient air temperature must be

between 0°C(32°F) and 45°C(113°F).

Once in operation, the base cabinet requires an external ambient air temperature

above --5°C(23°F) and below 45°C(113°F).

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1.6 Product names

A BTS contains one or more cabinets and the associated supplies (cables, covers,

endings, etc.).

BTS products are identified by six items:

Sectorization Number of X = Number of sectors

Number of cabinets

Frequency DCC number of DCC or

DSC

Cabinet type

PCM type

option and impedance

Number of TRXs in the first sector Number of TRXs in the second sector

Number of TRXs in the Xth sector

TX type, power, radio

test, encryption

Number of DTI or PCMI

boards

Letter for future use

BBB FF UUU VSXX....Xzz PP/PP QRA

Type of coupling system

Example: BBB = OUD (S12000 Outdoor BTS)

BBB = IND (S12000 Indoor BTS)

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Board descriptionNortel Networks Confidential 2--1

S12000 BTS Reference Manual

2 BOARD DESCRIPTION

2.1 Power Amplifier (PA)

The Power Amplifier (PA) amplifies the GUMS signal from a low--level

transmission unit and sends it to the transmission coupler.

HePA is compatible with e--DRX (all frequencies) and DRX ND3 (900) and with

the indoor and outdoor S8000 and S12000 cabinets. The cabinet can contain a

maximum of 12 HePAs.

Three types of PA are available : PA, ePA and HePA (High Power Amplifier). The

HePA can be used mixed with PA and ePA.

PA and ePA are class 5 amplifiers, that is, they can provide power of between 20 W

and 40 W. Nominal power is 30 W.

HePA is the BTS Power Amplifier with transmit power up to 60 W in GMSK and

is Edge compatible.

HePA is compatible with S8000 CBCF and S12000 cabinets (indoor + outdoor) and

works with eDRX and DRX ND3. HePA is not compatible with DRX.

The HePA can be mixed with PA in step coupling configurations. It can be mixed

with (e)PA in a normal cell if its power is being configured with a value that is

compatible with (e)PA (lower than 30 Watt).

The range of value of the OMC parameter ”bsTxPwrMax” that sets the power of

the TRX, already permits to configure power up to 60 Watts.

The HePA is differentiated at the OMC from PA and ePA; in the same way the ePA

is differentiated from the PA.

It contains its own dc/dc converter and contains a microcontroller which allows it

to dialogue with the low--power transmission module. This function makes it

possible to move the power amplifier to the top of the tower if necessary.

2.1.1 Amplifier alarms

The power amplifier provides several alarms:

an overtemperature alarm, whose threshold is set in the PA

an overvoltage alarm, whose threshold is set in the PA

an alarm indicating that the PA output reflected power is exceeded

This alarm is triggered when the reflect power exceeds 6W.

an alarm dedicated to the DC/DC converter

Board description Nortel Networks Confidential

2--2

PE/DCL/DD/0142

a communication alarm

This alarm is triggered by a parity bit error or control byte error.

an input power alarm, whose threshold is set in the PA

The DRX must then reduce its output level (PA input level) to make the alarm

disappear

a consumed current alarm whose threshold is set in the PA

2.1.2 Power supply

The power amplifier receives a 48 V power supply from the cabinet. The converter

accepts an input voltage between 36 V and 57 V (nominally 48 V). It then provides

the regulated 24 V voltage needed for operation of the PA radio stages.

Maximum consumption is 220 Wfor PA, 200 Wfor ePA and 290 Wfor HePA 1900

MHz or 230 W for HePA 900 MHz. Actual consumptions are lower, with a typical

maximum of 170 W for ePAs, 230 W for HePA 1900 and 200 W for HePA 900.

S12000 indoor:

At low speed:

The HePA operates 12°C lower in S12000 than in S8000.

The HePA temperature rise is 4°C lower than specification in S12000 (+26°C

above ambient).

At high speed:

The HePA operates 17°C lower in S12000 than in S8000.

The HePA temperature rise is 9°C lower than specification in S12000 (+26°C

above ambient).

2.1.3 Connectors

The power amplifier connectors are located on the front panel.

Board descriptionNortel Networks Confidential 2--3

S12000 BTS Reference Manual

DATA I/O

POWER IN

RF OUT

RF SAMPLERF IN

FUSE

10A

Note: In the S12000 Indoor BTS, the front panel is inverted

compared to the figure presented

F1 Fuse

10A

250V time delay

Figure 2--1 S12000 BTS: Power Amplifier (type 1)

Board description Nortel Networks Confidential

2--4

PE/DCL/DD/0142

DATA I/O

POWER IN

RF OUT

RF IN

Note: In the S12000 Indoor BTS, the front panel is inverted

compared to the figure presented

Figure 2--2 S12000 BTS: Power Amplifier (type 2)

Board descriptionNortel Networks Confidential 2--5

S12000 BTS Reference Manual

DATA I/O

POWER IN

RF OUT

RF IN

Note: In the S8000 Indoor BTS, the front panel is inverted

compared to the figure presented.

Figure 2--3 S12000 BTS: High Power Amplifier (HePA)

Board description Nortel Networks Confidential

2--6

PE/DCL/DD/0142

2.1.3.1 Radio connectors

There are three radio connectors:

The radio input connector, marked “RF IN”, is a female, SMA connector.

The radio output connector, marked “RF OUT”, is a female, N--type connector.

The test connector, marked “RF SAMPLE”, is a female, SMA connector.

According to to the PA type, this connector is optional.

2.1.3.2 Voltage supply connector

The --48 V supply of the PA is supplied through a male, three--pin connector. The

pin connections are as follows:

148 V (--)

2GND

30V

Table 2--1 Voltage supply connector

Board descriptionNortel Networks Confidential 2--7

S12000 BTS Reference Manual

2.1.3.3 Data connector

The data input/output connector is a 20--pin connector. The pin connections are as

follows:

1GND

2GND

3SYNC

4MEU_DATA_OUT

5Selection of PA operating mode

6SECT_SEL_0 (not used by the PA)

7MEU_DATA_IN

8Test point

9Test point

10 Test point

11 GND

12 GND

13 NSYNC

14 NMEU_DATA_OUT

15 Test point

16 SECT_SEL_1 (not used by the PA)

17 NMEU_DATA_IN

18 Test point

19 Test point

20 Test point

Table 2--2 Data connector

Board description Nortel Networks Confidential

2--8

PE/DCL/DD/0142

2.2 RECAL board

2.2.1 Functional description

The RECAL board is the alarm management unit used with the CBCF. The RECAL

collects external and internal alarm loops and alarms associated with OEM

equipment.

A slave of the CBCF, the RECAL board sends alarms to the CBCF over a Private

PCM link. The CBCF signals the BSC when there is an alarm.

There is one RECAL board per cabinet.

The following functional blocks of the RECAL board are shown in Figure 2--4:

Control unit

Alarms interface

Communication interface

Power supply

2.2.1.1 Alarm management

The RECAL board collects three types of alarms:

Internal alarms

Unprotected external alarms

Protected external alarms

Internal alarms

The RECAL board detects up to 56 internal alarms logical signals.

Internal alarms are wire loops that can only be opened or closed by dry contacts or

open collectors.

A closed loop forces a low logic level (less than 1.35 V) on the trigger output, which

indicates that there is no alarm. An open loop forces a high logic level (greater than

3.15 V) on the trigger output.

The CPU runs polling sequences to recognize the alarm state.

Board descriptionNortel Networks Confidential 2--9

S12000 BTS Reference Manual

48VDC/5VDC

Conversion

5VDC/12VDC

Isolated Conversion

+5Vdc +12VDC

isolated

Power supply

Reset logic

LEDs

Debug

PORT

Loopback

logic

CPU

io io

sci

@, data

/irq

Flash

EPROM SRAM

Memory Address

decoding

logic

Cabinet

reference

number

Control unit

A/D channels

Internal alarms

interface

Remote control

External alarms

interface

HDLC

controller

PCM

interface

SEL[4:7]

2PCMs

from/to

Cavities

2PCMs

from/to

CMCFs

48VDC

power supply

4 A/D inputs

4 remote

control outputs

88 internal

alarms

16 external

alarms

Alarms interface Communication

interface

Figure 2--4 RECAL board functional diagram

Board description Nortel Networks Confidential

2--10

PE/DCL/DD/0142

Unprotected external alarms

The RECAL board detects unprotected external alarms the same as the internal

alarms, which can be used inside the cabinet or within a few meters outside the

cabinet.

Protected external alarms

The RECAL board detects up to 16 protected external alarms. These alarms can be

used outside the cabinet by adding two ALPRO boards, which manage 8 alarms

each.

A closed loop forces a low logic level (0 mA) on the optocoupler collector,

indicating that there is no alarm. An open loop forces a high logic level (5 mA) on

the optocoupler collector, indicating that there is an alarm.

The operation is performed via the external remote commands (close/open relay)

accessible via the ALPRO box connected to the EXT. P. connector of the RECAL

board.

The EXT. P. (external protected alarm) connector provides pins ETC0A (pin17) and

ETC0B (pin18), both connected to an internal relay ETC0 within the RECAL board

(see Table 2--8).

2.2.1.2 Analog to digital inputs

The RECAL board reads four analog channels (voltage 0 to 5 V DC) that are

converted in digital signals by an eight--bits signal into a analog/digital converter.

2.2.1.3 Remote control outputs

Four remote control relay outputs are provided with a maximum current of 80 mA

and a maximum voltage of 72 V DC.

2.2.2 Physical description

This section describes the LEDs, connectors, and the electrical characteristics of the

RECAL board.

2.2.2.1 Front panel

The front panel of the RECAL board has the following:

One reset button

Three LEDs

Six connectors

The reset button allows a hard reset of the board.

Board descriptionNortel Networks Confidential 2--11

S12000 BTS Reference Manual

The front panel of the RECAL board is shown in Figure 2--5.

Board description Nortel Networks Confidential

2--12

PE/DCL/DD/0142

EXT. P.

INT.

PCM OUT

PWR

RESET

BIST

+5V

RDY

PCM

EXT. NP.

RECAL

Screws

Figure 2--5 RECAL board

Board descriptionNortel Networks Confidential 2--13

S12000 BTS Reference Manual

2.2.2.2 LEDs

There are three LEDs on the front panel of the RECAL board, described in

Table 2--3.

Type No. of

LEDs

Label

(color) Meaning (when lit)

Board state

indicators

1BIST (yellow) The built--in self--test is

running or is stopped with a

default result.

1+5 V (green) The power is on.

1RDY (green) The board is operating

normally.

Table 2--3 LEDs on the front panel of the RECAL board

Board description Nortel Networks Confidential

2--14

PE/DCL/DD/0142

2.2.2.3 Connectors

There are six connectors on the front panel of the RECAL board, which are wired

to corresponding connectors on left/right side of the board (see Figure 2--5)

Additionally, there are two connectors that are accessible only from inside the

board.

Access No. of

connectors Label Type Purpose

Front panel 1PCM SCSI 50--pin female PCM lines to and from the CBCF and

cabinet reference number. Wired to

the P4 connector soldered on the

inside of the board. The debug port

(P0) inside the board is connected to

the PCM connector.

1PWR Sub--D 3--pin male

Type 3W3

48 V DC Power supply input.

1PCM

Out

Sub--D 25--pin female PCM lines to and from cavities. Wired

to the P6 connector soldered on the

inside of the board.

1INT Sub--D high density

62--pin female

56 internal alarms (32 to 87). Wired

to the P3 connector soldered on the

inside of the board.

1EXT. P. Sub--D 50--pin female 16 external protected alarms and 4

remote control outputs. Wired to the

P5 connector soldered on the inside

of the board.

1EXT.NP. Sub--D 50--pin female 32 internal alarms (0 to 31) and 4

analog to digital conversion channels.

Wired to the P2 connector soldered

on the inside of the board.

Inside the

board

1P0 Sub--D 9--pin male Debugging port (the connector is not

equipped).

1P1 10--pin male EPLD Programming port, used in the

factory to program the EPLD.

Table 2--4 RECAL board connectors

Board descriptionNortel Networks Confidential 2--15

S12000 BTS Reference Manual

Pin connections

The pin connections and their significance are identified in Table 2--5 to

Table 2--12.

Pin no. Purpose Pin no. Purpose Pin no. Purpose

50 49 TXDBG

47 RXDBG 48 PCBUG0 46 GND

44 45 43 GND

41 GND 42 GND 40 GND

38 NSEL6 39 NSEL7 37 NSEL5

35 GND 36 NSEL4 34 NMICR1

32 NH4M 33 NMICR0 31 NMICE0

29 NMICE1 30 NSY 28

26 27 25

23 24 22

20 21 19

17 GND 18 GND 16 GND

14 SEL7 15 GND 13 SEL6

11 SEL4 12 SEL5 10 GND

8MICR0 9MICR1 7H4M

5SY 6MICE0 4MICE1

2 3 1

Legend:

H4M 4MHzclock

SY Frame synchronization signal

MICE Transmit PCM line

MICR Receive PCM line

GND Ground

SEL/NSEL Cabinet number selection

Table 2--5 PCM pin connections

Board description Nortel Networks Confidential

2--16

PE/DCL/DD/0142

Pin no. Purpose Pin no. Purpose

13 GND

25 NSY 12 SY

24 NH4M 11 H4M

23 NMICR1 10 MICR1

22 NMICR0 9MICR0

21 NMICE1 8MICE1

20 NMICE0 7MICE0

19 GND 6GND

18 GND 5GND

17 NSEL7 4SEL7

16 NSEL6 3SEL6

15 NSEL5 2SEL5

14 NSEL4 1SEL4

Legend:

H4M 4MHzclock

SY Frame synchronization signal

MICE Transmit PCM line

MICR Receive PCM line

GND Ground

Table 2--6 PCM--out pin connections

Board descriptionNortel Networks Confidential 2--17

S12000 BTS Reference Manual

Pin no. Purpose Pin no. Purpose Pin no. Purpose

42 GND 21 DALI87

62 DALI86 41 DALI85 20 DALI84

61 DALI83 40 DALI82 19 DALI81

60 DALI80 39 DALI79 18 GND

59 DALI78 38 DALI77 17 DALI76

58 DALI75 37 DALI74 16 DALI73

57 DALI72 36 DALI71 15 DALI70

56 DALI69 35 DALI68 14 DALI67

55 DALI66 34 GND 13 DALI65

54 DALI64 33 DALI63 12 DALI62

53 DALI61 32 DALI60 11 DALI59

52 DALI58 31 DALI57 10 DALI56

51 DALI55 30 DALI54 9DALI53

50 GND 29 DALI52 8DALI51

49 DALI50 28 DALI49 7DALI48

48 DALI47 27 DALI46 6DALI45

47 DALI44 26 DALI43 5DALI42

46 DALI41 25 GND 4DALI40

45 DALI39 24 DALI138 3DALI37

44 DALI36 23 DALI135 2DALI34

43 DALI33 22 GND 1DALI32

Legend:

DALI Internal Alarm Detection

GND Ground

Table 2--7 Internal pin connections

Board description Nortel Networks Confidential

2--18

PE/DCL/DD/0142

no. Purpose Pin

no. Purpose

50 33 MLC 17

49 ETC1B_ALPRO1 32 MLC 16 ETC1A_ALPRO1

48 +5V 31 ETC0A_ALPRO1 15 ETC0B_ALPRO1

47 +5V 30 14

46 ME_ALPRO1 29 DALE6_ALPRO1 13 DALE7_ALPRO1

45 ME_ALPRO1 28 DALE4_ALPRO1 12 DALE5_ALPRO1

44 ME_ALPRO1 27 DALE2_ALPRO1 11 DALE3_ALPRO1

43 ME_ALPRO1 26 DALE0_ALPRO1 10 DALE1_ALPRO1

42 ME_ALPRO1 25 9

41 MLC 24 ETC1A_ALPRO0 8ETC1B_ALPRO0

40 MLC 23 ETC0B_ALPRO0 7+5V

39 ETC0A_ALPRO0 22 6+5V

38 21 DALE7_ALPRO0 5ME_ALPRO0

37 DALE6_ALPRO0 20 DALE5_ALPRO0 4ME_ALPRO0

36 DALE4_ALPRO0 19 DALE3_ALPRO0 3ME_ALPRO0

35 DALE2_ALPRO0 18 DALE1_ALPRO0 2ME_ALPRO0

34 DALE0_ALPRO0 1ME_ALPRO0

Legend:

-- DALE: External alarm detection

-- ETC: Remote control emission

-- ME: External Mass (isolated from logic mass)

-- MLC: Common Logic Mass

Table 2--8 EXT. P pin connections

Board descriptionNortel Networks Confidential 2--19

S12000 BTS Reference Manual

Pin no. Purpose Pin no. Purpose Pin no. Purpose

50 GND 33 DALI 21 17 GND

49 DTA3 32 DALI 20 16 DALI 11

48 DTA2 31 DALI 19 15 DALI 10

47 GND 30 GND 14 DALI 9

46 DALI 31 29 DALI 18 13 GND

45 DALI 30 28 DALI 17 12 DALI 8

44 DALI 29 27 DALI 16 11 DALI 7

43 DALI 28 26 GND 10 DALI 6

42 GND 25 GND 9GND

41 DALI 27 24 DTA1 8DALI 5

40 DALI 26 23 DTA0 7DALI 4

39 DALI 25 22 GND 6DALI 3

38 GND 21 DALI 15 5GND

37 DALI 24 20 DALI 14 4DALI 2

36 DALI 23 19 DALI 13 3DALI 1

35 DALI 22 18 DALI 12 2DALI 0

34 GND 1GND

Legend:

DALI Internal Alarm Detection

GND Ground

Table 2--9 Ext. NP. pin connections

Pin no. Purpose

1(--) 48 V

2GND

3(+) 48 V

Table 2--10 PWR pin connections

Board description Nortel Networks Confidential

2--20

PE/DCL/DD/0142

Pin no. Purpose Pin no. Purpose

6 1 GND

7 2 RXDBG

8 3 TXDBG

9 4 PCBUG0

5GND

Table 2--11 P0 (Debug) pin connections

Pin no. Purpose Pin no. Purpose

1TCK 2GND

3TDO 4+5

5TMS 6

7 8

9TDI 10 GND

Table 2--12 P1 (EPLD JTAG) port pin connections

2.2.2.4 Electrical characteristics

The RECAL board is powered by a nominal 48 V DC. The nominal supply current

is approximately 600 mA.

A DC/DC converter (48 V to 5 V) on the board supplies logic circuits with +5 V

DC. The +5 V DC supply is available on the EXT.P external connector (and P5

internal connector) for the possible heating resistors mounted on the ALPRO

boards.

A second DC/DC isolated stages converter (5 V to 12 V) provides external alarm

detection circuits with +12 V DC isolated supply.

A EMC filter is designed on the board between 48 V DC input and the primary stage

of the DC/DC (48 V to 5 V) converter.

Its maximum consumption is 15 W.

