CBTS Hardware Manual

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ZXC10 CBTS I2CDMA2000

Compact Base Transceiver Station-I2

Hardware Manual

ZTE CORPORATION

ZTE Plaza, Keji Road South,Hi-Tech Industrial Park,Nanshan District, Shenzhen,P. R. China518057

Tel: (86) 755 26771900 800-9830-9830Fax: (86) 755 26772236URL:

0H

http://support.zte.com.cn

E-mail: [email protected]


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LEGAL INFORMATION

Copyright 2006 ZTE CORPORATION.

The contents of this document are protected by copyright laws and international treaties. Any reproduction ordistribution of this document or any portion of this document, in any form by any means, without the prior writtenconsent of ZTE CORPORATION is prohibited. Additionally, the contents of this document are protected bycontractual confidentiality obligations.

All company, brand and product names are trade or service marks, or registered trade or service marks, of ZTECORPORATION or of their respective owners.

This document is provided as is, and all express, implied, or statutory warranties, representations or conditionsare disclaimed, including without limitation any implied warranty of merchantability, fitness for a particular purpose,title or non-infringement. ZTE CORPORATION and its licensors shall not be liable for damages resulting from theuse of or reliance on the information contained herein.

ZTE CORPORATION or its licensors may have current or pending intellectual property rights or applicationscovering the subject matter of this document. Except as expressly provided in any written license between ZTECORPORATION and its licensee, the user of this document shall not acquire any license to the subject matter

herein.

The contents of this document and all policies of ZTE CORPORATION, including without limitation policies related tosupport or training are subject to change without notice.

Revision History

Date Revision No. Serial No. Reason for Revision

17/03/2007 R1.0 sjzl20061487 First edition

08/06/2007 R1.1 sjzl20061487 CBM Configuration


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ZTE CORPORATION

Values Your Comments & Suggestions!Your opinion is of great value and will help us improve the quality of our productdocumentation and offer better services to our customers.

Please fax to: (86) 755-26772236; or mail to Documentation R&D Department,ZTE CORPORATION, ZTE Plaza, A Wing, Keji Road South, Hi-Tech Industrial Park,Shenzhen, P. R. China 518057.

Thank you for your cooperation!

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ZXC10 CBTS I2 CDMA2000 Compact Base Transceiver Station-I2 Hardware Manual

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Contents

About this Manual............................................................. i

Purpose................................................................................ i

Intended Audience ................................................................. i

Prerequisite Skill and Knowledge.............................................. i

What is in This Manual........................................................... ii

Related Documentation.......................................................... ii

Conventions ......................................................................... ii

How to Get in Touch............................................................. iii

Chapter 1..........................................................................1

CBTS I2 Cabinet ...............................................................1

CBTS I2 Configuration Types ............................................2

Cabinet Features.............................................................2

Engineering Specifications ................................................3

Physical Dimensions ..............................................................3

Weight & Ground Bearing Capacity ..........................................4

Power Supply Requirements ...................................................4

Grounding Requirements........................................................ 4

Temperature and Humidity.....................................................5

Power Consumption ..............................................................5

Cabinet Structure ............................................................6

Outer Structure ....................................................................6

Inner Structure................................................................... 10

Backplane.......................................................................... 13

Cabinet Interfaces.........................................................14

CBTS I2 Plug-in-Box......................................................18

RFE/DPA Shelf .................................................................... 18

CBM/TRX Shelf ................................................................... 20

TRX/BDS Shelf ................................................................... 21

Fan................................................................................... 24

Power Supply ...............................................................25


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DC Busbar..........................................................................26

RPD ..................................................................................27

Signal Flow ..................................................................28

Forward Signal Flow ............................................................28

Reverse Signal Flow.............................................................30

Chapter 2........................................................................33