Board descriptionNortel Networks Confidential 2--21

S12000 BTS Reference Manual

2.2.3 List of connected internal alarms

Connected internal alarms are the only internal alarms that can be used. The list of

alarms and the corresponding DALI pins (internal alarm detection) on the INT0

connector are identified in the following tables:

Table 2--13 – S12000 Indoor BTS (base and extension cabinets)

Table 2--15 – S12000 Outdoor BTS (base and extension cabinets)

REC

INT

arm

connector PIn

F--type converter High temperature Converter F0 DALI80 60

Behavior signal Converter F0 DALI81 19

High temperature Converter F1 DALI82 40

Behavior signal Converter F1 DALI83 61

Doors Door alarm DALI87 21

VSWR--meter VSWR0 Level 1 fault DALI33 43

VSWR0 Level 2 fault DALI34 2

VSWR0 Level 3 fault DALI35 23

VSWR1 Level 1 fault DALI37 3

VSWR1 Level 2 fault DALI38 24

VSWR1 Level 3 fault DALI39 45

VSWR2 Level 1 fault DALI41 46

VSWR2 Level 2 fault DALI42 5

VSWR2 Level 3 fault DALI43 26

VSWR3 Level 1 fault DALI45 6

VSWR3 Level 2 fault DALI46 27

VSWR3 Level 3 fault DALI47 48

VSWR4 Level 1 fault DALI49 28

VSWR4 Level 2 fault DALI50 49

VSWR--meter VSWR4 Level 3 fault DALI51 8

VSWR5 Level 1 fault DALI53 9

VSWR5 Level 2 fault DALI54 30

VSWR5 Level 3 fault DALI55 51

VSWR6 Level 1 fault DALI57 31

Board description Nortel Networks Confidential

2--22

PE/DCL/DD/0142

Origin RECAL INT

connector PIn

DALIAlarm

Origin RECAL INT

connector PIn

DALIAlarm

VSWR6 Level 2 fault DALI58 52

VSWR6 Level 3 fault DALI59 11

VSWR7 Level 1 fault DALI61 53

VSWR7 Level 2 fault DALI62 12

VSWR7 Level 3 fault DALI63 33

VSWR8 Level 1 fault DALI65 13

VSWR8 Level 2 fault DALI66 55

VSWR8 Level 3 fault DALI67 14

VSWR9 Level 1 fault DALI69 56

VSWR9 Level 2 fault DALI70 15

VSWR9 Level 3 fault DALI71 36

VSWR10 Level 1 fault DALI73 16

VSWR10 Level 2 fault DALI74 37

VSWR10 Level 3 fault DALI75 58

VSWR11 Level 1 fault DALI77 38

VSWR11 Level 2 fault DALI78 59

VSWR11 Level 3 fault DALI79 39

LNA LNA0 fault DALI32 1

LNA1 fault DALI36 44

LNA2 fault DALI40 4

LNA3 fault DALI44 47

LNA4 fault DALI48 7

LNA5 fault DALI52 29

LNA6 fault DALI56 10

LNA7 fault DALI60 32

LNA8 fault DALI64 54

LNA9 fault DALI68 35

LNA10 fault DALI72 57

LNA11 fault DALI76 17

Board descriptionNortel Networks Confidential 2--23

S12000 BTS Reference Manual

Origin RECAL INT

connector PIn

DALIAlarm

Origin RECAL INT

connector PIn

DALIAlarm

Blower Blower_ALA1 DALI84 20

Blower_ALA2 DALI85 41

Blower_ALA3 DALI86 62

Table 2--13 List of alarms and INT0 connector DALIs

(S12000 Indoor BTS, base and extension cabinets)

The values of this table correspond to the static wiring scheme between COMICO

and RECAL.

In function of the configuration and of the BTS cabling, the logical value associated

to the origin of alarms can be different from the static value.

For example, the following table gives the correspondence between static values

and logical values for the 3H4D+RxF S444 an 3 H4D S012 configuration.

Static Values 3 H4D+RxF S444 3 H4D S012 DALI

LNA0 X X

VSWR0 Level 1 fault X X

VSWR0 Level 2 fault X X

VSWR0 Level 3 fault X X

LNA1 LNA0 LNA0 DALI36

VSWR1 Level 1 fault VSWR0 Level 1 fault VSWR0 Level 1 fault DALI37

VSWR1 Level 2 fault VSWR0 Level 2 fault VSWR0 Level 2 fault DALI38

VSWR1 Level 3 fault VSWR0 Level 3 fault VSWR0 Level 3 fault DALI39

LNA2 X X

VSWR2 Level 1 fault X X

VSWR2 Level 2 fault X X

VSWR2 Level 3 fault X X

LNA3 LNA1 LAN1 DALI44

VSWR3 Level 1 fault VSWR1 Level 1 fault VSWR1 Level 1 fault DALI45

VSWR3 Level 2 fault VSWR1 Level 2 fault VSWR1 Level 2 fault DALI46

VSWR3 Level 3 fault VSWR1 Level 3 fault VSWR1 Level 3 fault DALI47

LNA4 X X

Board description Nortel Networks Confidential

2--24

PE/DCL/DD/0142

Static Values DALI3 H4D S0123 H4D+RxF S444

VSWR4 Level 1 fault X X

VSWR4 Level 2 fault X X

VSWR4 Level 3 fault X X

LNA5 LNA2 LNA2 DALI52

VSWR5 Level 1 fault VSWR2 Level 1 fault VSWR2 Level 1 fault DALI53

VSWR5 Level 2 fault VSWR2 Level 2 fault VSWR2 Level 2 fault DALI54

VSWR5 Level 3 fault VSWR2 Level 3 fault VSWR2 Level 3 fault DALI55

LNA6 X X

VSWR6 Level 1 fault X X

VSWR6 Level 2 fault X X

VSWR6 Level 3 fault X X

LNA7 LNA7 X60

VSWR7 Level 1 fault X X

VSWR7 Level 2 fault X X

VSWR7 Level 3 fault X X

LNA8 X X

VSWR8 Level 1 fault X X

VSWR8 Level 2 fault X X

VSWR8 Level 3 fault X X

LNA9 LNA9 X68

VSWR9 Level 1 fault X X

VSWR9 Level 2 fault X X

VSWR9 Level 3 fault X X

LNA10 LNA11 X72

VSWR10 Level 1 fault X X

VSWR10 Level 2 fault X X

VSWR10 Level 3 fault X X

LNA11 X X

VSWR11 Level 1 fault X X

VSWR11 Level 2 fault X X

VSWR11 Level 3 fault X X

Table 2--14 Example of alarm affectation in function of S12000 Indoor configuration

Board descriptionNortel Networks Confidential 2--25

S12000 BTS Reference Manual

Note: An X in a column indicates that the alarm is not used with a particular

configuration

REC

INT

arm

connector PIn

F--type converter High temperature Converter F0 DALI80 60

Behavior signal Converter F0 DALI81 19

High temperature Converter F1 DALI82 40

Behavior signal Converter F1 DALI83 61

Doors Door alarm DALI87 21

VSWR--meter VSWR0 Level 1 fault DALI77 43

VSWR0 Level 2 fault DALI78 2

VSWR0 Level 3 fault DALI79 23

VSWR1 Level 1 fault DALI73 3

VSWR1 Level 2 fault DALI74 24

VSWR1 Level 3 fault DALI75 45

VSWR2 Level 1 fault DALI69 46

VSWR2 Level 2 fault DALI70 5

VSWR2 Level 3 fault DALI71 26

VSWR3 Level 1 fault DALI65 6

VSWR3 Level 2 fault DALI66 27

VSWR3 Level 3 fault DALI67 48

VSWR4 Level 1 fault DALI61 28

VSWR4 Level 2 fault DALI62 49

VSWR--meter VSWR4 Level 3 fault DALI63 8

VSWR5 Level 1 fault DALI57 9

VSWR5 Level 2 fault DALI58 30

VSWR5 Level 3 fault DALI59 51

VSWR6 Level 1 fault DALI53 31

VSWR6 Level 2 fault DALI54 52

VSWR6 Level 3 fault DALI55 11

VSWR7 Level 1 fault DALI49 53

VSWR7 Level 2 fault DALI50 12

Board description Nortel Networks Confidential

2--26

PE/DCL/DD/0142

Origin RECAL INT

connector PIn

DALIAlarm

Origin RECAL INT

connector PIn

DALIAlarm

VSWR7 Level 3 fault DALI51 33

VSWR8 Level 1 fault DALI45 13

VSWR8 Level 2 fault DALI46 55

VSWR8 Level 3 fault DALI47 14

VSWR9 Level 1 fault DALI41 56

VSWR9 Level 2 fault DALI42 15

VSWR9 Level 3 fault DALI43 36

VSWR10 Level 1 fault DALI37 16

VSWR10 Level 2 fault DALI38 37

VSWR10 Level 3 fault DALI39 58

VSWR11 Level 1 fault DALI33 38

VSWR11 Level 2 fault DALI34 59

VSWR11 Level 3 fault DALI35 39

LNA LNA0 fault DALI76 1

LNA1 fault DALI72 44

LNA2 fault DALI68 4

LNA3 fault DALI64 47

LNA4 fault DALI60 7

LNA5 fault DALI56 29

LNA6 fault DALI52 10

LNA7 fault DALI48 32

LNA8 fault DALI44 54

LNA9 fault DALI40 35

LNA10 fault DALI36 57

LNA11 fault DALI32 17

Blower Cooler_0 DALI84 20

Cooler_1 DALI85 41

Hood_Alarm DALI86 62

Table 2--15 List of alarms and INT0 connector DALIs

(S12000 Outdoor BTS, base and extension cabinets)

Board descriptionNortel Networks Confidential 2--27

S12000 BTS Reference Manual

2.2.4 List of unprotected external alarms

The following pins on the INT1 connector can be used to receive up to

32 unprotected external alarms:

DALI 0 to DALI 20

MLC

The above pins presently are not used in the S12000 Indoor BTS.

Table 2--16 identifies the DALIs in the S12000 Outdoor BTS.

Origin Alarm DALI number

AC MAIN ALARM Main breaker DALI 0

SURGE ALARM Surge fail DALI 1

AC--DC RECTIFIERS

AC fault DALI 2

RMS DC fault DALI 3

Over temperature DALI 4

Load1 threshold DALI 5

PCU protective devices DALI 6

Battery on discharge DALI 7

USER ALARMS User 1 DALI 8

User 2 DALI 9

User 3 DALI 11

User 4 DALI 12

User 5 DALI 13

BATTERY BREAKER

ALARM

Disconnected battery DALI 14

EXTERNAL BATTERY

Thermal fault DALI 15

RM DC breaker fault DALI 16

Door open DALI 17

AC breaker fault DALI 18

Surge DALI 19

Spare DALI 20

Not used DALI 21

Not used DALI 22 to DALI 24

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Origin DALI numberAlarm

Not used DALI 25 to DALI 27

Not used DALI 28 to DALI 31

Table 2--16 Unprotected external alarms

(S12000 Outdoor BTS, base and extension cabinets)

Board descriptionNortel Networks Confidential 2--29

S12000 BTS Reference Manual

2.3 ALPRO board

The ALPRO board protects up to eight external alarms and up to two remote

controls of the RECAL board.

2.3.1 Principle

The external alarms and remote controls are intended to be connected to equipment

outside the cabinets. This equipment may be connected, temporarily or

permanently, to outside line conductors affected by electrical disturbances. The

ALPRO board protects against these disturbances.

One ALPRO board protects half of the external interfaces available in the RECAL

board. There may therefore be two ALPRO boards for one RECAL board.

Depending on how many external alarms are used, one or two ALPRO boards may

be installed.

2.3.2 Description

The ALPRO board (see Figure 2--6 presented in S12000 Outdoor configuration)

provides only secondary protection. Primary protection devices are associated with

the board to protect the lines themselves. A cable linking the board ground to a

cabinet ground bar discharges energy caused by outside disturbances.

2.3.2.1 External alarm protection circuit

The first part of the external alarm protection circuit comprises a surge arrestor and

thermal resistors, which protect the board against power surges and limit the current

in wires and connectors.

The second part limits the voltage and current returning to the RECAL board. It

consists of transils and thermal resistors.

2.3.2.2 Remote control protection circuit

The first part of the remote control protection circuit comprises a surge arrestor and

thermal resistors, which protect the board against power surges and limit the current

in wires and connectors.

The second part protects the relays and connections of the RECAL board. It consists

mainly of thermal resistors.

2.3.3 S12000 Outdoor BTS environmental conditions

The ALPRO board is located in a sealed environment inside the skirting of the

cabinet. It is designed to operate at temperatures between --40°C(--40°F) and +80°C

(176°F).

Two thermoresistors supplied with +5 V prevent condensation inside the case of the

ALPRO card.

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NORTEL

Figure 2--6 ALPRO board

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S12000 BTS Reference Manual

2.3.4 S12000 Indoor BTS environmental conditions

ALPRO modules are located at the top of the radio cabinet. The precise location is

presented on the overview figure.

2.3.5 Connectors

The ALPRO board has three connectors:

A 25--pin male connector connects the ALPRO board to the RECAL board:

Pin no. Purpose Pin no. Purpose

14 DALE0 1ME

15 ME 2DALE1

16 DALE3 3DALE2

17 DALE4 4ME

18 ME 5DALE5

19 DALE7 6DALE6

20 7ME

21 +5 V 8

22 ETC0B 9ETC0A

23 MLC 10 +5 V

24 ETC1B 11 ETC1A

25 12 MLC

Legend:

ETC Remote Control

DALE External Alarm Protected Detection

ME External ground

Table 2--17 ALPRO 25--pin connections

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Two 10--pin connectors connect the ALPRO board to the external alarms:

Connector J1 Connector J2

1TC0A 1NALE4

2TC0B 2PALE4

3TC1A 3NALE3

4TC1B 4PALE3

5NALE7 5NALE2

6PALE7 6PALE2

7NALE6 7NALE1

8PALE6 8PALE1

9NALE5 9NALE0

10 PALE5 10 PALE0

Table 2--18 ALPRO 10--pin connections

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S12000 BTS Reference Manual

2.4 F--type converter

2.4.1 Principle

The F--type converter converts a 48 V DC voltage into two power sources, --15 V

and +15 V. It powers the radio equipments such as the Low Noise Amplifiers

(LNA), the variable gain amplifiers and the VSWR measuring devices.

2.4.2 Description

The F--type converter has a switch on its front panel that can be used to disconnect

the input voltage. It also has two outputs that can be connected in parallel with

identical outputs of another F--type converter.

2.4.2.1 Input voltage

Nominal input voltage: 48 V (40.5 V to 57 V)

2.4.2.2 Output voltages

The two output voltages supplied by the converter are as follows:

Source 1:

Nominal voltage: +15 V Nominal current: 7 A

Source 2:

Nominal voltage: --15 V Nominal current: 4 A

Output voltages can be individually adjusted up to +15% and --5% of nominal

voltage.

2.4.2.3 Alarms

Several alarm signals can be generated, in the following cases:

One of the two output voltages is either lower than the Low Voltage Limit (LVL)

or higher than the High Voltage Limit (HVL). These limit voltages are:

•

LVL: 13.25 V ±0.25 V

•

HVL: 18.5 V ±0.5 V

The switch on the front panel is set to “OFF”.

The converter temperature is too high.

Finally, an event alarm is generated when there is a logic OR between the other

alarms.

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2.4.3 Front panel

The F--type converter front panel has several connectors and LEDs (see

Figure 2--7).

2.4.3.1 LEDs

Two green LEDs provide information on the status of the converter.

2.4.3.2 Connectors

Two connectors are on the front panel of the converter:

A female, Sub--D, 15--pin connector supplies output voltages and alarm signals.

A male, 3W3, Sub--D connector receives input voltages.

1GND

215 V alarm

3Switch “OFF” alarm

4High temperature alarm

5GND

6-- 1 5 V a l a r m

7GND

8Event alarm

9GND

10 GND

11 15 V

12 15 V

13 -- 1 5 V

14 -- 1 5 V

15 GND

Table 2--19 Output voltages and alarm signals connector

1-- 4 8 V

2Mechanical ground

3+48 V

Table 2--20 Input voltages connector

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S12000 BTS Reference Manual

Test points

LEDs

Switch

Power in

Power

out/alarms

Screws

--15V

+15V

Figure 2--7 F--type converter

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2.5 RF Combiner

2.5.1 Principle

There are three types of RF Combiner modules:

duplexer--only (D)

hybrid two--way duplexer (H2D)

hybrid four--way duplexer (H4D)

The functional diagrams of each RF Combiner type are shown in Figure 2--8.

Table 2--21 describes the components in each type of RF Combiner module.

RF Combiner Type Contents

D-- Duplexer

-- Reception Amplifier (LNA splitter)

-- VSWR Meter (optional)

H2D -- Duplexer

-- Reception Amplifier (LNA splitter)

wo--way transm

on coup

(H2D)

-- VSWR Meter (optional)

H4D -- Duplexer

-- Reception Amplifier (LNA splitter)

-- Four--way transmission coupling

(H4D)

-- VSWR Meter (optional)

Table 2--21 Content of RF Combiner modules

2.5.1.1 Duplexer

The duplexer allows transmission and reception to occur on the same antenna. This

reduces the number of antennas required for a cabinet. The duplexer also performs

filtering for reception and transmission.

When no receive filtering or transmit coupling is required, then the Tx--Filter (TxF)

module can be used instead of the duplexer.

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S12000 BTS Reference Manual

Offset Offset

Duplexer LNA--splitter

+/--

LNA

-- 2 d B

Ext 0

Ext 1

Int 0

Int 1

RX in

TX in

RF combiner

Power supply and

three alarms

Antenna

Envelope

detector

VSWR

meter

RX--splitter

From

PAs

Figure 2--8 Duplexer--only (D) RF Combiner diagram

Board description Nortel Networks Confidential

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PE/DCL/DD/0142

Offset Offset

Duplexer LNA--splitter

+/--

LNA

-- 2 d B

Ext 1

Ext 2

Int 1

Int 2

RX in

TX in

50 Ω

PA in 1

PA in 2

RF combiner

TX out

Power supply and

three alarms

Antenna

Hybrid coupler

Envelope

detector

VSWR

meter

RX--splitter

Frw

Reverse

Forward

From

e--PAs

Figure 2--9 H2D RF Combiner diagram

Board descriptionNortel Networks Confidential 2--39

S12000 BTS Reference Manual

Offset Offset

Duplexer LNA--splitter

+/--

LNA

-- 2 d B

Ext 0

Ext 1

Int 0

Int 1

RX in

TX in

50 Ω

PA in 1

PA in 2

RF combiner

Power supply and

three alarms

Antenna

Envelope

detector

VSWR

meter

50 Ω

PA in 3

PA in 4

TX out

Hybrid

coupler

Hybrid coupler

RX--splitter

From

PAs

Figure 2--10 H4D RF Combiner diagram

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2.5.1.2 Reception amplifier

The reception signal amplifier, also called the LNA--splitter, has two functions:

amplifies the signal from the antenna using a Low Noise Amplifier (LNA)

splits the signal from the antenna into four signals

The LNA--splitter has the following attenuation or gain values:

The LNA has a nominal gain of 28.5 dB (GSM 850) and 32 dB (GSM 1900).

The two splitter stages cause attenuation less than 7 dB.

A 2 dB attenuator handles differences in cable attenuation between the two

extension outputs (EXT) and the two internal outputs (INT). The two extension

outlets, which are not used at present, will make future configuration upgrades

possible.

The LNA--splitter is supplied with ±15 V DC (±5%) and its maximum current

consumption is 370 mA (+ 15 V), 50 mA (-- 15 V). The module generates an alarm

if LNA consumption deviates by more than 30% from the nominal value.

On the front of the LNA--splitter board, there is a 9--pin male connector whose pin

connection is as follows:

1-- 1 5 V

20V

3Alarm

4Not used

5+15V

60V

70V

8Not used

9+15V

Table 2--22 Amplifier pin connections

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S12000 BTS Reference Manual

2.5.1.3 Hybrid transmission coupling

According to the hybrid coupling type, transmission coupling consists of a single

hybrid coupler for H2D configurations or three hybrid couplers mounted in two

stages for H4D configurations.

The two--way hybrid coupler (H2D) consists of:

two isolators, one at each input port, which allows the protection of the Power

Amplifier (PA) against reflected signals, and also permits the isolation necessary

between transmitters.

a hybrid coupler, which combines two transmission signals on only one port.

This subsystem is part of the RF Combiner module (H2D, or H4D).

The maximum attenuation is an RF Combiner module is dedicated to one frequency

band.

When any transmission coupling system is requested (in the case of one TRX per

antenna), the Tx--Filter (Tx--F) module can be used with two duplexer--only (D)

modules in order to provide Rx main and diversity signals.

The Tx--Filter module is dedicated to one frequency band.

Refer to Paragraph 2.6 “Tx--Filter module” on page 2--48 for information about the

Tx--Filter.

2.5.1.4 VSWR--meter

The VSWR--meter can be included as an optional unit in the RF Combiner module

or in the Tx--Filter module.

The VSWR--meter allows the signal strength of the voltage standing wave ratio

(VSWR) to be monitored on the antenna connector and to verify the connection

between the antenna and the BTS. This module needs BTS signals transmission to

be able to switch on (no alarm with “Receive antenna” only)

The VSWR--meter receives transmitted and reflected signals sampled through two

directional antennas located inside the duplexer unit or Tx--Filter unit.

The transmit and receive signals are first converted into two DC voltages by using

envelope detection. Two logarithmic amplifiers, one for transmit power signal, and

one for reflected power signal, then amplify both converted signals.

The two channels are added and subtracted to obtain the stationary wave ratio. This

value is compared to three thresholds (1.7:1, 2:1, and 3:1), each of which triggers

an alarm if it is exceeded.

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2.5.2 RF Combiner front panels

The front panels of the RF Combiner types are shown in Figure 2--11

to Figure 2--13.

2.5.2.1 Duplexer

The duplexer connectors on the front panel of the RF Combiner are:

a female 7/16 antenna connector

a female N type transmission connector

a female, SMA type connector (Rev)

a female, SMA type connector (Fwd)

A female, SMA type reception connector is present at the rear of the duplexer.

2.5.2.2 LNA--splitter

The connectors on the LNA--splitter front panel are:

two female, SMA type, output (EXT) connectors to the RX--splitter of the

extension rack

two female, SMA type, RX--splitter output (INT) connectors

a male, 9--pin power supply connector

A female, SMA type, radio signal input connector is present at the rear of the

LNA--splitter.

2.5.2.3 Transmission coupling

For duplexer--only configurations, the transmission signal input connector on the

front panel is a female, N type connector (TX--in). Duplexer Tx input is described

hereafter.

For H2D configurations, the connectors on the front panel are:

two female, N type, transmission signal input connectors (PA in)

a female, N type, output connector (TX--out)

a female, N type input connector (TX--in). Duplexer Tx input is described

hereafter

Board descriptionNortel Networks Confidential 2--43

S12000 BTS Reference Manual

Int_0 Int_1 Ext_1Ext_0

FwdAntenna

Pwr/

Alarm

TX_in

Rev

VSWR

Fwd

Rev

Pwr/

Alarm

Cables always provided

with VSWR meter

Screws

Figure 2--11 Duplexer--only (D) RF Combiner

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Pwr/Alarm

Int_0 Int_1 Ext_1Ext_0

FwdAntenna

Pwr/

Alarm

TX_in

PA_in PA _in TX_out

Rev

VSWR

Fwd

Cables always provided

with VSWR meter

Rev

Screws

Figure 2--12 Two--way hybrid duplexer (H2D) RF Combiner

Board descriptionNortel Networks Confidential 2--45

S12000 BTS Reference Manual

Pwr/

Rev

Pwr/Alarm

Int_0 Int_1 Ext_1Ext_0

FwdRevAntenna

TX_in

TX_out

PA_in PA_in

Alarm

VSWR

Fwd

Screws

Cables always provided

with VSWR meter

Figure 2--13 Four--way hybrid duplexer (H4D 1800/900 Mhz) RF Combiner

Board description Nortel Networks Confidential

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PE/DCL/DD/0142

Pwr/

Rev

Pwr/Alarm

Int_0 Int_1 Ext_1Ext_0

FwdRevAntenna

TX_in

TX_out

PA_in PA_in

Alarm

VSWR

Fwd

Screws

Figure 2--14 Four--way hybrid duplexer (H4D 850/1900 MHz) RF Combiner

Board descriptionNortel Networks Confidential 2--47

S12000 BTS Reference Manual

For H4D configurations, the connectors on the front panel are:

four female, N type, transmission signal input connectors (PA--in)

a female, N type, output connector (Tx--out)

a female, N type, input connector (Tx--in). Duplexer Tx input is described

hereafter.

2.5.2.4 VSWR--meter

The connectors on the VSWR--meter front panel are:

a female, SMA type, reflected power connector (Rev)

a female, SMA type, transmitted power connector (Fwd)

a male 9--pin, sub--D connector for power supply and alarms, with the following

pin connection:

1-- 1 5 V

20V

3Alarm 1

4Alarm 2

5+15V

60V

70V

8Alarm 3

9+15V

Table 2--23 VSWR pin connections

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2.6 Tx--Filter module

The purpose of the Tx--Filter (Tx--F) is to filter the transmitted signal and to protect

the power amplifier (PA). The Tx--F does not contain a transmission coupling

system or a receiver filter.

The Tx--Filter module is composed of (see Figure 2--15):

a transceiver filter unit

a coupling system dedicated to the VSWR--meter

an optional VSWR--meter that monitors the link between the BTS and the

antenna.

The Tx--Filter module is used with the duplexer--only RF Combiner (D) to extend

configurations beyond two DRXs per cell. The Tx--Filter does not perform

reception functions and must be used with the RF Combiner (D) to ensure reception

distribution.

The Tx--Filter module can be equipped with an optional VSWR--meter which shares

the same front panel so that there is only one unit to plug into the BTS rack.

With or without the optional VSWR--meter, the Tx--Filter module is half the size

of the two--way hybrid (H2D) and duplexer--only (D) RF Combiner.

2.6.1 VSWR--meter

The function of the VSWR--meter (see Figure 2--16) is described in the section

“RF Combiner”.

The VSWR--meter connectors on the front panel of the Tx--Filter are the same as

those of the RF Combiner and are described in the section “RF Combiner

connectors”.

Although the VSWR--meter delivers three alarm lines, only two are reported to the

OMC--R because of COMICO constraints.

These alarm thresholds correspond to 2:1 and 3:1 VSWR values.

Board descriptionNortel Networks Confidential 2--49

S12000 BTS Reference Manual

PA_IN

Test

loop Fwd Rev Rev Fwd Pwr/Alarm

Antenna

Screws

Figure 2--15 Tx--Filter (Tx--F) module

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PE/DCL/DD/0142

VSWR--meter

TX in (from PA)

Antenna

3Alarms

Optional

Forward Reverse

Figure 2--16 Tx--Filter (Tx--F) functional diagram

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S12000 BTS Reference Manual

2.7 Compact BCF (CBCF) module

This section provides a functional and physical description of the CBCF Module

and of the following CBCF Module boards:

CPCMI

CMCF Phase2

BCFICO

CBP

POWER ICO

2.7.1 Functional description

The CBCF Module performs functions common for a site and also manages its

alarm management unit, the RECAL board.

The base common functions of the BTS are performed by two main CBCF Module

boards: the CMCF and the CPCMI.

The CMCF Phase2 board performs the concentration, switching, and

synchronization functions of the BTS. The CPCMI board ensures the interface

between the external PCMs of the A--bis interface and the internal private PCMs.

Private PCM links connect the CBCF (via the CMCF) to the other BTS components.

The CBCF also uses private PCMs for internal communication between CBCF

boards.

The boards and their functions are identified in Table 2--24.

Board* Function Quantity

CPCMI ABIS double PCM link interface 1to3

CMCF

Phase2

Concentration, routing, and synchronization 1or2

BCFICO Interconnection between the CPCMI, CMCF

Phase2

boards and external communication links

CBP Interconnection between CPCMI, CMCF, and BCFICO

boards

* Legend:

CPCMI Compact PCM Interface CMCF Compact Main Common Functions

BCFICO Base Common Functions Interconnection CBP CBCF Back Panel

Table 2--24 CBCF module boards

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2.7.2 Physical description

Although the CBCF Module boards are fitted into a compact module, the CMCF,

CPCMI, and BCFICO boards can be accessed from the front panel and replaced.

The aim is to reduce the number of boards, to take advantage of the new

technologies and to reach a high level of integration to allow software updating from

OMC without any intervention on the site.

Figure 2--17 show the CBCF module front panel.

Board descriptionNortel Networks Confidential 2--53

S12000 BTS Reference Manual

Figure 2--17 S12000 BTS: CBCF module

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2.7.3 CPCMI Board

2.7.3.1 S12000 CPCMI board

Depending on the requirements, the CBCF Module can contain one to three CPCMI

boards.

This Compact PCM interface board handles two PCMs. Both PCMs can be used for

the system Clock of the BTS.

2.7.3.2 Functional description

The CPCMI board ensures the interface between the external PCMs of the A--bis

interface and the internal private PCMs. This interfacing task corresponds to an

electrical level translation and a frame format conversion depending on the kind of

A--bis link (PCM E1/T1 or HDSL).

There are two types of CPCMI boards available used in accordance with the type

of A--bis interface:

CPCMI--E1

CPCMI--T1

The core of each board is generic and common to all, but each uses a different line

interface.

The CPCMI uses the n+1 redundancy scheme depending on:

the number of required TSs

the drop and insert scheme

the number of CPCMIs present in the package (three maximum)

The functional characteristics of the E1 and T1 boards are summarized in

Table 2--25.

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S12000 BTS Reference Manual

The functional diagram of the CPCMI is shown in Figure 2--18.

Function CPCMI-- E1 CPCMI--T1

Reception gain adaptation X X

Extraction of the binary rate for transmission to

the CMCF

X X

Reception and transmission buffer on two

frames to allow frame alignment

X X

Transmission alignment on the CMCF clock X X

Management of frame loss or doubling X X

Management of alarms, signalling, and loop

control

X X

Switch configuration for 120 Ohms or 75 Ohms X

Compliant with Recommendation G703 (HDB3

line coding)

Compliant with the G823--G824 standard (jitter

permitted)

CRC4 Management X

Adaptation of transmission to the cable length X

Compliant with ANSI T1.403 and T1.102 (B8ZS

coding)

Management of frame format (SF or ESF) X

CRC6 Management (for ESF) X

Alignment of external T1 PCM rate and internal

E1 PCM rate

Table 2--25 Functions of CPCMI--E1 and CPCMI--T1 boards

Synchronization

The timing signal is extracted from the PCM clock and sent to the CMCF (RCLK).

The local time is sent to the CMCF if there is no PCM timing signal (RCLK =

HLOC).

The CMCF selects one signal from the six received (one per PCM link) and

redistributes it as a reference for all A--bis transmissions (TCLK). This signal is also

the long term reference used to create the H4M timing reference.

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Line interface Transceiver Drivers

HDLC controllerEPLD

FEPROM

SRAM

Interface LEDs

Configuration

switch

TransceiverLine interface

Processing

unit

Reset logic

TEI register

Debug

interface

E1/T1

Drivers

TEI

CMCFA--bis

Transmission clock

PCM0 reception

clock

Local clock

PCM1 reception

clock

Local clock

Private

PCM0

Private

PCM1

E1 or T1

PCM0

E1 or T1

Figure 2--18 CPCMI board functional diagram

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2.7.3.3 Physical description

Processing Unit

The CPCMI processing unit has a rate of 4 MHz derived from a 16 MHz external

oscillator. It has a 128 Kbytes RAM capacity and a 16 Mbytes FEPROM capacity.

O&M communication occurs using a LAP--D on TS0 of the private PCM MIC0.

Front panel

The front panel contains the following:

one Reset button

ten LEDs

eight connectors

The CPCMI board is shown in Figure 2--19.

LEDs

The LEDs used on the front panel of the CPCMI board are described in Table 2--26.

Type No. of

LEDs

Label

(color) Meaning (when lit)

Board state

indicators

1BIST (yellow) The built--in self--test is

running or is stopped with a

default result.

1+5 V (green) The power is on.

1RDY (green) The board is operating

normally.

State indicators of

the external PCM

(

)

1SKP (red) The FIFO skip indicator is

commontobothPCMs.

link (

-- b i s ) 2LFA (red) The frame alignment is lost.

One LFA per PCM link.

2RRA (red) The receive remote alarm.

One RRA per PCM link.

2NOS (red) There is no signal. One NOS

per PCM link.

Table 2--26 LEDs on the front panel of the CPCMI board

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Screw

P13

P11

P10

Figure 2--19 CPCMI board

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S12000 BTS Reference Manual

The next table defines the relation between the PCM alarms and the front LED

status.

According to the priority order, when the simultaneous alarms are detected, only the

alarm with the highest priority is declared active.

PCM alarms CPCMI LEDs

Definition Priority NOS RRA LFA

LOS:

Loss Of Signal 1 (high) ON OFF OFF

AIS: Alarm Indication Signal 2ON ON ON

LFA:

Loss of Frame Alignment 3OFF OFF ON

FE:

Frame Error 4ON ON OFF

CRC:

loss of multi--frame

alignment

5OFF ON ON

RAI: Remote Alarm

Indication

6(low) OFF ON OFF

2.7.3.4 Switches

The switches are used to configure the following board characteristics:

cable length

line build out

line coding mode

framing mode

Fs/dl feature

The position of each switch is shown on Figure 2--20

Board description Nortel Networks Confidential

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P10

ON (1)

CRC/RES

AMI/B8ZS

FSDL

LS2

LS1

LS0

MT1

MT0

PCM1

OFF (0)

CRC/RES

AMI/B8ZS

FSDL

LS2

LS1

LS0

MT1

MT0

PCM0

OFF (0)

ON (1)

120 Ω

75 Ω

P13

P11

Figure 2--20 CPCMI board: hardware switches

The next tables summarize the settings of each switch of CPCMI board.

S3 switch:

S3 switch T1 type E1 type

(0:3) -- =120: PCM1 120 Ω

=75: PCM1 75 Ω

(4:7) -- =120: PCM0 120 Ω

=75: PCM0 75 Ω

Table 2--27 CPCMI board: S3 switch

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S1andS2switches:

S1 and S2 switches T1 board E1 board

MT1 MT0 Framing

mode CRC mode Framing

mode

CRC

mode

0 0 F4

not available -- -- --

0 1 SF (or D4)

frame none single frame none

1 0 ESF frame see

CRC/RES multi--frame CRC4

1 1 F72

not available -- -- --

S1 and S2 switches T1 board E1 board

LS2 LS1 LS0

Cable length

Line Build Out

000 0 to 133 feet / 0dB

(0 to 40.58 meters) --

001 133 to 266 feet

(40.58 to 81.08 meters) --

010 266 to 399 feet

(81.08 to 121.61 meters) 75 Ω

011 399 to 533 feet

(121.61 to 162.46 meters) 120 Ω

100 533 to 655 feet

(162.46 to 199.64 meters) 120 Ω

101 -- 7 . 5 d B --

110 --15.0 dB 120 Ω

111 --22.5 dB --

S1 and S2 switches T1 board E1 board

FSDL =0 : FS/DL disabled

=1 : FS/DL enabled --

AMI/B8ZS =0 : AMI line coding

=1 : B8ZS line coding --

CRC/RES

=0 : CRC decoding

disabled

=1 : CRC decoding

enabled

Table 2--28 CPCMI board: S1 and S2 switches

Board description Nortel Networks Confidential

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2.7.3.5 Connectors

The CPCMI uses 12 connectors accessed from the following locations:

on the front panel (8)

inside the board (4)

The connectors are identified in the table below.

Access No. of

connectors Label Type Purpose

Front panel 2XL0 Transmission connectors for PCM0.

(0) LP0 A closed loop connection used for

testing is attained by using one XL0

and one RL0 connectors.

2RL0 Reception connectors for PCM0.

2XL1 Transmission connectors for PCM1

(0) LP1 A closed loop connection used for

testing is attained by using one XL1

and one RL1 connectors.

2RL1 Reception connectors for PCM1.

Inside the

board

1P10

(Debug)

Sub--D 9--pin male Debugging connector that is only

available during tests.

1P9 (JTAG) HE10 10--pin male JTAG programming port used to

program the EPLP prior to product

delivery.

1P11 Millipack1 60--pin

female

Used for signals during nominal

operation. This connector is plugged

into the CBP.

1P13

(POWER)

Millipack 1 Power supply input. In this five--row

connector, only rows A, C, and E are

equipped with a power signal. The

rows are staggered to allow the

ground connection. This connector is

plugged into the CBP.

Table 2--29 CPCMI board connectors

Board descriptionNortel Networks Confidential 2--63

S12000 BTS Reference Manual

Pin connections

The pin connections and their significance for the CPCMI connectors are identified

in Table 2--30 to Table 2--33.

no.

Row E

Purpose

no.

Row D

Purpose

no.

Row C

Purpose

no.

Row B

Purpose

no.

Row A

Purpose

12 H4M 12 MICE0 12 MICR0 12 MICE1 12 MICR1

11 NH4M 11 NMICE0 11 NMICR0 11 NMICE1 11 NMICR1

10 SY 10 HLOC 10 10 10

9NSY 9NLOC 9PSYT0 9PSYT1 9TCLK

8 8 8 NSYT0 8NSYT1 8NTCLK

7CONFIG0 7CONFIG1 7 7 7

6NCONFIG0 6NCONFIG1 6T1E1 6TEI1 6TEI0

5GND 5GND 5GND 5GND 5GND

4 4 4 4 4

3PRPCM0 3NRPCM0 3 3 PRPCMI1 3NRPCM1

2 2 2 2 2

1PEPCM0 1NEPCM0 1 1 PEPCMI 1NEPCM1

Legend:

H4M, NH4M (V11, in) 4.096 MHz Clock received from the CMCF

SY, NSY (V11, in) Synchro frame of Private PCMs from the CMCF

HLOC, NHLOC (V11, in) Local clock (1.544 MHz or 2.048 MHz) from the CMCF

MICE, NMICE (V11, in) Private PCM transmission toward the CMCF

MICR, NMCIR (V11, in) External PCM reception from the CMCF

TCLK, NTCLK (V11, in) External PCM transmission clock from the CMCF

CONFIG, NCONFIG (V11, in) Configuration to the CMCF

T1E1 (TTL, out) T1 or E1 toward the CMCF

TEI (TTL, in) Position of the board in the shelf received from the CBP

PRPCM, NRPCM (in) External PCM reception

PEPCM, NEPCM (out) External PCM transmission

Table 2--30 Pin connections of the P11 connector

Board description Nortel Networks Confidential

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PE/DCL/DD/0142

no.

Row E

Purpose

no.

Row D

Purpose

no.

Row C

Purpose

no.

Row B

Purpose

no.

Row A

Purpose

6GND 6 6 +48 V 6 6 -- 4 8 V

5GND 5 5 +48 V 5 5 -- 4 8 V

4GND 4 4 +48 V 4 4 -- 4 8 V

3GND 3 3 +48 V 3 3 -- 4 8 V

2GND 2 2 +48 V 2 2 -- 4 8 V

1GND 1 1 +48 V 1 1 -- 4 8 V

Legend:

GND Common logical ground

Table 2--31 Pin connections of the P13 connector (Power)

no. Purpose Pin

no. Purpose

6 1 GND

7 2 RXDBG

8 3 TXDBG

9 4 PCBUG0

5GND

Legend:

RXDBG (RS232, in) Reception Debug

TXDBG (RS232, out) Transmission Debug

PCBUG0 (TTL, in) Console presence

Table 2--32 Pin connections of the P10 connector (Debug)

Board descriptionNortel Networks Confidential 2--65

S12000 BTS Reference Manual

no. Purpose Pin

no. Purpose

1TCK 2GND

3TDO 4

5TMS 6

7 8

9TDI 10 GND

Legend:

TCK (in) ISP Programming signal

TDO (out) ISP Programming signal

TMS (in) ISP Programming signal

TDI (in) ISP Programming signal

Table 2--33 Pin connections of the P9 connector (JTAG)

Electrical characteristics

The CPCMI board is powered by a nominal --48 V DC supply.

A10 W converter on the board supplies the +5 V at a maximum level of 1 A.

Board description Nortel Networks Confidential

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PE/DCL/DD/0142

2.7.4 CMCF board

The CBCF Module contains one or two CMCF boards. One CMCF board allows

operation in simplex mode, while two CMCF boards provide fully redundant

duplex operations.

2.7.4.1 Functional description

The CMCF Phase2 board performs the following functions:

synchronization of the BTS, through

•

selection of PCM clock

•

PCM link frequency measurement

•

input of external clock

•

generation of the reference frequency for the DRXs

•

generation of GSM Time

switching

signalling concentration

communication with the BSC and with O&M slaves (e.g. DRX, CPCMI,

RECAL)

2.7.4.2 Synchronization (SYN)

An oscillator provides the SYN function. The slave CMCF operates in a

phase--locked loop so that its H4M clock is in phase with the master CMCF. This

ensures that synchronization is maintained during a CMCF switchover.

GSM Time

The processing unit writes the GSM time (72 bits) every 60 ms and the value is

stored in the matrix at a rate of one bit per frame. Both the master and slave CMCF

re--read the information in the matrix of the master CMCF, which ensures that GSM

time is synchronized on both CMCF Phase2 boards.

Board descriptionNortel Networks Confidential 2--67

S12000 BTS Reference Manual

2.7.4.3 Physical description

The CMCF Phase2 board contains the following parts:

a master processing unit (33 MHz) that manages

•

8 Mbytes DRAM

•

4 Mbytes FLASH

•

one Ethernet link

•

one watchdog

•

32 64 Kbit/s HDLC links on one PCM

•

one RS232 test link

•

PCM switching matrix

•

one EPLD with configuration registers

•

I/O ports

a slave processing unit (33 MHz) that manages

•

one RS232 provisional link

•

32 64Kbit HDLC links on one PCM

•

one inter--CMCF 64 Kbit/s HDLC link

•

I/O ports

DC--DC converters with filters that provide 5 V, 12 V, and 3.3 V

a SYN function that synchronizes itself on one of the six signals received from

the CPCMI

a system that synchronizes the PCM clocks and switchover of both CMCF

Phase2 boards

a system that allows the synchronous transmission of GSM time on both CMCF

Phase2 boards

a system that measure the frequency of clock inputs

a 16 x 16 PCM switching matrix

a “silence” junctor to emit the A--bis silence code

a test system that allows the verification of PCM time slots

a 4--bit TEI register

an 8--bit register that encodes the position of 4 mini--switches (WD

Enable/Disable, Normal/Maintenance, etc.)

a chain switchover system

Board description Nortel Networks Confidential

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PE/DCL/DD/0142

Electrical characteristics

The CMCF Phase2 board receives a 48 V DC power supply and generates other

required voltages from this single source.