CBTS I2 Boards ..............................................................33

Boards List...................................................................34

CBM............................................................................ 35

CCM............................................................................ 45

DSM............................................................................50

SNM............................................................................ 57

CHM............................................................................61

CHM0 ................................................................................62

CHM1 ................................................................................67

CHM2 ................................................................................72

RIM............................................................................. 77

RIM1 .................................................................................78

RIM3 .................................................................................83

RMM ........................................................................... 88

RMM 5 ...............................................................................91

RMM6................................................................................94

RMM7.............................................................................. 100

BIM7......................................................................... 101

GCM.......................................................................... 101

SAM.......................................................................... 101

SAM4 .............................................................................. 101

SAM3 .............................................................................. 101

SAM5 .............................................................................. 101

TRX .......................................................................... 101

Crest factor_reduction TRX ................................................. 101

Digital Predistortion TRX..................................................... 101

DPA .......................................................................... 101

PIM........................................................................... 101

RFE........................................................................... 101

RFE_A ............................................................................. 101

RFE_B ............................................................................. 101


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Chapter 3......................................................................101

Cabinet External Cables & Components......................101

GPS Antenna Feeder System ........................................ 101

GPS Antenna.................................................................... 101

GPS Feeder...................................................................... 101

GPS Feeder Connector ....................................................... 101

Main Antenna Feeder System........................................ 101

Antenna .......................................................................... 101

Main Feeders.................................................................... 101

Main Feeder Connector ...................................................... 101

Jumpers .......................................................................... 101

Jumper Connectors ........................................................... 101

Lightning Arrester ............................................................. 101

Grounding Clip ................................................................. 101

Feeder Fixing Clip ............................................................. 101

Monitoring System ...................................................... 101

Temperature and Humidity Sensor ...................................... 101

Smoke Sensor .................................................................. 101

Door Sensor..................................................................... 101

Infrared Sensor ................................................................ 101

External Monitoring Cable .................................................. 101

Extended Monitoring Cable ................................................. 101

Grounding System ...................................................... 101

Grounding Copper Busbar .................................................. 101

Grounding Tandem Cable ................................................... 101

DC Power Cable .......................................................... 101

Fast Ethernet Cables.................................................... 101

BDS Interconnection Cable ........................................... 101

Trunk System............................................................. 101Trunk Cable Conversion ..................................................... 101

Trunk Cables.................................................................... 101

75 Coaxial E1 Cable ....................................................... 101

120 Twisted Pair E1 Cable............................................... 101

100 T1 Cable ................................................................. 101

Fiber Cables ............................................................... 101

Chapter 4......................................................................101

CBTS I2 Internal Cables ..............................................101


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Power Cables.............................................................. 101

Working Block Diagram...................................................... 101

TPB - RCB Interconnection Cable ......................................... 101

RCB - DC Busbar Interconnection Cable................................ 101

-48 VGND Input Interface - TPB Interconnection Cable ........... 101

DC Busbar - Backplane Interconnection Cable ....................... 101

RPF - DC Busbar Interconnection Cable ................................ 101

DC Busbar - Cabinet Grounding Interconnection Cable............ 101

RF Cables .................................................................. 101

DPA - RFE Interconnection Cables........................................ 101

CBM-BIM_7E Interconnection Cable ..................................... 101

GCM - Lightening Arrester Interconnection Cable ................... 101

Cabinet Interconnection Cable............................................. 101

Monitoring Cables ....................................................... 101

Monitoring Cable 1 ............................................................ 101

Monitoring Cable 2 ............................................................ 101

GPS Lightning Arrester................................................. 101

Appendix A...................................................................101

PWSB I2 Cabinet..........................................................101

Salient Features.......................................................... 101Power Supply Standards .............................................. 101

Dimensions ................................................................ 101

Structure ................................................................... 101

Backplane ........................................................................ 101

Top Interfaces .................................................................. 101

PMM................................................................................ 101

PRM ................................................................................ 101

PPD................................................................................. 101

Appendix B ...................................................................101

Abbreviations ...............................................................101

Figures..........................................................................101

Tables...........................................................................101

Index ............................................................................101


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Confidential and Proprietary Information of ZTE CORPORATION i

About this Manual

Purpose

ZXC10 CBTS I2 is a ZXC10 series product based on IP (internetprotocol) technology developed by ZTE Corporation. ZXC10CBTS I2 meets customer requirements for a system that

features high capacity with multiple services, transmissionmodes and applications.