The CMCF Phase2 board owns one DC--DC converter only to create 5 V. Thanks

to regulators, 12 V, 3.3 V and 2.5 V derive from 5 V.

The 5 V power supply is required for most CMCF components, including both

processing units. It has an 12 W power consumption. Therefore, a converter running

at 80% will dissipate about 2.5 W.

The oscillator and DAC parts of the CMCF Phase2 board require a 12 V power

supply. The oscillator consumes 1 W during maintenance and up to 10 W in its

preheating phase.

The 3.3 V power supply is used strictly for the DRAM.

Synchronization

The CMCF provides synchronization for the radio part of the BTS.

The CMCF hardware allows the selection of a clock from the following sources:

six clock signals taken from external PCM links (from the CPCMI)

CMCF master clock

The long term stability of the external PCM link clock ensures the accuracy and

stability required.

A frequency meter function on the CMCF Phase2 board measures the clocks to

determine their validity.

GSM Time channel

The SYN function generates and distributes the GSM--time channel on the Private

PCM. The GSM--time is the local BTS time, so the counters are arbitrarily set to zero

after turning on the CMCF.

The GSM time channel emission is dedicated to a special hardware system.

Synchronization between master and slave processing units

The master processing unit fully synchronizes the slave processing unit.

Fully synchronous GSM--time emission is performed through a pulse signal sent

from the Master GSM--time generation hardware system to the slave system.

External synchronization connection

An external synchronization interface is provided directly on the SYN part of the

CMCF. The software selects the synchronization origin.

Board descriptionNortel Networks Confidential 2--69

S12000 BTS Reference Manual

Front panel

The front panel of the CMCF contains the following:

a Reset button

16 LEDs

two connectors

The Reset button allows a hard reset of the board.

The front panel of the CMCF Phase2 board is shown in Figure 2--21.

LEDs

Table 2--34 describes the LEDs on the front panel of the CMCF Phase2 board.

Type LED (color) Meaning (when lit)

Board state indicators BIST (yellow) The built--in self--test is running or is stopped with

a default result.

ON (green) The board is operating and is providing a PCM

clock.

ABIS (green) The A--bis link is setup.

+5 V (green) The power is on.

RDY (green) The board is ready to become operational.

RUN (green) The applicative software is mounted.

State indicators of the external

(

)

OVEN (yellow) The OVCXO is in its preheating phase.

PCM link (

-- b i s ) LOCKED (vert) The SYN function is synchronized.

HLDVR (red) The SYN function is operating on a local clock.

CLK0 (green) Indicates the clock source.

CLK1 (green) Indicates the clock source.

CLK2 (green) Indicates the clock source.

LNK (green) The Ethernet link is established.

TX (yellow) There is a transmission on the Ethernet link.

State indicators of the external

(

)

COL (red) There is a collision on the Ethernet link.

PCM link (

-- b i s ) RX (yellow) There is a reception on the Ethernet link.

Table 2--34 LEDs on the front panel of the CMCF Phase2 Board

Board description Nortel Networks Confidential

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PE/DCL/DD/0142

Screw

BDM

JTAG

Figure 2--21 CMCF Phase2 board

Board descriptionNortel Networks Confidential 2--71

S12000 BTS Reference Manual

2.7.4.4 Connectors

The CMCF uses eight connectors accessed from the following locations:

on the front panel (two)

inside the board (six)

The connectors are identified in Table 2--35.

Access Connector Type Purpose

Front panel TEST Sub--D 15--pin male, high density Connector used for debugging, RACE

access, BDM, test clocks, and

OCVCXO.

ETH RJ45 Connector used to connect the

Ethernet link.

Inside the

J3 BDM HE10 10--pin male

board J4 JTAG HE10 10--pin male Connector used to program the

EPLD.

P1 60--pin male Connector that plugs into the CBP.

P2 60--pin male Connector that plugs into the CBP.

P3 60--pin male Connector that plugs into the CBP.

P4 (power) 10--pin Power supply connector, which

connects to the CBP.

Table 2--35 CMCF Phase2 board connectors

Board description Nortel Networks Confidential

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Pin connections

The pin connections and their significance for the CMCF connectors are identified

in Table 2--36 to Table 2--43.

no. Purpose Pin

no. Purpose

1NRESETH 6NDS 11 NBERR

2FREEZE 7BKPT 12 IFETCH

3GND 8IPIPE0 13 CLKREFIN

4TX 9RX 14 TCLK

5VCO 10 PRESCONS 15 H4M

Legend:

NRESETH Used for the BDM

FREEZE Used for BDM

GND Ground

TX Debug and RACE

VCO OCVCXO Voltage control

NDS Used for BDM

BKPT Used for BDM

IPIPE0 Used for debug and RACE

RX Debug (Console presence)

RX Used for BDM

PRESCONS Used for BDM

CLKREFIN Selected reference clock

TCLK PCM transmission clock

H4M Private PCM clock

Table 2--36 Pin connections of the TEST connector

Pin no. Purpose Used for

1T+ Output pair +

2T-- Output pair --

3R+ Input pair +

4R-- Input pair --

Table 2--37 Pin connections of the ETH connector

Board descriptionNortel Networks Confidential 2--73

S12000 BTS Reference Manual

no. Purpose Pin

no. Purpose

1/DS 6FREEZE

2/BERR 7/RESETH

3GND 8DSI

4/BKP 9NC

5GND 10 DSO

Legend:

/DS Data strobe I/O Input

/BERR Bus error output signal

GND Electrical ground

/BKP Clock output signal

GND Electrical ground

FREEZE Break point acknowledge output signal

/RESETH Reset IO signal

DSI Serial data input signal

NC Not connected

DSO Serial data output signal

Table 2--38 Pin connections of the J3 (BDM) connector

no. Purpose Pin

no. Purpose

1TCK 6

2GND 7Reset

3TDO 8

4VCC 9Data in

5TMS 10 Ground

Legend:

TCK Clock

GND Ground

TDO Data out

VCC Power supply

TMS Selection

TRST Reset

TDI Data in

Table 2--39 Pin connections of the J4 (JTAG) Connector

Board description Nortel Networks Confidential

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PE/DCL/DD/0142

no.

Row A

Purpose

no.

Row B

Purpose

no.

Row C

Purpose

no.

Row D

Purpose

no.

Row E

Purpose

12 GND 12 GND 12 GND 12 GND 12 GND

11 RS232TX 11 11 P5 V 11 11 RS232RX

10 RS232SP1 10 RS232SP2 10 E1T1 10 RS232SP3 10 RE232SP4

9 9 9 GND 9 9

8GPSCLK 8NGPSCLK 8GND 8 8

7PSYT00 7NSYT00 7TCLK 7CONFIG00 7NCONFIG00

6PSYT10 6NSYT10 6NTCLK 6CONFIG10 6NCONFIG10

5PSYT01 5NSYT01 5SY 5CONFIG01 5NCONFIG01

4PSYT11 4NSYT11 4NSY 4CONFIG11 4NCONFIG11

3PSYT02 3NSYT02 3H4M 3CONFIG02 3NCONFIG02

2PSYT12 2NSYT12 2NH4M 2CONFIG12 2NCONFIG12

1PLUG2 1GND 1GND 1GND 1PLUG3

Table 2--40 Pin connections of the P1 connector

no.

Row A

Purpose

no.

Row B

Purpose

no.

Row C

Purpose

no.

Row D

Purpose

no.

Row E

Purpose

12 MICE0 12 NMICE0 12 SY0 12 MICR0 12 NMICR0

11 MICE1 11 NMICE1 11 NSY0 11 MICR1 11 NMICR1

10 MICE2 10 NMICE2 10 H4M0 10 MICR2 10 NMICR2

9MICE3 9NMICE3 9NH4M0 9MICR3 9NMICR3

8MICE4 8NMICE4 8SY1 8MICR4 8NMICR4

7MICE5 7NMICE5 7NSY1 7MICR5 7NMICR5

6MICE6 6NMICE6 6H4M1 6MICR6 6NMICR6

5MICE7 5NMICE7 5NH4M1 5MICR7 5NMICR7

4MICE8 4NMICE8 4SY2 4MICR8 4NMICR8

3MICE9 3NMICE9 3NSY2 3MICR9 3NMICR9

2MICE10 2NMICE10 2H4M2 2MICR10 2NMICR10

1MICE11 1NMICE11 1NH4M2 1MICR11 1NMICR11

Table 2--41 Pin connections of the P2 connector

Board descriptionNortel Networks Confidential 2--75

S12000 BTS Reference Manual

no.

Row A

Purpose

no.

Row B

Purpose

no.

Row C

Purpose

no.

Row D

Purpose

no.

Row E

Purpose

12 PLUG0 12 GND 12 GND 12 GND 12 PLUG1

11 SCOUT 11 11 SCIN 11 11 CMCFOUT

10 NSCOUT 10 10 NSCIN 10 10 NCMCFOU

9GND 9GND 9CMCFIN 9GND 9GND

8RXD 8NRXD 8NCMCFIN 8RXCLK 8NRXCLK

7TXD 7NTXD 7 7 TXCLK 7NTXCLK

6 6 6 6 6

5 5 5 5 5

4GSMIN 4NGSMIN 4 4 GSMOUT 4NGSMOUT

3GSMSYIN 3NGSMSYIN 3GND 3GSMSYOU

3 NGSMSYO

2TWI0 2TEI1 2AOUB 2TEI2 2TEI3

1GND 1GND 1GND 1GND 1GND

Table 2--42 Pin connections of the P3 connector

no.

Row A

Purpose

no.

Row B

Purpose

no.

Row C

Purpose

no.

Row D

Purpose

no.

Row E

Purpose

1GND 1 1 0V 1 1 -- 4 8 V

2GND 2 2 0V 2 2 -- 4 8 V

Legend:

GND Common logical ground

Table 2--43 Pin connections of the P4 (Power) connector

2.7.4.5 Electrical characteristics

The CMCF is powered by a nominal dc --48 V power supply. The acceptable range

is from 36 V to 72 V.

The maximum power consumption of the board is 0.7 A.

Board description Nortel Networks Confidential

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2.7.5 BCFICO board

2.7.5.1 Functional description

The BCFICO board allows the reception and transmission of external signals

towards the CMCF and CPCMI boards.

The coding of TEI signals can be set using the switched pull--down resistor inside

the BCFICO board.

2.7.5.2 Physical description

The BCFICO contains the following:

six connectors on the front panel

four connectors inside the board

one switch register inside the board

The BCFICO board is shown in Figure 2--22.

The connectors are identified in Table 2--44 and the register is described in the

Section “Switch register”.

Access Connector Type Purpose

Front panel PCM0/1 Sub--D, 25--pin female Connectors used for Private PCM links 0 and

1. Connected to J8 on the inside of the

board.

PCM2/3 Sub--D, 25--pin female Connectors used for Private PCM links 2 and

3. Connected to J8 on the inside of the

board

PCM4/5 Sub--D, 25--pin female Connectors used for Private PCM links 4 and

5. Connected to J5 on the inside of the

board

ABIS Sub--D 25--pin male Connected to J5 on the inside of the board.

PWR Sub--D, 3--pin male +48 V dc power supply connector.

Connected to the J3 connector on the inside

of the board.

RS232 Sub--D, 9--pin male Connected to the J1 connector on the inside

of the board.

Inside the

board

J2 10--pin female Power supply connector, which is plugged

into the CBP.

J4 60--pin female Connecter that is plugged into the CBP.

J6 60--pin female Connecter that is plugged into the CBP.

J7 60--pin female Connecter that is plugged into the CBP.

Table 2--44 BCFICO board connectors

Board descriptionNortel Networks Confidential 2--77

S12000 BTS Reference Manual

TEI0

TEI1

TEI2

TEI3

Figure 2--22 BCFICO board

Board description Nortel Networks Confidential

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2.7.5.3 Pin connections

The pin connections of the BCFICO connectors are identified in Table 2--45 to

Table 2--54.

no. Purpose Pin

no. Purpose

1SEL4 14 NSEL4

2SEL5 15 NSEL5

3SEL6 16 NSEL6

4SEL7 17 NSEL7

5GND 18 GND

6GND 19 GND

7MICE0 20 NMICE0

8MICE1 21 NMICE1

9MICR0 22 NMICR0

10 MICR1 23 NMICR1

11 PH40 24 NH40

12 PSY0 25 NSY0

13 GND

Table 2--45 PCM0/1 pin connections

Board descriptionNortel Networks Confidential 2--79

S12000 BTS Reference Manual

no. Purpose Pin

no. Purpose

1SEL14 14 NSEL14

2SEL15 15 NSEL15

3SEL16 16 NSEL16

4SEL17 17 NSEL17

5GND 18 GND

6GND 19 GND

7MICE2 20 NMICE2

8MICE3 21 NMICE3

9MICR2 22 NMICR2

10 MICR3 23 NMICR3

11 PH41 24 NH41

12 PSY1 25 NSY1

13 GND

Table 2--46 PCM2/3 pin connections

no. Purpose Pin

no. Purpose

1SEL24 14 NSEL24

2SEL25 15 NSEL25

3SEL26 16 NSEL26

4SEL27 17 NSEL27

5GND 18 GND

6GND 19 GND

7MICE4 20 NMICE4

8MICE5 21 NMICE5

9MICR4 22 NMICR4

10 MICR5 23 NMICR5

11 PH42 24 NH42

12 PSY2 25 NSY2

13 GND

Table 2--47 PCM4/5 pin connections

Board description Nortel Networks Confidential

2--80

PE/DCL/DD/0142

no. Purpose Pin

no. Purpose

1EHDB0 14 EHDB3

2NEHDB0 15 NEHDB3

3RHDB0 16 RHDB3

4NRHDB0 17 NRHDB3

5EHDB1 18 EHDB4

6NEHDB1 19 NEHDB4

7RHDB1 20 RHDB4

8NRHDB1 21 NRHDB4

9EHDB2 22 EHDB5

10 NEHDB2 23 NEHDB5

11 RHDB2 24 RHDB5

12 NRHDB2 25 NRHDB5

Table 2--48 ABIS pin connections

no. Purpose

1(--)48 V

2GND

3(+)48 V

Table 2--49 PWR pin connections

Board descriptionNortel Networks Confidential 2--81

S12000 BTS Reference Manual

no. Purpose

1RS232SP2

2RS232RX

3RS232TX

4RS232SP1

5GND

6RS232SP3

7RS232SP4

8GPSCLK

9NGPSCLK

Table 2--50 RS232 pin connections

A B C D E

1(--)48 V (+)48 V GND

2(--)48 V (+)48 V GND

3(--)48 V (+)48 V GND

4(--)48 V (+)48 V GND

5(--)48 V (+)48 V GND

6(--)48 V (+)48 V GND

Table 2--51 J2 pin connections

Board description Nortel Networks Confidential

2--82

PE/DCL/DD/0142

A B C D E

11 NRHDB1 RHDB1 NRHDB0 RHDB0

9NEHDB1 EHDB1 NEHDB0 EHDB0

7NRHDB3 RHDB3 NRHDB2 RHDB2

5NEHDB3 EHDB3 NEHDB2 EHDB2

3NRHDB5 RHDB5 NRHDB4 RHDB4

1NEHDB5 EHDB5 NEHDB4 EHDB4

Table 2--52 J4 pin connections

A B C D E

12 GND GND +5 V GND GND

11 RS232RX RS232SP3 GND RS232SP2 RS232TX

10 RS232SP4 NGPSCLK GND GPSCLK RS232SP1

9TEI3 TEI2 TEI1 TEI0 TEI20

8TEI00 TEI01 NAOUB TEI11

7GND GND GND NHLOC HLOC

6NCONFIG00 CONFIG00 TCLK NSYT00 PSYT00

5NCONFIG10 CONFIG10 NTCLK NSYT10 PSYT10

4NCONFIG01 CONFIG01 PSY NSYT01 PSYT01

3NCONFIG11 CONFIG11 NSY NSYT11 PSYT11

2NCONFIG02 CONFIG02 PH4 NSYT02 PSYT02

1NCONFIG12 CONFIG12 NH4 NSYT12 PSYT12

Table 2--53 J6 pin connections

Board descriptionNortel Networks Confidential 2--83

S12000 BTS Reference Manual

A B C D E

12 NMICR0 MICR0 PSY0 NMICE0 MICE0

11 NMICR1 MICR1 NSY0 NMICE1 MICE1

10 NMICR2 MICR2 PH40 NMICE2 MICE2

9NMICR3 MICR3 NH40 NMICE3 MICE3

8NMICR4 MICR4 PSY1 NMICE4 MICE4

7NMICR5 MICR5 NSY1 NMICE5 MICE5

6PH41 NMICE6 MICE6

5NH41 NMICE7 MICE7

4PSY2 NMICE8 MICE8

3NSY2 NMICE9 MICE9

2PH42 NMICE10 MICE10

1NH42 NMICE11 MICE11

Table 2--54 J7 pin connections

Board description Nortel Networks Confidential

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2.7.5.4 Switch resistor

The TEI signals can be configured by setting the switch pull--down register inside

inside the BCFICO in the positions indicated in Table 2--55.

Signal

name Link Connector pin termination Logical

code

TEI00

TEI01

to CPCMI0

grounded on CBP

TEI10

TEI11

to CPCMI1

left unconnected

grounded on CBP

TEI20

TEI21

to CPCMI2

grounded on CBP

left unconnected

TEI0

TEI1

TEI2

TEI3

to2CMCF

pull--down serial mounted with a switch on

BCFICO

pull--down serial mounted with a switch on

BCFICO

pull--down serial mounted with a switch on

BCFICO

pull--down serial mounted with a switch on

BCFICO

0or1

AOUB

NAOUB

to CMCF_A

to CMCF_B

left unconnected.

grounded on CBP

Table 2--55 TEI Resistor coding on the switch register

Board descriptionNortel Networks Confidential 2--85

S12000 BTS Reference Manual

2.7.5.5 TEI configuration

WIth the TEI0 to TEI3 (S1) switches of the CBCICO board (voir Figure 2--22) you

can update the TEI configuration as described in the following table :

TEI number TEI0

switch

TEI1

switch

TEI2

switch

TEI3

switch

01 1 1 1

11 1 1 0

21 1 0 1

31 1 0 0

41 0 1 1

51 0 1 0

61 0 0 1

71 0 0 0

80 1 1 1

90 1 1 0

10 0 1 0 1

11 0 1 0 0

12 0 0 1 1

13 0 0 1 0

14 0 0 0 1

15 0 0 0 0

Key:

0 : Indicates that the switch is in the “ON“ position

1 : Indicates that the switch is in the “OFF“ position

Note: The gray line indicates the factory setting.

Table 2--56 TEI configuration

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2.7.5.6 Interfaces specifications

The 48 V power supply is connected to the MAINICO board via power terminals.

screw:

M1 Mechanical ground connected to the DRXs PUPS output ground.

M2 --48 V supply

M3 0 V supply

each 48 V DRX Power connector is protected by a 2A fuse.

2.7.6 CBCF Back Panel (CBP)

2.7.6.1 Functional description

The CBCF Back Panel (CBP) provides the interconnection between the following

CBCF Module boards:

two CMCFs

three CPCMIs

one BCFICO

2.7.6.2 Physical description

The CBP contains the following six connectors:

two CMCF signal connectors

•

CMCF_A

•

CMCF_B

three CPCMI signal connectors

•

CPCMI_0

•

CPCMI_1

•

CPCMI_2

one BCFICO connector

The CBP board and its connectors are shown in Figure 2--23.

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SIGN1C

SIGN2C

SIGN1B

SIGN2B

SIGN1A

SIGN2A

AL1

AL2

AL3

AL4

AL5

AL6

SIGN6ASIGN6BSIGN6C

ABCDE

CMCF_B

connectors

BCFICO

connectors

CPCMI_2

connectors

CMCF_A

connectors

CPCMI_0

connectors

CPCMI_1

connectors

ACE ACE

ABCDE ABCDE ABCDE

ACEACE ACE ACE

ABCDE ABCDE ABCDE

SIGN3 SIGN4 SIGN5

Figure 2--23 CBP board

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2.7.6.3 Pin connections

The pin connections of the CBP connectors are identified in Table 2--57 to

Table 2--69.

A B C D E

12 PLUGA0 GND GND GND PLUGA0

11 CMCFAB SCBA SCAB

10 NCMCFAB NSCBA NSCAB

9GND GND CMCFBA GND GND

8NCLKBA CLKBA NCMCFBA NDATBA DATBA

7NCLKAB CLKAB NDATAB DATAB

4NGSMAB GSMAB NGSMBA GSMBA

3NGSMSYAB GSMSYAB GND NGSMSYBA GSMSYBA

2TEI3 TEI2 AOUB TEI1 TEI0

1GND GND GND GND GND

Table 2--57 CMCF_A (Sign1A) pin connections

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A B C D E

12 NMICR0 MICR0 PSY0 NMICE0 MICE0

11 NMICR1 MICR1 NSY0 NMICE1 MICE1

10 NMICR2 MICR2 PH40 NMICE2 MICE2

9NMICR3 MICR3 NH40 NMICE3 MICE3

8NMICR4 MICR4 PSY1 NMICE4 MICE4

7NMICR5 MICR5 NSY1 NMICE5 MICE5

6NMICR6 MICR6 PH41 NMICE6 MICE6

5NMICR7 MICR7 NH41 NMICE7 MICE7

4NMICR8 MICR8 PSY2 NMICE8 MICE8

3NMICR9 MICR9 NSY2 NMICE9 MICE9

2NMICR10 MICR10 PH42 NMICE10 MICE10

1NMICR11 MICR11 NH42 NMICE11 MICE11

Table 2--58 CMCF_A (Sign1B) pin connections

A B C D E

12 GND GND GND GND GND

11 RS232RX +5 V RS232TX

10 RS232SP4 RS232SP3 E1T1 RS232SP2 RS232SP1

9HLOC

8NHLOC NGPSCLK GPSCLK

7NCONFIG00 CONFIG00 TCLK NSYT00 PSYT00

6NCONFIG10 CONFIG10 NTCLK NSYT10 PSYT10

5NCONFIG01 CONFIG01 PSY NSYT01 PSYT01

4NCONFIG11 CONFIG11 NSY NSYT11 PSYT11

3NCONFIG02 CONFIG02 PH4 NSYT02 PSYT02

2NCONFIG12 CONFIG12 NH4 NSYT12 PSYT12

1PLUGA1 GND GND GND PLUGA1

Table 2--59 CMCF_A (Sign1C) pin connections

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A B C D E

12 PLUGB0 GND GND GND PLUGB0

11 CMCFBA SCAB SCBA

10 NCMCFBA NSCAB NSCBA

9GND GND CMCFAB GND GND

8NCLKAB CLKAB NCMCFAB NDATAB DATAB

7NCLKBA CLKBA NDATBA DATBA

4NGSMBA GSMBA NGSMAB GSMAB

3NGSMSYBA GSMSYBA GND NGSMSYAB GSMSYAB

2TEI3 TEI2 NAOUB TEI1 TEI0

1GND GND GND GND GND

Table 2--60 CMCF_B (Sign2A) pin connections

A B C D E

12 NMICR0 MICR0 PSY0 NMICE0 MICE0

11 NMICR1 MICR1 NSY0 NMICE1 MICE1

10 NMICR2 MICR2 PH40 NMICE2 MICE2

9NMICR3 MICR3 NH40 NMICE3 MICE3

8NMICR4 MICR4 PSY1 NMICE4 MICE4

7NMICR5 MICR5 NSY1 NMICE5 MICE5

6NMICR6 MICR6 PH41 NMICE6 MICE6

5NMICR7 MICR7 NH41 NMICE7 MICE7

4NMICR8 MICR8 PSY2 NMICE8 MICE8

3NMICR9 MICR9 NSY2 NMICE9 MICE9

2NMICR10 MICR10 PH42 NMICE10 MICE10

1NMICR11 MICR11 NH42 NMICE11 MICE11

Table 2--61 CMCF_B (Sign2B) pin connections

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A B C D E

12 GND GND GND GND GND

11 RS232RX +5 V RS232TX

10 RS232SP4 RS232SP3 E1T1 RS232SP2 RS232SP1

9HLOC

8NHLOC NGPSCLK GPSCLK

7NCONFIG00 CONFIG00 TCLK NSYT00 PSYT00

6NCONFIG10 CONFIG10 NTCLK NSYT10 PSYT10

5NCONFIG01 CONFIG01 PSY NSYT01 PSYT01

4NCONFIG11 CONFIG11 NSY NSYT11 PSYT11

3NCONFIG02 CONFIG02 PH4 NSYT02 PSYT02

2NCONFIG12 CONFIG12 NH4 NSYT12 PSYT12

1PLUGB1 GND GND GND PLUGB1

Table 2--62 CMCF_B (Sign2C) pin connections

A B C D E

1NEHDB1 EHDB1 NEHDB0 EHDB0

3NRHDB1 RHDB1 NRHDB0 RHDB0

5GND GND GND GND GND

6TEI01 TEI00 E1T1 NCONFIG10 NCONFIG00

7CONFIG10 CONFIG00

8NTCLK NSYT10 NSYT00

9TCLK PSYT10 PSYT00 NHLOC NSY

10 HLOC PSY

11 NMICR7 NMICE7 NMICR6 NMICE6 NH4

12 MICR7 MICE7 MICR6 MICE6 PH4

Table 2--63 CPCMI_0 (Sign3) pin connections

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A B C D E

1NEHDB3 EHDB3 NEHDB2 EHDB2

3NRHDB3 RHDB3 NRHDB2 RHDB2

5GND GND GND GND GND

6TEI11 TEI10 E1T1 NCONFIG11 NCONFIG01

7CONFIG11 CONFIG01

8NTCLK NSYT11 NSYT01

9TCLK PSYT11 PSYT01 NHLOC NSY

10 HLOC PSY

11 NMICR9 NMICE9 NMICR8 NMICE8 NH4

12 MICR9 MICE9 MICR8 MICE8 PH4

Table 2--64 CPCMI_1 (Sign 4) pin connections

A B C D E

1NEHDB5 EHDB5 NEHDB4 EHDB4

3NRHDB5 RHDB5 NRHDB4 RHDB4

5GND GND GND GND GND

6TEI21 TEI20 E1T1 NCONFIG12 NCONFIG02

7CONFIG12 CONFIG02

8NTCLK NSYT12 NSYT02

9TCLK PSYT12 PSYT02 NHLOC NSY

10 HLOC PSY

11 NMICR11 NMICE11 NMICR10 NMICE10 NH4

12 MICR11 MICE11 MICR10 MICE10 PH4

Table 2--65 CPCMI_2 (Sign 5) pin connections

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A B C D E

12 NMICR0 MICR0 PSY0 NMICE0 MICE0

11 NMICR1 MICR1 NSY0 NMICE1 MICE1

10 NMICR2 MICR2 PH40 NMICE2 MICE2

9NMICR3 MICR3 NH40 NMICE3 MICE3

8NMICR4 MICR4 PSY1 NMICE4 MICE4

7NMICR5 MICR5 NSY1 NMICE5 MICE5

6PH41 NMICE6 MICE6

5NH41 NMICE7 MICE7

4PSY2 NMICE8 MICE8

3NSY2 NMICE9 MICE9

2PH42 NMICE10 MICE10

1NH42 NMICE11 MICE11

Table 2--66 BCFICO (Sign6A) pin connections

A B C D E

12 GND GND +5 V GND GND

11 RS232RX RS232SP3 GND RS232SP2 RS232TX

10 RS232SP4 NGPSCLK GND GPSCLK RS232SP1

9TEI3 TEI2 TEI1 TEI0 TEI20

8TEI00 TEI01 NAOUB TEI11

7GND GND GND NHLOC HLOC

6NCONFIG00 CONFIG00 TCLK NSYT00 PSYT00

5NCONFIG10 CONFIG10 NTCLK NSYT10 PSYT10

4NCONFIG01 CONFIG01 PSY NSYT01 PSYT01

3NCONFIG11 CONFIG11 NSY NSYT11 PSYT11

2NCONFIG02 CONFIG02 PH4 NSYT02 PSYT02

1NCONFIG12 CONFIG12 NH4 NSYT12 PSYT12

Table 2--67 BCFICO (Sign6B) pin connections

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A B C D E

11 NRHDB1 RHDB1 NRHDB0 RHDB0

9NEHDB1 EHDB1 NEHDB0 EHDB0

7NRHDB3 RHDB3 NRHDB2 RHDB2

5NEHDB3 EHDB3 NEHDB2 EHDB2

3NRHDB5 RHDB5 NRHDB4 RHDB4

1NEHDB5 EHDB5 NEHDB4 EHDB4

Table 2--68 BCFICO (Sign6C) pin connections

A B C D E

1-- 4 8 V +48 V GND

2-- 4 8 V +48 V GND

3-- 4 8 V +48 V GND

4-- 4 8 V +48 V GND

5-- 4 8 V +48 V GND

6-- 4 8 V +48 V GND

Table 2--69 AL1, AL2, AL3, AL4, AL5, AL6 pin connections

(Power voltage connectors)

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2.8 DRX, e--DRX, or DRX--ND3 module

The module processes reception and transmission signals. It has a receive sensitivity

of --110 dBm or --108 dBm.

2.8.1 DRX front panel

The DRX front panel has the following elements (see Figure 2--24):

a 26--pin power supply connector (PWR)

a 66--pin connector for the private PCM (FH--PCM)

a 50--pin test connector (TEST)

a transmission signal output (TX OUT)

a diversity reception signal input (RXD IN)

a main reception signal input (RXM IN)

12 LEDs:

•

+5 V: Power supply

•

RES1: (Reserved)

•

ALA: Alarm

•

DRX: DRX general status

•

AMNU: AMNU status

•

SPU: SPU or RX status

•

BDT: BDT status

•

TX: TX status

•

LI: Ethernet connection OK

•

CL: Ethernet collision

•

TX: Ethernet transmission

•

RX: Ethernet reception

The LEDs for the AMNU, SPU, BDT, and TX can be in flashing mode while the

corresponding software is being downloaded.

For further information about the status of LEDs, refer to the document “S12000

BTS Maintenance Manual -- Procedures”.

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ALA

DRX

SPU

+5V

RES1

AMNU

BDT

RESET

TEST

FH--PCM

PWR

TX OUT

RXD IN

RXM IN

Legend : Red LED

Green LED

Yellow LED

Screws

Figure 2--24 DRX module

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2.8.2 e--DRX front panel

The e--DRX front panel has the following elements (see Figure 2--25):

a 26--pin power supply connector (PWR)

a 66--pin connector for the private PCM (FH--PCM)

a 50--pin test connector (TEST)

a transmission signal output (TX)

a diversity reception signal input (RXD IN)

a main reception signal input (RXM IN)

8 LEDs:

•

FWR: TBD

•

SPU: SPU status

•

e--DRX: e--DRX general status

•

ALA: Alarm

•

BIST: Built--In Self Status

•

LI: Ethernet connection OK

•

TX: Ethernet transmission

•

RX: Ethernet reception

1 button:

•

RESET: restart the module

For further information about the status of LEDs, refer to NTP < 144 >.

For more details about DRX and e--DRX architectures, please see chapters 3.3

and 3.4.

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SPU

DRX

ALA

BIST

RESET

TEST

FH--PCM

PWR

TX OUT

RXD IN

RXM IN

Legend : Red LED

Green LED

Yellow LED

Screws

FWR

Figure 2--25 e--DRX module

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2.9 RX--splitter

The RX--splitter amplifies a reception signal and splits it into several signals that

it sends to the receivers.

2.9.1 Principle

The RX--splitter exists in two types: 1x4 and 2x2. It consists of the following

elements according to the type :

Type 1x4: a two--stage, four--channel splitter (see Figure 2--26), which splits the

signal from the LNA--splitter into four identical signals.

Type 2x2: a two--stage, two two--channels splitter (see Figure 2--27), which

splits each of two signals from the LNA--splitter into two identical signals.

Four Low--Noise Amplifiers (LNA), which amplify one channel each.

Four resistive attenuators, which adjust the gain to the required value on each

LNA channel.

A remote amplifier, which controls the power of the incoming signal. The DRX

supervises the amplifier and sends the information to the BSC.

Each channel of the RX--splitter is connected to a different receiver. The receiver

supplies the LNA of the channel to which it is connected by means of the RF cable.

The four channels are therefore supplied independently of one another.

Channels which are not connected to any receiver are not supplied with power, and

so need not be adapted by a 50 Ωtermination.

Nominal gain on the four outputs is + 9.2 dBm (GSM 850), + 8 dBm (GSM 1900).

2.9.2 Consumption

The RX--splitter is supplied with +12 V dc + 5% or +5.5 V dc + 5% (GSM 1900).

Its maximum consumption is 40 mA (GSM 1900) 50 mA for GSM 850. The

receivers to which it is connected trip an alarm if this limit is exceeded.

2.9.3 RX--splitter front panel

The front panel of the RX--splitter has the following elements (see Figure 2--28):

Four RX connectors each supply a signal to a receiver which supplies them with

voltage.

An IN connector is used by the RX--splitter to receive the reception signal.

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RX--splitter

RX0

LNA

RF combiner

RX1

RX2

RX3

LNA

Power supply

regulation

Power supply

regulation

Power supply

regulation

Power supply

regulation

Figure 2--26 RX--splitter diagram type 1x4

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Power supply

regulation

Power supply

regulation

Power supply

regulation

Power supply

regulation

RX--splitter 2X2

RX0--0

LNA

RF combiner

LNA

RX0--1

RX1--0

RX1--1

RF combiner

Figure 2--27 RX--splitter diagram type 2x2

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RX0 RX1 IN RX2 RX3

Figure 2--28 RX--splitter type 1x4

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RX0--0 RX0--1 IN0 RX1--1IN1 RX1--1

Figure 2--29 Rx--splitter type 2x2

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2.10 Power system

2.10.1 Power system description

This system is made up of:

a Power Controller Unit (PCU) and a set of up to seven Rectifier Units (SRU),

each with 600 W output capability (one is for redundancy)

or a GSM Integrated power System (GIPS)

a set of batteries (Internal or external)

This system and the batteries constitute the dc energy distribution system used to

supply the various modules of the cabinet. The Power System delivers a 54.6 V dc

voltage which it generates from the Mains voltage for a 25°C temperature (77°F)

of the probe under the batteries.

2.10.2 PCU description

The PCU has the four following separate outputs which supply the modules of the

cabinet:

output 1 (--) to the power amplifiers and F--type converters

output 2 (--) to the climatic system fans

output 3 (--) to the DRX units

output 4 (--) to the CBCF, the user optional accessory, and the RECAL board

The PCU also provides a common 0 V output.

PCU protections

The PCU outputs are protected by these breakers:

output current 1: breaker L1 (80 A)

output current 2: breaker L2 (10 A, time delay)

output current 3: breaker L3 (15 A)

output current 4: breaker L4 (15 A)

When circuit--breakers L1 or L3 are tripped, an alarm signal is generated.

A manual power supply cut--off is provided on all four outputs by circuit--breakers

on the front panel of the PCU.

Alarms

Several alarms are provided in the PCU, in order to detect the following situations:

ac fault: when the ac supply is interrupted or is outside the voltage range (single

alarm for all rectifiers)

dc fault: when the dc supply is interrupted or is outside the 40 V to 58 V (±0.5 V)

range (single alarm for all rectifiers) or if a temperature sensor is not properly

linked to the PCU or if a local bias fails.

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excessive temperature: The rectifier is switched off when the maximum

operating temperature is exceeded, and then starts again when the temperature

has dropped back to normal (single alarm for all rectifiers).

batteries on discharge (except for S8006 BTS)

PCU protection device

Load1 threshold

Alarm connector

This is a male 15--point SubD connector:

1ac fault alarm

2dc fault alarm

3NC

4Alarm common

5Load1 threshold alarm

6NC

7Over temperature alarm

8PCU protection alarm

9Battery on discharge

10 NC

11 NC

12 NC

13 NC

14 NC

15 NC

Note: Only alarms sent back to the RECAL

board are mentionned.

Table 2--70 Alarm connector

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Monitoring connector

This is a female 15--point SubD connector:

1Alarm common

2Alarm common

3NC

4NC

5NC

6NC

7NC

8CEATS 1a

9CEATS 1b

10 NC

11 NC

12 Mechanical ground

13 Mechanical ground

14 NC

15 NC

Note: NC = not connected

Table 2--71 Monitoring connector

2.10.2.1 PCU Front panel

The front panel includes the following (see Figure 2--30):

four manual circuit breakers (PA, FAN, DRX and BCF)

test points:

•

two points for type1 (PROBE1 and PROBE2)

•

one point for type2 (PROBE1 only)

a terminal for connection with the battery cables

six lights emitting LEDs

•

The green LED (ON) indicates that the PCU is operating normally.

•

The red LED (AL) indicates that there is a fault in the temperature sensor

circuit of the batteries or in the PCU.

•

Four other green LEDs indicates that the four outputs of the PCU are

operational.

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2.10.2.2 PCU Top panel

The top panel includes alarm and monitoring connectors. The alarm connector (J4)

is a male type, while the control connector (J5) is a female type.

LEDs

The LEDs give information on the status of the PCU rectifier:

The green LED (ON) indicates that the PCU is operating normally.

The red LED (AL) indicates that there is a fault in the temperature sensor circuit

of the batteries or in the PCU local bias system.

Four other green LEDs indicates that the four outputs of the PCU are operational.

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Figure 2--30 Power supply rack (seven--rectifier type)

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2.10.3 SRU description

Input voltage

Nominal 230 V ac

Range: 176 V ac to 264 V ac

Output characteristics

Nominal output voltage is 54.6 V ±0.2 V.

The output voltage range is 40 V to 58 V ±0.5 V.

Protection against power surges is 59.5 V (+0 V, --1 V).

Nominal current is 11A minimum for Vout = 54.6 V. The output power is constant

(600W) for output voltages between 40 V and 58 V.

Alarms

Several alarm signals can be generated, in the following cases:

overtemperature

missing module

ac input voltage interrupted or not within 176 V--264 V thresholds

dc output voltage not within 40 V--58 V thresholds (±0.5 V)

An ac alarm leads to a dc alarm, but a dc alarm does not necessarily lead to an ac

alarm.

Floating voltage control

The floating voltage leaving the rectifiers is automatically adjusted in inverse ratio

to battery temperature. This floating voltage is necessary for an optimum battery

service life.

2.10.3.1 SRU Front panel

The front panel includes the following (see Figure 2--30):

a manual circuit switch

two voltage test points

two LEDs

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The LEDs give information on the status of the rectifier:

The green LED (ON) is on to indicate that the rectifier is in normal operating

mode, that is, the ac supply is within the appropriate voltage range and a dc

voltage is supplied at the rectifier output.

The red LED (AL) is on to indicate that the ac supply is within the appropriate

voltage range but rectifier temperature is too high.

2.10.4 GIPS description

This system is made up of a Distribution and Control Unit (DCU), a Set of Rectifier

Units, rectifiers of 680 W each (one is for redundancy), and a AC Distribution Unit

(ADU). This GIPS and the batteries constitute the dc energy distribution system

used to supply the various modules of the cabinet. The Power System delivers a 54.6

V dc voltage which it generates from the Mains voltage for a 25°C temperature

(77°F) of the probe under the batteries.

2.10.4.1 DCU description

The DCU has the four following separate outputs which supply the modules of the

cabinet:

output PA (--) to the power amplifiers

output DACS (--) to the climatic system fans

output DRX (--) to the DRX, eDRX, or DRX--ND3 units

output BCF (--) to the BCF (CBCF/RECAL /USER) and F--type converters

The DCU also provides a common 0 V output.

DCU protections

The DCU outputs are protected by the following breakers:

output current PA: breaker CB1 (80 A)

output current DACS: breaker CB2 (15 A)

output current DRX: breaker CB3 (15 A)

output current BCF: breaker CB4 (15 A)

When circuit--breakers CB1 or CB3 are tripped, an alarm signal is generated.

A manual power supply cut--off is provided on all four outputs by circuit--breakers

on the front panel of the DCU.

Alarms

Several alarms are provided to the RECAL board by the power system:

AC fault: when 1 out of 3 phases is interrupted or is outside the 172V to 176V

range (single alarm for all seven rectifiers)

DC fault: when the dc supply is interrupted (single alarm for all seven rectifiers)

or if a temperature sensor is not properly linked to the DCU or if a local bias fails

or one slot is empty.

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DCU protection device

Load1 threshold

Main breaker fault

Lightning arrestor fault

Alarm connector

This is a male 15--point SubD connector placed on the top of the DCU.

1Alarm AC OR

2Alarm DC OR

3Alarm load1 threshold

4Common alarms

5Remote Control a

6Remote Control b

7CEATS1

8CEATS2

9NC

10 Mains breaker

11 PCU Protective Devices

12 NC

13 Lightning Arrestor

14 Common Alarm

15 NC

Note: NC = not connected

Table 2--72 Alarm connector

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2.10.4.2 DCU front panel

The front panel includes the following:

Four manual circuit breakers (PA, DRX, DACS, and BCF)

a battery temperature probe connector

four green LEDs

•

The four green LEDs ON indicate that the DCU is operating normally.

•

A green LED OFF indicates that the corresponding module is not powered.

A battery breaker is located above the GIPS.

2.10.4.3 DCU top panel

The top panel includes an alarm interface connector. The alarm connector is male

15--point SubD connector.

2.10.4.4 Rectifier description

Input voltage

Nominal 230 V ac

Range: 176 V ac to 264 V ac

Output characteristics

Nominal output voltage is 54.6 V ±0.2 %.

The output voltage range is 40 V to 58.3 V.

Protection against power surges is 59.7 V.

Nominal current is 12.45 A minimum for Vout = 54.6 V. The output power is

constant (680W) for output voltages between 40 V and 58 V.

Alarms

Several alarm signals are generated, in the following cases:

overtemperature

ac input voltage interrupted or not within 176 V--264 V thresholds

dc output voltage not within 40 V to 58.3 V thresholds

An ac alarm leads to a dc alarm, but a dc alarm does not necessarily lead to an ac

alarm.

Floating voltage control

The floating voltage leaving the rectifiers is automatically adjusted in inverse ratio

to battery temperature. This floating voltage is necessary for an optimum battery

service life.

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2.10.4.5 Rectifier front panel

The front panel includes the following:

a manual circuit switch

a green LED

The LED gives information on the status of the rectifier. The green LED is on to

indicate that the rectifier is in normal operating mode, that is a dc voltage is supplied

at the rectifier output.

2.10.4.6 ADU description

The ADU provides:

the AC input cable

surge protection

a system level circuit breaker for rectifiers power on/off and overload protection

a circuit breaker for DACS power on/off and overload protection

EMI filtering

a connector for the DACS

2.10.4.7 ADU front panel

The front panel includes the following:

three mains circuit breakers:

•

rectifiers 1, 3, 5, 7 Load Circuit Breaker

•

rectiifers 2, 4, 6 Load Circuit Breaker

•

DACS Load Circuit Breaker

DACS cable

main cable

Earth connection point for dielectric test

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Figure 2--31 GIPS

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Figure 2--32 DCU module

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Figure 2--33 ADU module

ArchitectureNortel Networks Confidential 3--1

S12000 BTS Reference Manual

3 ARCHITECTURE

3.1 Physical architecture

3.1.1 Introduction

This chapter provides an overview of the BTS physical architecture. BTS

components are described in detail in Chapters 1 to 5.

The EDGE link quality measurement (LQM) of the uplink is performed at the BTS.

E--DRX and E--PA are necessary on the BTS to utilize the EDGE features.

BSC12000 is required to utilize the EDGE features.

3.1.2 Subsystems

The BTS contains three main subsystems (see Figure 3--1):

one CBCF Module

one TRX subsystem

one coupling system

The content of each subsystem is listed in Table 3--1.

3.1.3 Internal buses

The following buses, which connect BTS components, are described in this section:

frequency hopping (FH) bus

private PCM

Figure 3--1 shows the buses used with the CBCF Module.

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Subsystem Contents*

Compact BCF (CBCF) Module •Compact PCM Interface board (CPCMI)

•Compact Main Common Function board

(CMCF)

•Remote Control Alarm (RECAL) board

•BCF Interconnection board (BCFICO)

•CBCF Back Panel (CBP)

TRX •Driver and Receiver unit (DRX)

•Power Amplifier (PA)

Coupling system •RF Combiner Module(s) of the following

types:

-- Duplexer (D)

-- Hybrid Two--way (H2D)

-- Hybrid Four--way (H4D)

-- Tx Filter(s) (TxF)

•Rx Splitter(s)

•LNA Splitter

* The number of boards or modules are not indicated and depend on the

configuration of the site.

Table 3--1 BTS subsystems

3.1.3.1 FH bus

The FH bus links together all logical DRXs.

The FH bus and the transmitters connected to it ensure the function of frequency

hopping and the filling of the BCCH frequency.

The FH bus is a V11 (series) bus. It is one-way and carries the signals according to

the RS485 standard.

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TRX

DRX

DRX Logic

part

CPCMI CMCF

CBCF (*)

RECAL

Private PCM

DRX Radio

part

Private

PCMs

Note: (*) The two interconnection boards of the CBCF module (BCFICO and CBP) are not shown.

FH bus

Private PCMs

External PCMs

Transmitter coupler

subsystem

Reception coupler

subsystem

Figure 3--1 Subsystem architecture with CBCF

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Each message is transmitted in synchronization with the 4Fbit clock and includes

the following:

the system time in six bytes (flag included)

the address of the DRX that transmits the information in one byte

the code of the send frequency on 10 bits

the send power commands in one byte

the NRZ message of the send data in 19 bytes

Up to 16 transmitters can be connected to this bus.

For multi--cell sites, all the cells can be connected onto a single FH bus.

3.1.3.2 Private PCM

Up to six private PCMs transport data between the DRXs and the CBCF Module.

Each private PCM supports up to four es. Each private PCM has a 64 kbit/s time

slot (TS) distributed to all DRXs and carries the GSM TIME signal (TS31).

Each private PCM allocates the following time slots (TS) for each DRX:

One TS (64 kbit/s logical channels) of transparent data for signaling and 4 TSs

for traffic

A group of five TSs, three of which are used, is allocated to each DRX, as follows:

Signaling Traffic +

Joker

Traffic +

Joker

Traffic +

Joker

Traffic +

Joker

1234 5

A 4.096 MHz clock, slaved to the 4Fbit clock of the synchronization board, is used

for bit synchronization of the private PCM.

The refresh period must be a multiple of an occurrence between the GSM time base

(577 µs) and the PCM time base (125 µs). The selected refresh period is 60 ms.

One must make the difference between CMCF/CPCMI which remain with a single

rate (4.096 MHz clock and 2.048 Mbps datarate) and CMCF/DRX/RECAL which

can have a double rate feature on some TSs(4.096 Mbps double datarate).

The TSs remaining with a single rate are the signaling TSs for the

DRX/eDRX/RECAL and the traffic TSs for the DRX.

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3.2 CBCF functional architecture

The CBCF performs the following functions:

switching, synchronization, and concentration

control of the alarm management unit

PCM Interface

The CMCF Phase2 board performs the concentration, synchronization, and

switching functions. The CMCF also controls the alarm management unit (the

RECAL board), which is located outside the CBCF Module.

The CMCF Phase2 board allows operation in duplex mode and in simplex mode.

The CPCMI board is the interface between the external PCM links (A--bis) and the

private PCMs in the CBCF.

CBCF modes

The CBCF can be used in simplex mode with only one CMCF board in slot 0 or 1

running in active mode. Simplex/Duplex mode is managed by a micro switch on the

CMCF Phase2 board. From duplex to simplex, the transaction is never automatic

and always follows a configuration. From simplex to duplex mode, there is no

automatic transition when the active board detects the connection with the passive

one.

3.2.1 Switching, synchronization, and concentration

The CMCF Phase2 board is duplicated in the CBCF Module to provide redundancy

(see Figure 3--2).

One CMCF central processor manages the switching matrix and the

synchronization. The main processor and slave processor share the concentration

and routing tasks as described below.

3.2.1.1 Switching

The two switching matrices in the CMCF receive and distribute the traffic of PCMs

as follows:

up to six PCMs communicate with the CPCMI boards (external PCM)

up to six PCMs communicate with the DRXs (external PCM)

two PCMs communicate with the processing units (internal PCM)

one PCM communicates GSM time (internal PCM)

one PCM for tests (internal PCM)

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The 6 PCMs distributed towards the DRX can have a double rate.

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1/256

1/193

H8M SY H4M

SYN

FLL

E1/T1

+5V

1/256

1/193

H8M SY H4M

+5V

MASTER CMCF

SLAVE CMCF

PLL : Phase--locked loop

FLL : Frequency locked loop

SYN

PLL

SIX

CLOCKS

SIX

CLOCKS

Figure 3--2 CMCF board synchronization (full configuration)

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3.2.1.2 Synchronization

The CMCF Phase2 board provides synchronization to the radio part of the BTS.

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Synchronization is obtained through a temperature--controlled oscillator that allows

the selection of timing signal from eight signals (six from the external PCMs, one

from an external source, and one from the CMCF Phase2 active).

The selected clock signal is routed to a digital phase comparator that authorizes

synchronization operations in a frequency locked loop (CMCF Phase2 active) or in

a phase locked loop (CMCF Phase2 passive).

The CMCF Phase2 passive operates in a phase locked loop so that its H4M clock

is synchronized with that of the CMCF Phase2 active. This ensures that phase

hopping does not occur during a CMCF Phase2 switchover.

GSM Time

The processing unit transmits the GSM Time every 60 ms. The GSM Time is

transmitted to the switching matrices of the CMCF Phase2 active. The CMCF

passive reads the GSM Time in the CMCF Phase2 active, which allows the

synchronization of GSM Time on both CMCFs.

Figure 3--2 shows the synchronization process on the CMCF Phase2 board.

Switchover

A switchover occurs in synchronization with the H4M clock. Since the active

CMCF and the passive CMCF Phase2 are synchronized (H4M and GSM Time), the

switchover does not cause a timing disruption.

The switchover sequence is as follows:

active CMCF becomes inactive

inactive CMCF detects the inactivity

inactive CMCF becomes active

A CMCF processor becomes inactive in the following circumstances:

H16M clock state is NOK and there is dual chain operation

the active request is disabled

master board is not properly connected to the back panel

the active processor is reset while in dual chain operation

Defence and redundancy management

A switchover from one CMCF Phase2 board to the other in the event of an error on

the active CMCF Phase2 board ensures redundancy. The hardware supports duplex

and simplex modes.

A redundancy channel between both CMCF Phase2 boards ensures the exchange

of data between the boards in the event of a switchover.

The defense connectivity is shown in Figure 3--3.

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MASTER CMCF

SLAVE CMCF

CPCMI

Six Private

PCMs

Six PCMs

Six Clocks

M/S logic witch

Duplex sync

Redundancy link

Figure 3--3 Defense connectivity between the CMCF Phase2 boards (full

configuration)

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3.2.1.3 Concentration and routing

The concentration and routing functionality is performed by the active and passive

processing units. The master processing unit manages the board resources. The

passive processing unit, which operates synchronously with the master unit,

manages one PCM, one HDLC link (for active--passive communication), and one

RS232 link.

The master processing unit receives an external clock signal at 4.096 MHz and

generates a 33 MHz reference frequency. This frequency is supplied to the passive

unit so that it can be synchronous with the master unit.

3.2.2 Control of the alarm management unit

The CMCF Phase2 manages the alarm management unit, the RECAL board, located

outside the CBCF Module.

The RECAL board collects internal and external alarms and routes them to the

CMCF, which routes to the BSC.

The communication between the CMCF Phase2 and the RECAL is done using an

LAPD protocol link that uses a channel supported by time slot 25 of PCM0.

3.2.3 PCM Interface

Up to three CPCMI boards provide the interface between six external PCM links

(A--bis) and six private PCMs used inside the CBCF Module.

The interface tasks correspond to an electrical level translation and a frame format

conversion depending on the type of external PCM link (PCM E1, PCM T1, or

HDSL).

The external PCM interface has functional blocs that perform the following

functions:

conversion of analog signals on the A--bis interface and the logical signals of the

Framer part of the PCMI

management of the synchronization clock

transposition between the A--bis and the private PCMs signals

3.2.3.1 Signalling interfaces

The CPCMI board uses the PCM and HDSL interfaces described below.

PCM A--bis interface

The E1 interface is compatible with the G703 Recommendation. Its impedance is

120 (two pairs of bidirectional symmetrical links) or 75 Ohms (coaxial cables).

The T1 interface is compatible with ANSI T1.403 and T1.102. Its impedance is

100 Ohms (two pairs of bidirectional symmetrical links).

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HDSL A--bis interface

The HDSL--E1 format (2B1Q) is on one single twisted copper pair where the

transmission rate is 2320 kbps for a full E1 frame. This rate is compatible with the

ETSI ETR 152 RTR/TM--06002 standard.

The HDSL--T1 format (2B1Q) is on one single twisted copper pair where the

transmission rate is 1552 kbps for a full T1 frame. This rate is not standardized and

is considered a proprietary link.

Private PCMs

One CPCMI board is connected to two private PCM links (PCM0 and PCM1). The

O&M communication is done through an HDLC link using TS0 of PCM0.

E1/T1

Three bits supplied to the CMCF indicate whether the board is an E1 or T1.

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3.3 DRX functional architecture

The DRX board has a digital part, a radio part and a power supply board

(Figure 3--4).

3.3.1 Types of DRX boards

The DRX boards for S12000 indoor are:

DRX ND3 GSM 900 MHZ

DRX ND module 1800 MHZ

DRX ND PCS 19000 MHZ

E--GSM DRX ND module

The DRX boards for S12000 outdoor are:

DRXNDPCS

DRXNDDCS

DRXNDE--GSM

MOD: DRX ND3 GSM

3.3.2 DRX digital part

The DRX digital part consists of four units:

the Advanced MaNagement Unit (AMNU), which manages the DRX

the Digital Control Unit for eight chanels (DCU8), which is the signal processing

unit

the Time Base Unit (BDT), which manages the GSM_TIME for the DRX

TX logic, which is the interface with the transmission part in the DRX Radio

board

3.3.2.1 AMNU unit

The AMNU unit manages the DRX. It manages the eight time slots of a TDMA

frame and the radio signaling functions.

These functions can be broken down into communication functions (RSL) on the

one hand, and operating and maintenance functions (O&M) on the other (see

Figure 3--5).

Communication functions

Communication functions include:

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routing functions

concentration functions

Routing functions

The TDMA frame management unit routes messages from the BSC. The messages

arrive on the RSL and can be broken down into two categories:

messages concerning processing of a single time slot

messages concerning all the time slots in the TDMA frame

Concentration functions

There are two types of messages:

transparent messages

non--transparent messages

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AMNU

DCU8

Test Ethernet

BDT

DRX digital

bus

Private PCM

Radio DRX

Logical TX

Power

supply

board

+5.4V

+ 12V

-- 12V

+ 48Vdc

Frequency

reference

unit

Figure 3--4 DRX board: functional block diagram

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SPU

AMNU

BSC

O&M

Communication

function (RSL):

-- routing

-- concentration

Level 1 radio access

Level 1 radio

Level 2 radio management

Radio

resources

management

Radio

measurements

management

Operations &

Maintenance

functions (O&M)

Level 3 radio

Level 1 wires

Level 2 wires

Figure 3--5 AMNU functions

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Transparent messages are simply concentrated on a time slot of the internal PCM.

Non--transparent messages are:

radio measurement messages of the mobile

interference measurement messages on the inactive channels

load messages on the RACH channel

load messages on the PCH channel

Non--transparent messages are transcoded, averaged and grouped in a single

message to the BSC. This message is sent to the same time slot as the transparent

messages.

Operation & Maintenance functions

The following Operation & Maintenance functions are processed by the Frame

management unit (AMNU):

start--up, downloading, initialization

configuration

monitoring/defense

Start--up/Downloading/Initialization

The AMNU is started by a hardware reset or a reinitialization message sent by the

BSC. It causes configuration of the LAPD and establishment of the OML link with

the BSC.

The DRX subsystem can be downloaded only after the BCF is downloaded, and

the units of site management, cell management, and Abis signaling of the DRXs

have been configured.

The BSC systematically initiates a downloading phase of the catalogue files and of

the following software units:

AMNU

SPU

DLU

BOOT

BDT

BIST of the SPUs

A re--flashing of the units for which the software versions are different follows the

downloading.

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Configuration

The DRX is configured by the BSC by means of an OML link on the Abis interface.

Configuration can be broken down into:

a general configuration:

•

configuration of the TDMA frame

time slot configurations:

•

configuration of radio time slots

•

configuration of the frequency hop

Configuration of the TDMA frame provides the DRX with parameters shared by

the whole cell, such as:

cell identity (BSIC)

BCCH frequency

indication of frequency hopping implementation

cell type (normal or extended)

and with parameters specific to the DRX:

the frequency of the TDMA frame if there is no frequency hopping

indication of implentation of diversity in reception

The TDMA frame cannot be dynamically configured. A change of configuration

requires re--start of the downloaded software.

The configuration of the radio time slot specifies the type of logical channel to use

for a time slot.

The configuration of the frequency hopping specifies, for a time slot, the list of

frequencies to use as well as sequencing. This configuration is optional and only

appears if the frequency hopping was requested in the TDMA frame configuration.

Monitoring

The BSC regularly sends status requests to the DRX to detect any problems on the

OML link.

LAPD break

The LAPD, OML and RSL links are monitored by a timer. If level 2 loss is detected,

the BSC and the AMNU try to reconnect. If connection has not been made by the

end of the time--out, the AMNU is reinitialized.

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Event reports

The AMNU collects all events detected by the DRX equipment. It performs

filtration, and sends error reports to the BSC. Transmission error reports and fault

management on RX--splitters alarms are sent through the CBCF.

The AMNU filters to prevent repetition of non--transient events, which means it can

send the BSC a single indication.

The AMNU sends errors to the BSC by sending “event report” messages. There are

two types of “event report” messages:

transient messages, which are not acknowledged by the BSC

non--transient messages, which must be acknowledged by the BSC, and which

are repeated by AMNU until they are acknowledged

Radio signaling function

The radio signaling function supports two Signal Processing Units (SPU). Each

SPU manages one time slot.

Two versions of the SPU software are available. One corresponds to propagation

conditions in rural areas and the other to propagation conditions in urban areas. For

rural areas, the algorithm parameter is set at zero. For urban areas, the alogrith

parameter is set at 0.5, and the interferer cancellation algorithm is active.

The radio signaling functions can be broken down into four groups of functions:

level 1 radio access

level 2 radio management of LAPDm signaling

level 3 radio management, which is made up of two functions:

•

radio resources management

•

radio measurements management

operation & maintenance

Level 1 radio access

Level 1 radio access makes it possible to manage dialogue between the AMNU

signaling function and the SPU processors that are connected to the AMNU. It

offers:

configuration of operating modes for each SPU

SPU control

transmission and reception of data on the radio channel, respecting methods for

slaving to the radio frequency

Level 2 radio management

Level 2 radio management manages the LAPDm level 2 signaling on the radio

channels.

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Radio resources management ( level 3 radio)

Radio level 3 provides the following functions:

level 2 management on the common channels

control of level 2 functions on dedicated channels

activation of the common channels

organization of the Common Control CHannel (CCCH), including chaining and

repetition of paging messages and transmission of dedicated channel allocation

messages

activation or deactivation of dedicated channels, implementation of encryption

and channel mode changes

providing SPU processors with system information on the SAACH and BCCH

channels

detection of “random access” and “handover access”

detection of paging channel (PCH) load

detection of radio link attenuation (monitoring of the upstream SACCH

channel), verifiable by the OMC

sending of the mobile transmission power change

Radio measurements management (level 3 radio)

This provides the following functions:

return of interference measurements carried out by the SPU processors on the

inactive dedicated channels and transmission of these measurements to the

AMNU

concatenation of measurements made by the SPUs on the active dedicated

channels and those transferred by the mobile over the same period

Operation & maintenance functions (O&M)

These functions provide configuration and deconfiguration of the time slots and

frequency hopping functions.

Network ID

With the implementation of V15.0, the BTS detects the type of DRX and PA during

connection with respect to the BCF and the DRX. Note the following restrictions:

If a DRX is not yet connected to the BCF, its type is set to “DRX type” until it is

connected.

If a PA is not yet connected to the DRX, its type is set to “PA type” until it is

connected.

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If a fault beginning has been sent on the DRX type (or PA type) of equipment,

because the real equipment type was unknown, the fault ending must be sent on a

DRX or PA type, even if the DRX or PA have connected themselves between the

fault begin and fault end.

EDGE implementation

In V15.1, the BSC can configure one TDMA with up to:

8 DS0 (joker and main) per TRX (with CBCF, CMCF Phase 2)

The joker channel is used when the size of the frame exceeds the size of the main

channel, which is the case for CS3/CS4 in GPRS and MCS3 to MCS9 in E--GPRS.

In that case, the main channel is filled with the maximum information (i.e 302 bits

of payload) and the remainder is split into N equal pieces that are sent in the Joker

channel during the same 20ms period. In order to save PCU CPU Power, the content

of the jokers is aligned on a byte boundary.

As the maximum number of joker TS per TDMA is directly linked to the type of

site, the following rule is mandatory: both chains of the site must have the same level

of hardware.

If this rule is not verified: see the engineering rules for more details.

3.3.2.2 DCU8 unit

The DCU8 unit consists of two signaling processing chains, A and B, as shown in

Figure 3--6. Each chain handles four calls in full--rate voice mode and eight calls

in half--rate voice mode. Chain A and chain B are connected to a subassembly, the

BB_FILT ASIC, which is the interface with the radio part and filters reception

samples before sending them to the two chains. A second subassembly, the CHIF,

which is associated with the BB_FILT ASIC, calculates encryption and decryption

masks.

Chain A processes even radio reception time slots and odd radio transmission time

slots. Conversely, chain B processes odd radio reception time slots and even radio

transmission time slots.

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BB_FILTCHIF

RAM

AMNU

DSP DECOD DSP DECOD RAM

DSP TRANS DSP TRANS

RAM RAM

Receivers

FH bus

GSM TIME bus

SPU (A Chain) SPU (B Chain)

DSP EGAL

DPRAM DPRAM

Figure 3--6 DCU8 unit diagram

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The DCU8 unit has five DSPs:

one EGAL DSP, which equalizes the reception signal

two DECOD DSPs, which handle reception signal decoding and level 1

sequencing

two TRANS DSPs, which handle transmission signal processing, encoding, and

the interface with the remote transcoder

There is one DECOD DSP and one TRANS DSP in each chain.

SPU

The SPU carries out processing associated with the transmission layer (see

Figure 3--7 and Figure 3--8). Its functions are:

demodulation of GMSK signal at reception

ciphering/deciphering of sent and received data

encoding/decoding and interleaving/de--interleaving of data from the various

channels

encoding/decoding of voice and data (from 13 kbit/s to 16 kbit/s and vice--versa)

transfer of discontinuous transmission (DTX) signal

control of transmitters (GSMK--8PSK) and receivers

processing of radio measurements

Demodulation function

Demodulation consists of extracting the binary data transmitted from the GMSK

signal received, which is 144 bits for a normal burst and 36 bits for an access burst.

This is done for the eight time slots of the radio channel.

The demodulation principle selected takes into account the inter--symbol

interference resulting from smoothing of the transmission phase transitions

(limitation of the transmitted spectrum), multiple path phenomena, and distortion

introduced by the channel filter upon reception.

Implementation of this type of demodulator requires modification of the

transmission channel as concerns pulse response, frequency deviation, and

reception times. Determining these parameters is part of the job of the demodulation

function.

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AMNU

SPU

Demodulation

Deciphering (optional)

De--interleaving

Decoding

Speech/data

or signaling

Speech/data

08.60 format coding

Signaling

Receiver

management

DRX radio

Figure 3--7 SPU reception functions

SPU

AMNU

08.60 format

decoding

Transmitter

management

Coding

Interleaving

Ciphering (optional)

Signaling Speech/data

DRX radio

Figure 3--8 SPU transmission functions

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The receiver executes the space diversity function. Both received channels are

combined in an equalizer which carries out joint equalization.

For each of these channels, the pulse response as well as the C/I+N ratio are

estimated. These ratios are used to weight the predictions and samples of each

channel.

The symbols from the equalizer are then decrypted, de--interleaved and decoded to

restore the control messages and traffic sent by the mobile.

Ciphering/deciphering function

The fluxes of binary symbols sent and received on each time slot on the TCH or

SDCCH are encrypted one bit at a time, in compliance with the

ciphering/deciphering algorithm.

The ciphering or deciphering operation protects confidentiality of voice and

signaling. It consists of adding binary bits, one by one, between sent and received

data and a binary train (the ciphering sequence), generated from a ciphering key and

the TDMA frame number of the time slot.

Encoding/decoding and interleaving/de--interleaving functions

All traffic and control logic channels are encoded to protect useful information

against transmission errors. Each channel has its own encoding scheme, usually

including the following steps for each block:

protection of data bits with parity bits or a block code

encoding of the “data bits + check bits” unit with a convolutional code. This

operation results in encoded bits.

rearrangement and interleaving of the encoded bits

burst formating

For data, the encoding procedure depends on the rate: the interleaving level is

higher for data than for voice.

Some channels do not use the encoding schemes described above, in particular the

RACH, FCCH and SCH channels. For these channels, interleaving on several time

slots does not exist.

Mobile transmission timing advance function

The BTS must measure the delay on the received signal when the mobile station

makes itself known.

This measurement, known as timing advance, is forwarded in the dedicated channel

assignment message (immediate assignment) to the MS, which uses this parameter

to anticipate its transmission timing.

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During call establishment, the BTS computes the timing advance value and sends

it within CHANNEL REQUIRED message to the BSC. If this value is above the

threshold, then the BSC rejects call establishment.

In ongoing call conditions, the timing advance is calculated at regular intervals and

sent to the MS over the downlink SACCH channel.

The calculation is based on

other measurements taken during demodulation

the timing advance used by the mobile station that is returned in the layer 1

header of the uplink SACCH

Discontinuous transmission (DTX)

Discontinuous transmission allows signals to be sent over the radio channel alone

when a speech signal is present. This limits interference and MS power

consumption. For each call, the MSC indicates whether the BSS “does not use” or

“may use” the DTX.

The principle behind discontinuous transmission is as follows:

The base or mobile vocoder has a Voice Activity Detector (VAD) that detects if the

frame constructed every 20 milliseconds contains speech. If the frame does not

contain speech, the vocoder constructs a special frame called the SIlence Descriptor

(SID) that contains all the background noise description elements. This frame is sent

to produce a comfort noise at the far end, and radio transmission stops.

The vocoder periodically reassesses the ambient noise and reconstructs the SID

frame. The frame produced in this way is sent in step with the SACCH (once every

four 26-frame multiframes, or 480 milliseconds).

When the vocoder detects new speech activity, a special SID frame indicating the

End Of Silence (EOS) is sent, and normal speech frame sending resumes.

On the receive end, additional processing sequences interpret the incoming traffic

frame types (speech, SID, FACCH, nothing) using the related flags (BFI, SID, TAF)

and perform the appropriate operations.

The DTX is allowed for data in non-transparent mode.

BCCH filling

The BCCH frequency must be transmitted continuously so mobile stations can

perform field strength measurements in neighbouring cells.

Continuous transmission is accomplished in various ways:

When frequency hopping is not used, the TRX uses the BCCH frequency as the

carrier frequency for all the channels it supports. The TRX sends fillers on the

BCCH frequency although it may have nothing to send in a given time slot.

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When frequency hopping is being used, one of the following occurs:

•

The hopping laws authorize permanent BCCH transmission, and all the TRXs

help fill operations.

•

The hopping laws do not authorize permanent transmission and a transmitter

is required to enable BCCH “filling” independently and take over when the

hopping laws step down.

Transmitter and receiver control

The SPU controls a transmitter and a receiver. It calculates the frequency hopping

law and determines the frequencies to synthesize.

The transmitter is controlled by the FH bus. The SPU sends the following to the

transmitter:

the power and frequency to use

the bits to send

the time synchronization signal

The SPU sends the following to the receiver:

the frequency to use for the following time slot

the synchronization clock signal

the GSM TIME synchronization signal

The SPU receives the following from the receiver:

digitized samples from the reception channel

the scale factor (gain)

the receiver alarms

Radio measurement processing

The Radio Measurement Processing performed by the BTS ensures that the network

and the mobiles can communicate with each other with minimum interference at the

lowest possible transmission power and with the best transmission quality.

Measurements processed by the BTS include signal strength and signal quality. The

mobile takes measurements in the downlink direction (BTS --> MS), while the BTS

takes them in the uplink direction (MS →BTS). Other measurements include signal

strength on the BCCH frequency of the surrounding cells and the MS_BS distance.

The BTS averages these measurements for each connection. The averaged

measurements are then used as the basis for a decision--making process for the

following:

power control

call clearing

inter--cell handover

intra--cell handover

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The BTS cyclically sends to the BSC the interferences measures done on the

inactive channels.

BB_FILT ASIC

The BB_FILT ASIC constitutes the interface between the signal processing unit

(SPU) of the DRX and the radio RX module on the one hand, and the enciphering

ASIC on the other hand. It carries out the band--pass filtering of the digital samples

output by the radio RX module, and generates the FH bus.

A single BB_FILT ASIC processes all eight TSs of the radio frame.

The functions provided by this ASIC include:

GSM time reception interface providing the synchronization of the DSPs on the

radio frame

on transmission:

•

recording of the TX parameters and of the ciphering key, supplied by the DSP

EGAL

•

transfer of the ciphering key to the CHIF ASIC

•

reading of the ciphering template from CHIF ASIC

•

ciphering of the parameters and transmission on the FH bus

on reception:

•

recording of the RX parameters and of the ciphering key, supplied by the DSP

EGAL

•

programming of RX hopping synthesizers

•

generation of channel and sampling frequency selection signals for the analog

to digital converter

•

base--band filtering of the digital samples delivered by the dc converter

•

selection of the best gain for each channel (normal and diversity)

•

transfer of these selected filtered samples to the DSP EGAL

•

transfer of the deciphering key to the CHIF ASIC

•

reading of the deciphering template from CHIF ASIC, and transfer of the

template to the DSP EGAL

3.3.2.3 BDT unit

The BDT (time base) unit regenerates GSM TIME signals. The GSM time is

distributed to the BDT unit of each DRX by means of the GSM TIME channel of

the private PCM every 60 ms.

The value of the propagation delay is sent to the DRX by means of the OML link

of the private PCM. From these two data, each DRX makes the necessary

corrections and regenerates the GSM TIME bus.

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If, for any reason, the GSM time is not distributed on the BDT unit, the BDT unit

locally maintains the GSM TIME bus signals and continues to provide the GSM

time to the DRX units.

The BDT unit is made up of a logic block and a calculation block.

Digital block

The BDT unit receives a 26 MHz clock signal derived from the radio unit clock. This

clock signal has the same stability properties as the 4Fbit clock signal provided by

the BCF synchronization board and is more stable in the short term. The digital

block generates the following signals:

H4M (4.096 MHz)

STRTM (recurrent pulse at 577 microseconds)

TIME_DATA (containing T1, T2, T3 and TN)

Calculation block

The calculation block synchronizes the H4M and STRTM signals with the

synchronization unit signals of the BCF. In addition, it updates the values T1, T2,

T3 and TN.

The synchronization principle consists of forcing a divider--by--24 counter to divide

by 23 (if the BDT is slow) or by 25 (if it is fast). This way, every 23 or 25 periods

of 26 MHz (depending on whether the slow BDT is accelerated or the fast BDT is

slowed down), the BDT corrects a period of 26 MHz.

3.3.2.4 TX logic unit

The main role of the TX logic unit is to control the radio subassembly in real time.

It receives the BCF configuration commands from the AMNU. It carries out the

processing and sends back reports.

Once configured, the TX logic unit reads, on each time slot, the data present on the

FH bus. Then it calculates the frequency code and the power code to be used with

the radio interface.

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Transmission power

In general, radio power is determined by two inputs. One controls the maximum

static power and the other gives the dynamic attenuation at each time slot.

The static power is given by the CBCF in the CONFIG message. The TX calculates

attenuation to compensate for cable loss between the TX--driver and the power

amplifier.

The dynamic power is provided by the ASIC of the TX logical unit. Its software

reads the value and commands the TX--driver accordingly.

In the case of a BCCH filler, the additional attenuation introduced is always zero.

The power values that the TX and the mobile have to use are fixed by the BTS

according to a control algorithm using the measurements results that it makes and

the thresholds stockpiled in the OMC. The mobile and the BTS power control can

be inhibited by the OMC.

The power control aim is to minimize the interferences, ensure good transmission

quality, and save the mobile’s batteries.

Power slaving

The setpoint value is slaved to compensate for gain variations of the transmission

chain.

Two slaving loops are used to compensate for attenuation in the gain chain.

DRX

TX LOGIC

External loop

GMSK Modulation

Internal loop

Radio Frequency

Antenna

TX DRIVER

Control bus

PA or LPA

Figure 3--9 Power slaving diagram

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These loops can be in the following states:

Open: This state is used for calibration of the internal loop with the external loop.

Initialization: This state is used for loop start--up.

Error: A loop is in error when it is not longer in correspondence with the setpoint.

Closed: A loop is closed when it is in slow slaved mode.

3.3.3 DRX radio part

The DRX radio part is composed of a power supply board and of the DRX radio

board.

The power supply converts common -48 V to specific +5 V/±12 V power supply

signals for the DRX radio board.

The DRX radio board is composed of three units:

the Frequency reference (Fref) unit

the receiver unit (RX)

the transmitter unit (TX)

The DRX boards for S12000 indoor are:

DRX ND3 GSM 900 MHZ

DRX ND module 1800 MHZ

DRX ND PCS 19000 MHZ

E--GSM DRX ND module

The DRX boards for S12000 outdoor are:

DRXNDPCS

DRXNDDCS

DRXNDE--GSM

MOD: DRX ND3 GSM

3.3.3.1 Frequency reference unit

The reference frequency for all local oscillators is derived from the Fref frequency

supplied by the VCXO, itself derived from the 4.096 MHz signal provided by the

DRX digital part (CBCF).

It provides a very steady and spurious--free reference clock for the RX/TX hopping

and fixed synthetizers (13 MHz signal).

3.3.3.2 Receiver unit (RX)

The receiver unit (RX) has four main functions. Slot--to--slot frequency hopping is

achieved with a dual synthetizer arrangement, that is, one is active while the other

is setting to the following frequency. The RX main functions are:

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signal down conversion from radio frequency band to Intermediate Frequency

(IF) then to base band frequency

channel filtering (in IF)

RX--level dynamic management

digitization of the base band signal

The base band signal is then sent in binary form with its scale factor to the DRX

digital part. The receiver unit works on signal GMSK and on signal 8--PSK.

Receiver configuration

The receiver configuration is done by the DRX digital part, which sends:

the reception frequency to be used for the following time slot

the synchronization clock signal

the GSM time synchronization signal

Receiver monitoring

The receiver monitors internal equipment: microprocessor and Phase Lock Loops

(PLL).

If there is a failure or other problem, it generates alarms to signal:

microprocessor fault

frequency range not respected (if the frequency to synthesize as requested by the

DRX digital part is incorrect)

PLL loss of alignment (if one of the receiver PLLs is not aligned)

3.3.3.3 Transmitter unit (TX)

The Transmitter unit has two main parts:

IF and RF chains

gain control loop (or Automatic Level Control)

IFandRFChain

An I/Q modulator with a Local Oscillator (LO) phase--locked on a reference

frequency transposes the two baseband I/Q signals into the IF chain.

This 125 MHz local oscillator (LO_IF) phase--locked on a 13 MHz signal translates

the baseband signals into an intermediate frequency. (The IF is 125 MHz in

GSM 850 and 299 MHz in GSM 1900).

The second LO is used for up conversion from IF to RF.

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The up--conversion is followed by bandwidth filter, amplifier stages, variable

voltage attenuators, and digital attenuators.

The transmitter unit works on signal GMSK and on signal 8--PSK.

Gain Control Loop (or Automatic Level Control)

The driver transmit chain upholds the accuracy of the transmission power

compatible with the GSM recommendations against time.

The control dynamics use two components: one voltage variation attenuator (VVA)

and a step--by--step digital attenuator that takes target attenuation into account and

compensates for it.

The Automatic Level Control also includes the PA.

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3.3.4 DRX shutting down

3.3.4.1 DRX soft blocking

The DRX soft blocking consists in setting a DRX “out of service” without stopping

the calls established on this DRX. If possible, an intra--cell handover is performed

for those calls to release the DRX more quickly. Otherwise, the DRX will be

released after the normal completion of the calls.

3.3.4.2 DRX soft blocking coupled with a forced handover

To speed up the DRX shutting down, the DRX soft blocking can be coupled with

a forced handover. The calls will be handed over a neighbour cell if the signal

strength is over the handover threshold for that cell.

3.3.4.3 Hint

DRX soft blocking and DRX soft blocking coupled with a forced handover can be

combined into one command. This allows greater efficiency in DRX shut--down.

3.3.5 Power supply board

The power supply card provides a dc voltage between 40.5 V and 57 V, to be

converted into +5 V, +12 V and --12 V. The 48 V voltage is sent first to the logical

DRX unit converter, then, after filtering, to the logical DRX unit and the radio DRX

unit converter.

The power supply of the board varies according to the DRX types and on the

frequencies.

The mechanical and electrical grounds are linked to the common reference zero

volts.

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3.4 e--DRX functional architecture

The e--DRX board consists of (see Figure 3--10):

an e--LDRX digital board including a dc/dc converter, a frame processor TX

logic (GMSK and 8--PSK modulation), and a local time base, working for all

frequency bands

an e--RDRX radio board including a dc/dc converter, a low power driver and a

dual receiver

3.4.1 Modifications between the DRX and e--DRX

This paragraph describes the modifications between the current DRX and the

e--DRX. The main features of the e--DRX are:

signal processing capacity improvement

8--PSK modulation compatibility

receive dynamic extension

TX output power dynamic reduction

packet backhaul readiness

double current on internal PCM

3.4.1.1 e--LDRX board modifications

The main modifications concerning the e--LDRX board are:

the migration of BDT, AMNU, and TX into a single FPGA

the use of one PowerQuicc

the introduction of the 52 MHz frequency reference function

the use of two DSP

the extension of the memory capacity (8 Mb for SDRAM, 4 Mb for flash and

2MbforSRAM)

the size reduction and integration of the dc/dc converter on the e--LDRX board

the lower power consumption (<15W)

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Ethernet

e--LDRX digital board

bus

Private PCM

e--RDRX radio board

DC/DC

converter

DC/DC

converter

Debug

Radio

reception

Radio

transmission

Power

supply

Figure 3--10 e--DRX board: functional block diagram

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3.4.1.2 e--RDRX board modifications

The main modifications concerning the e--RDRX board are:

the removal of the 104 MHz frequency reference

the use of RXIC2 module (IF => BF transposition)

the RX dynamic extension provided by an AGC (--13 to --110 dBm)

the TX output power dynamic reduction

the integration of the dc/dc converter on the e--RDRX board

the lower power consumption (<15W)

double rate on internal PCM

3.4.1.3 e--DRX mechanical/electrical modifications

The main mechanical and electrical modifications applied on the e--DRX are:

RF shielding provided by a single cover

new cooling method: direct forced convection for Digital board

CMS connectors between e--LDRX and e--RDRX

new RF connectors (long thread)

Radio and Digital DC/DC converters are mounted respectively on e--RDRX and

e--LDRX.

CMS DC/DC converters

+5V output e--RDRX DC/DC converter coupled with --5V and +12V discrete

DC/DC converter.

dual tunable output +3.3V/+2.5V or +1.8V e--LDRX DC/DC converter coupled

with +5V discrete DC/DC converter

3.4.2 Main external connections

3.4.2.1 Private PCM

A private internal PCM is used to link the e--DRX to the BCF. The proprietary

interface has the same definition as the previous internal PCM, except that the clock

is fully synchronous with the radio interface.

This bus carries the following information:

Radio Signaling Link (RSL) and local Operation and Maintenance (OML) on

one time slot

Traffic links on two, three, four, six or eight time slots

GSM_TIME channel on a separate time slot

The feature allows the e--DRX to be remotely controlled.

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TheTSsforOML/RSLandGSMTimehaveasingleratewhereastheTSsfortraffic

may have a double rate when requested by the CMCF Phase2 board.

Furthermore, the eDRX matrix may also have a double rate when requested by the

CMCF Phase2 board.

3.4.2.2 FH bus

The FH bus defined for the S4000 BTS is used, allowing frequency hopping and

S4000 BTS compatibility. HDLC bus is no longer supported on the e--DRX.

3.4.2.3 e--PA and HePA Control

an asynchronous bi--directional serial link operating in duplex mode carrying at

each RF time slot the mean RF output power of the associated e--PA or the HePA,

its temperature, and e--PA and HePA internal alarms (temperature, current,

VSWR)

a discreet burst synchronization signal. The e--DRX e--PA and e--DRX HePA

Control interface is compatible with both the standard PA, HePA, and the

standard e--PA.

3.4.2.4 Power Supply

The e--DRX is powered by a --48V dc supply. Typical consumption is 25W.

3.4.2.5 Test links

The e--DRX has an Ethernet 10/100 baseT port and an asynchronous serial port. It

also has serial lines for emulator connections, and real time trace facilities.

3.4.2.6 RF interfaces

The e--DRX unit provides RF reception with diversity and RF transmission at low

level.

Low level GMSK RF Output (--3dBm typical / 50 Ohms)

RF Input Main and RF Input diversity (--84 dBm to 0 dBm / 50 Ohms RF inputs

multiplexed with provisional +12V dc. Supply for RF devices (splitters).

3.4.3 e--DRX functional description

This paragraph describes the functional architecture of the e--DRX, but does not

detail each part. The aim is to give enough information to easily approach the main

features.

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3.4.3.1 Logic unit (e--LDRX)

The logic unit (e--LDRX) contains (see Figure 3--11):

an FPGA unit which provides:

•

a control and switching matrix management function

•

a time base function

•

a synchronization function

a management unit (AMNU) which processes:

•

start--up, downloading, initialization

•

configuration

•

monitoring

•

LAPD break

•

event reports

a transmission unit which provides:

•

a radio signaling function

•

a signal processing function

•

a power regulation function

•

a RX logic function

•

a TX logic function

FPGA unit

Control and switching management function

Setting up by setup of e--DRX for AMNU, transmission, and other functions

When the BTS is activated, it must be connected to the BSC to work. A link is set

up on an external PCM link.

Downloading

When communications have been set up with the BSC, the BTS reports its status.

The BSC downloads, if necessary, the software to the BTS.

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RX logic function TX logic function

Transmission

unit

FPGA unit

Logic unit (e--LDRX)

Processing signal

function

(SPU)

Radio signaling

function

Power regulation

function

Management unit (AMNU)

Synchronization

function

Control and switching

management function Time base

Radio unit (e--RDRX)

Figure 3--11 Logic unit (e--LDRX): functional architecture

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Synchronization management

At the start--up, the BTS selects the clock. During LAPD connection, the BTS

forces the clock onto the PCM carrying the LAPD.

The e--DRX board recognizes the S12000 thanks to the SEL and adapts to the

private PCM mapping.

Switching matrix management

Each PCM link managed by the switching matrix has a transmission test

interface, reception test interface, and an idle interface.

The switching matrix is configured when the BSC requests set up or release of a

signaling or traffic channel from the BTS.

Signaling channels are set up (or broken) between a transmission signaling TS

and a non--concentrated link. This operation may entail (dis)connection between

a concentrated link TS coming from the BTS and a PCM link TS on the PCM

interface.

Traffic channels are set up (or broken) between a transmission traffic TS and a

PCM link TS on the PCM interface.

Data signaling concentration function

The BTS uses this function to set up the communication between the BSC and the

other entities that make up the BTS. This function is implemented with the

LAPD protocol that serves concentrator and routing functions.

Time base

The time base regenerates the GSM_TIME bus with information issued from the

GSM_TIME channel.

If for any reason the GSM time is not distributed to the time base, the time base

maintains the GSM_TIME bus signals locally and continues to provide the GSM

time to the logic unit.

Synchronization function

The synchronization function must synchronize the transmissions on a single

reference time: GSM _TIME.

The network provides a radio reference clock via two PCM links that ensures

long--term accuracy. This clock is used by the synchronization module to generate

an exact reference time for the radio interface.

If the external reference signal is missing, the BTS selects the local clock.

The synchronization function is monitored by internal control and monitoring

mechanisms. These mechanisms ensure that the synchronization is operating

correctly and that the GSM time is available on the GSM_TIME bus.

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AMNU

The AMNU (Advanced MaNagement Unit) monitors site and transmissions and

manages the eight time slots of a TDMA frame.

The following functions are processed by the frame management unit (AMNU):

start--up, downloading, initialization

configuration

monitoring

LAPD break

event reports

Start--up, downloading, initialization

The AMNU is started by a hardware reset or a re--initialization message sent by the

BTS. It configures the LAPD and establishes an OML link with the BSC.

Depending on the BSC request, the BTS systematically initiates a downloading

phase of the catalogue files and the following software units:

boot software and operating system: BOOT

TRX monitoring and maintenance software: OML AMNU

site monitoring and maintenance software: BCF

test software: TOOLS

TDMA1 & TDMA2 radio signaling link management software:

RSL1 & RSL2

hardware configuration DLU: DLU

A reflashing of the units for which the software versions are different follows the

downloading.

Configuration

The transmission is configured by the BSC via the BTS.

The configuration provides:

a general configuration. It contains the configuration of the TDMA frame and

provides the logic unit parameters shared by the whole cell, such as:

•

cell to identity (BSIC)

•

BCCH frequency

•

indication of frequency hop implementation

•

the frequency of the TDMA frame if there is no frequency hopping

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a configuration of the radio TS. It specifies the logic channel type to use for TS.

a configuration of the frequency hop. It specifies, for TS, the list of frequencies to

use as well as sequencing. This configuration is optional and only appears if the

frequency hop was requested in the TDMA frame configuration.

Supervision

The BTS regularly sends status requests to detect any problems.

LAPD break

A timer monitors the LAPD with the OML and RSL links. If level two loss is

detected, the BSC and the AMNU try to reconnect. If connection is not

re--established before the end of the time--out, the AMNU is reinitialized.

Event reports

The AMNU:

collects all events detected (internal or external alarms)

provides the filtration and reports errors (transmission/reception) to the BSC

provides the filtration to prevent repetition of non--transient events, which means

it can send to the BSC a single indication

The AMNU sends errors to the BSC by sending “event report” messages through

the BTS. There are two types of messages:

transient messages which are not acknowledged by the BSC

non--transient messages which must be acknowledged by the BSC and which are

repeated by AMNU until they are acknowledged

Transmission unit

Radio Signaling function

The main characteristics of this function are:

radio access management (level 1)

It manages a dialog between the AMNU signaling functions and the signal

processing function (SPU), which are connected to the AMNU.

radio management (level 2)

It manages the LAPDm level 2 signaling on the radio channels.

radio resources management (level 3)

It provides level 2 management on the common channels and control of level 2

functions on dedicated and common channels.

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radio measurements management (level 3)

It provides the return of interference measurements carried out by the one

signal--processing unit on the inactive dedicated channels and transmission of

these measurements to the AMNU.

Operation & Maintenance functions (O&M)

They provide configuration and unconfiguration of the TS and frequency

hopping functions.

Signal Processing function

The signal processing (SPU) function performs processing associated with the

transmission layer executes a number of functions, such as:

modulation/demodulation (GMSK or 8--PSK)

ciphering/deciphering of sent and received data

coding/decoding and interleaving/de--interleaving of data from the various

channels

processing radio measurements

mobile transmission timing advance function

discontinuous transmission (DTX)

BCCH filling

transmitter and receiver control

Power regulation function

The Power regulation function performs instantaneous checks on the associated

radio subset. It receives configuration instructions via the AMNU unit, launches

processing, and returns reports.

When the function is configured, each TS in attendance on the FH bus is in ready

state. Then the function calculates the frequency and the power code to be applied

to the radio interface. Each function acts as a control of the set point (emission

power), to improve the non--linearity of the gain of the transmission chain.

It launches the following:

frequency hopping management

power slaving

transmission power

alarms management

RX logic function

The logic functions

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maintain the interface between the SPU functions with the RX radio functions on

the radio unit (e--RDRX) and the ciphering Uplink/Downlink.

filter the digital samples, provided by the RX radio functions, to base band

signals

generate the FH bus

Each RX radio functions processes the eight TSs of the radio frame.

The main characteristics of the RX radio function are:

an interface for the reception of the GSM time to maintain the DSP

synchronization on the radio frame

for the transmission:

•

the recording transmission parameters and the cyphering key

•

the parameters cyphering and the transmission on the FH bus

for the reception:

•

the recording of the reception parameters and the ciphering key

•

the base band filtering of the digital samples provided by the converter

•

the ciphering key moving

TX logic function

This function maintains the interface between the SPU functions and the TX radio

functions of the radio unit (e--RDRX).

The TX logic function processes the eight TSs of the radio frame.

It ensures the digital/analog conversion of samples, and receives:

information about the burst bits, from the RX function and via the FH bus

modulated signal samples, according to the modulation format previously set

digital data (alarms, output power, etc.), from various equipments of the analog

part of the transmitter

ensures corrective actions

3.4.3.2 Radio unit (eRDRX)

The radio unit (see Figure 3--12) processes the radio channels for

transmission/reception function.

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The e--DRX board includes the following functions:

power supply unit

receiver unit and transmitter unit

frequency reference unit

Power supply unit

The power supply unit converts common -48 V to specific +5 V/+12 V power

supply signals for the e--DRX radio board.

Frequency reference unit

The reference frequency is synthesized by 13 Mhz Phase--Locked--Loop,

referenced with the 4.096 MHz (H4M) provided by the digital board.

Transmitter unit

The transmitter unit contains the transmission channels of lower power which

manage the Radio Frequency (RF) signals (GSMK or 8--PSK) and Intermediate

Frequency (IF) signals as follows:

I/Q modulation

IF filtering and amplification

IF and RF transposition

RF band filtering

amplification and variable attenuation

output power control

Receiver unit

The receiver unit includes the reception radio channels which manage the RF

signals (GSMK or 8--PSK) and the IF signals as follows:

RF signals from LNA--splitter

RF to IF transposition

IF channel filtering and amplification

RF to BF transposition

Analog--to--digital conversion

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Amplification RX module

(LNA--Splitter)

Amplification TX module

(LPA)

Radio unit

(e--RDRX)

RX1 (RF)

RX2 analog--to--digital

converter

Logic unit (e--LDRX)

TX1 (RF)

Frequency translation

(IF/RF)

RX1 (IF) TX1 (IF)

RX radio

function

TX radio

function

Frequency translation

(LF/IF)

Frequency translation

(LF/IF)

Frequency translation

(IF/RF)

Figure 3--12 Radio unit (e--RDRX): functional unit

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4 SOFTWARE DESCRIPTION

4.1 BTS software presentation

BTS software is divided into downloadable files and an onboard PROM.

4.1.1 Downloadable files

The BSC downloads these files via the A--bis interface.

There are two sets of files: BCF and DRX. Each set is arranged in a file catalogue

that contain the list of files and the files themselves.

4.1.2 PROM

PROM

chips are read-only memory units used to store software.

They are all installed on all BTS equipment boards.

4.1.2.1 S12000 BTS CBCF Software

The software product associated with the boards and slaves of the CBCF Modules

are listed in Table 4--1.

Board Sofware product name Software product type

CBCF Module PE_CBCF_B

PE_CBCF_DLU0

Boot

DLU Code

CPCMI PE_CPCMI_E1

PE_CPCMI_T1

Load

RECAL PE_RECAL Load

Table 4--1 CBCF software product names

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4.1.2.2 S12000 BTS family DRX Software

As listed in Table 4--2, the software products vary depending on whether the BCF

or CBCF is used in the BTS. DRX O&M software is used with the BCF. DRX

COAM is used with the CBCF or BCF from V12 onward.

Board Sofware product name Software product type

DRX O&M/COAM PE_AMNU_COAM_L

PE_AMNU_RSL_L

PE_AMNU_B

PE_SPU2G_EGAL1_L

PE_SPU2G_EGAL2_L

PE_SPU2G_1620_L

PE_SPU2G_BIST

PE_SPU2G_BIST_1620

PE_TX_L_COAM

PE_BDT_L

PE_TOOLS

O&M AMNU LOAD

RSL AMNU LOAD

AMNU BOOT

SPU EGAL1

SPU EGAL2

SPU 1620

BIST SPU

BIST SPU 1620

BDT

PL TOOLS

DRX PE_AMNU_COAM_L

PE_AMNU_RSL_L_C

PE_AMNU_B

PE_SPU2G_16410_L

PE_TOOLS

O&M AMNU LOAD

RSL AMNU LOAD

AMNU BOOT

SPU 16410

PL TOOLS

Table 4--2 S12000 BTS family : DRX software product names

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4.2 BTS software functions

BTS software is distributed among three major units (see Figure 4--1):

The DRX unit is designed to transmit and receive (modulate and demodulate)

and manage TDMA frames on the radio channel.

The CBCF manages its slave units:

•

CPCMI, RECAL, or DRX, CC8

The TIL unit is used for in--factory testing of the BTS, and to configure, control,

and supervise the BTS on site.

The following terms are used in this chapter:

BIST: Basic hardware self--test programs of a BTS subsystem subassembly.

These tests validate a subassembly intrinsically, without disturbing the other

subassemblies. An example is the AMNU BIST, which tests the components

(such as memory) of the AMNU unit on the

DRX

logical board.

Self--tests: Global, functional test programs, which use several subassemblies in

order to validate an assembly (such as the DRX). These tests can be broken down

into tests of more or less elementary functions. This may require external

equipment (so the term may be misleading).

Downloading: A process which consists of installing, in the DRX (logical part),

software from an external entity (terminal, Ethernet network, BSC, etc.).

Loading: A process used to load, into the subassemblies of the DRX (logical

part), the software it requires for its nominal operation.

4.2.1 DRX software functions

The DRX is downloaded by the BSC, configured and supervised by the BSC and

the CMCF (CBCF) through a LAPD link and a serial link. It serves as a gateway

between the radio channel and the BSC. It handles both signaling and voice for all

the logical channels carried by a given TDMA frame.

The module has four functions:

The AMNU (LAPDm, L3 RSL, L3 O&M) is the

DRXs

management unit.

The SPU is a gateway between the radio network and the BSC.

TX and RX manage radio transmission and transmission.

The BDT manages the GSM TIME.

Software descrIption Nortel Networks Confidential

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TIL

KERNEL

ABIS

O&M

KERNEL

O&M

specific

CBCF

Group of slave

managers

DRX

CPCMI

OS specific

(BSP)

RECAL

Group of slave

equipment

Figure 4--1 Software functions (with CBCF)

Software descrIptionNortel Networks Confidential 4--5

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L3 O&M AMNU

This software unit centralizes the operating and maintenance functions:

initialitization and monitoring of BISTs

connection with Abis and BCF

downloading and software marking

configuration

defense and alarms

tool functions

transmission of GSM TIME to BDT, and of O&M to TX

L3 RSL

This software unit represents the Radio Resource (RR) and the radio measurements

function (L1M) in the BTS:

radio link layer management

dedicated channel management

common channel management

TRX management

error handling

measurement collecting

measurement pre--processing (for power control by the BTS, and for call

clearing and handover decision for the BSC)

LAPDm

This software unit provides the LAPDm radio level 2 protocol with the mobile.

SPU

This software unit enables the level 1 radio communication with the mobile to

transmit and receive:

gateway between radio and terrestrial network (Abis) for the traffic channel

multiplexing and demultiplexing of the logical channels on physical channels

This software unit provides the radioelectrical reception function.

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L3 TX

This software unit manages and monitors radio transmission. It is installed in each

DRX

board. It sets the transmitter operation mode, defines the FH bus input from

which the TX should read data, and defines the transmission power to be used. It

also controls the Power Amplifier (PA).

L1 BDT

This software unit extracts the GSM TIME carried on the PCMp (GSM TIME TS)

for the BDT unit.

LAPD

This software unit manages the LAPD link level 2 protocol on PCM between DRX,

e--DRX, DRX--ND3 and BSC.

4.2.1.1 Network ID

With the implementation of V15.0, the BTS detects the type of DRX and PA during

connection with respect to the BCF and the DRX. Note the following restrictions:

If a DRX is not yet connected to the BCF, its type is set to “DRX type” until it is

connected.

If a PA is not yet connected to the DRX, its type is set to “PA type” until it is

connected.

If a fault beginning has been sent on the DRX type (or PA type) of equipment,

because the real equipment type was unknown, the fault ending must be sent on a

DRX or PA type, even if the DRX or PA have connected themselves between the

fault begin and fault end.

4.2.1.2 Defense

The DRX board carries out no defense actions by itself.

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4.2.2 CBCF software functions

CBCF Software is based on a COAM software architecture, which is composed of

three main parts:

common software for various BTS products

•

OS Kernel

•

O&M Kernel

BTS--specific software dedicated to a BTS product

•

OS--specific

•

O&M--specific

slave managers

The COAM architecture is shown in Figure 4--2.

The CBCF software manages the following O&M functions:

PCM management

configuration and supervision management

software management

synchronization management

test management

duplex management

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Layer 2

Layer 3 access

Layer 2

Layer 3 access

Software

management Abis management

Equipment

manager

Connection

manager

Radio

resource

manager

Synchro

manager

Interlayer CBCF

Slave managers

DRX

manager

CPCMI

manager

RECAL

manager

O&M

kernel

CBCF

BSC

DRX

equipment

CPCMI

equipment

RECAL

equipment

Figure 4--2 COAM architecture on the CBCF

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4.2.2.1 PCM Management

This function selects one of the incoming PCMs for communication with the BSC.

It then routes PCM TSs to the appropriate equipment in the BTS as the BSC

requests. Other PCM TSs are routed toward another PCM to allow drop & insert

functionality.

This function also ensures LAPD concentration.

4.2.2.2 Configuration and supervision management

This function translates the OML A--bis model into a physical model to offer a

standardized configuration and supervision to the BSC. The CBCF acts as an A--bis

front end toward the BSC for configuration and supervision purposes. It is the only

link for configuration messages coming from the BSC. The CBCF uses the CBCF/

DRX protocol to drive any actions concerning the DRX.

4.2.2.3 Software management

The CBCF performs software management for the BTS and provides the only link

for downloading messages from the BSC. When a RECAL or CPCMI board is

downloaded, the CBCF/Slave protocol is used.

4.2.2.4 Synchronization management

The CBCF builds the GSM time and provides it to the DRX, e--DRX, or DRX--ND3

via a TS or a private PCM. External PCMs ensure long term stability.

4.2.2.5 Test Management

The CBCF coordinates all BTS tests. When an installation or maintenance action

affects a

DRX

,the

DRX

is driven by the CBCF using the CBCF/DRX Protocol.

4.2.2.6 Duplex Management

The COAM software manages a cold and hot duplex modes.

4.2.3 Maintenance

The three types of customers include:

EDGE customer: function is necessary, because EDGE equipment must be

differentiated from non--EDGE equipment. An e--DRX must be replaced by an

e--DRX. An HePA must be replaced by an HePA.

Customer who uses an HePA or an e--HePA mixed cell in concentric cell: an

HePA must be replaced by an HePA, and an e--PA must be replaced by an e--PA. A

CMCF phase 2 must be replaced by a CMCF phase 2.

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Other customer: an e--DRX or a DRX ND3 can replace a failing DRX, an e--PA

(or an HePA) can replace a PA, if the number of the (H)(e)PA in the BTS respects

the HePA supported configurations. A CMCF phase 1 can replace a CMCF phase

2 (and vice versa), if the CMCF software is compatible with CMCF phase 1. No

mixing between phase 1 and phase 2.

4.2.4 TIL software functions

TIL is an application running on a PC in the WINDOWS 95 and WINDOWS 2000

environment. The TIL application is connected to the CBCF through an ethernet

connection.

The TIL is designed to do the following:

validate the BTS in the factory

install the BTS site

perform diagnostics of hardware problems

check equipment substitution

check the equipment extension within a cabinet

Ethernet

This unit is installed in the PC. It provides the level 1 and 2 communication layer.

Level 1 is a hardware driver. The level 2 protocol is an LAPD UI frame. TCP--IP

Protocol is used.

L3 TIL

This software unit manages all the boards of the BTS by establishment of a network

with all the GSM entities of the BTS. It integrates the factory and installation test

environment.

The TIL takes the following testing into consideration:

the conformity of the cabinet configuration

the validity of the data links

the external BTS PCM

the connectors in the cabinet for cabinet extensions

Dimensioning rulesNortel Networks Confidential 5--1

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5 DIMENSIONING RULES

For information on dimensioning, refer to document GSM/GPRS/EDGE BSS

Engineering Rules (PE/DCL/DD/0138).

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Wireless Service Provider Solutions

S12000 BTS Reference Manual

NORTEL NETWORKS CONFIDENTIAL:

The information contained in this document is the property of Nortel

Networks. Except as specifically authorized in writing by Nortel

Networks, the holder of this document shall keep the information

contained herein confidential and shall protect same in whole or in part

from disclosure and dissemination to third parties and use for evaluation,

operation and maintenance purposes only.

You may not reproduce, represent, or download through any means, the

information contained herein in any way or in any form without prior

written consent of Nortel Networks.

The following are trademarks of Nortel Networks: *NORTEL

NETWORKS, the NORTEL NETWORKS corporate logo, the NORTEL

Globemark, UNIFIED NETWORKS, S2000, S4000, S8000.

GSM is a trademark of France Telecom.

All other brand and product names are trademarks or registered

trademarks of their respective holders.

Publication Reference

PE/DCL/DD/0142 411--9001--142

15.102/EN

May 2005

Originated in France

For more information, please contact:

For all countries, except USA:

Documentation Department

Parc d’activité de Magny--Chateaufort

CHATEAUFORT

78928 YVELINES CEDEX 9

FRANCE

Email : gsmntp@nortelnetworks.com

Fax : (33) (1) 39--44--50--29

In the USA:

2221 Lakeside Boulevard

Richardson TX 75082

USA

Tel: 1--800--4 NORTEL

1--800--466--7838 or (972) 684--5935

Internet Address:

http://

Avaya Canada S12000BTS Base Transceiver Station User Manual 411 9001 142 15102

Avaya Canada Corporation Base Transceiver Station 411 9001 142 15102

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