ZXC10 CBTS I2 Hardware Manual covers the following topics:

Hardware System Architecture

Configurations

Block Diagram

Hardware Boards

Internal/External Interfaces

Cable Connections

Jumpers

For users ease, this manual abbreviates ZXC10 CBTS I2 as CBTS,ZXC10 BSS as BSS, and ZXC10 BSC as BSC.

Intended Audience

This document is intended for engineers and technicians whoperform operation activities on the ZXC10 CBTS.

Prerequisite Skill and Knowledge

To use this document effectively, users should have a generalunderstanding of wireless telecommunications technology.Familiarity with the following is helpful:

ZXC10 CBTS system and its various components

User interfaces on Compact Base Transceiver Station (CBTS)

Local operating procedures


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ZXC10 CBTS I2 Hardware Manual

ii Confidential and Proprietary Information of ZTE CORPORATION

What is in This Manual

This Manual contains the following chapters:

T ABL E 1 C HAPT ER S UM M ARY

Chapter Summary

Chapter 1

CBTS I2 Cabinet

Introduces the ZXC10 CBTS CabinetOverview and structure.

Chapter 2

CBTS I2 Boards

Introduces the ZXC10 CBTS Boardsoverview, principles and functions.

Chapter 3

Cabinet External Cables& Components

Introduces the ZXC10 CBTS Cabinet

external cables and different components.

Chapter 4

CBTS I2 Internal Cables

Introduces the ZXC10 CBTS internalcables.

Appendix A

PWSB I2 Cabinet

Introduces the ZXC10 PWSB I2 cabinet

Related Documentation

The following documentation is related to this manual:

ZXC10 CBTS I2 Compact Base Transceiver Station-I2General Description

ZXC10 CBTS I2 Compact Base Transceiver Station-I2Installation Manual

ZXC10 CBTS I2 Compact Base Transceiver Station-I2Maintenance Manual

Conventions

ZTE documents employ the following typographical conventions.

T ABL E 2 TYP O G RAPHI CAL C O NVENT I O NS

Typeface Meaning

Italics References to other Manuals and documents.

Quotes Links on screens.

Bold Menus, menu options, function names, inputfields, radio button names, check boxes, drop-down lists, dialog box names, window names.

TypographicalConventions


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About this Manual

Confidential and Proprietary Information of ZTE CORPORATION iii

Typeface Meaning

CAPS Keys on the keyboard and buttons on screensand company name.

Const ant wi dt h Text that you type, program code, files anddirectory names, and function names.

[ ] Optional parameters.

{ } Mandatory parameters.

| Select one of the parameters that are delimitedby it.

Note: Provides additional information about acertain topic.

Checkpoint: Indicates that a particular step needsto be checked before proceeding further.

Tip: Indicates a suggestion or hint to make thingseasier or more productive for the reader.

T ABL E 3 MO USE OPERAT I O N CO NVENT I O NS

Typeface Meaning

Click Refers to clicking the Main mouse button (usuallythe left mouse button) once.

Double-click Refers to quickly clicking the Main mouse button(usually the left mouse button) twice.

Right-click Refers to clicking the secondary mouse button(usually the right mouse button) once.

Drag Refers to pressing and holding a mouse button andmoving the mouse.

How to Get in Touch

The following sections provide information on how to obtain

support for the documentation and the software.

If you have problems, questions, comments, or suggestionsregarding your product, contact us by e-mail [email protected]. You can also call our customer supportcenter at (86) 755 26771900 and (86) 800-9830-9830.

ZTE welcomes your comments and suggestions on the qualityand usefulness of this document. For further questions,comments, or suggestions on the documentation, you cancontact us by e-mail at [email protected]; or you can fax yourcomments and suggestions to (86) 755 26772236. You can alsobrowse our website at http://support.zte.com.cn, which contains

Mouse

OperationConventions

CustomerSupport

DocumentationSupport


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iv Confidential and Proprietary Information of ZTE CORPORATION

various interesting subjects like documentation, knowledge base,forum and service request.


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vi Confidential and Proprietary Information of ZTE CORPORATION



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Confidential and Proprietary Information of ZTE CORPORATION 1

C h a p t e r

1

CBTS I2 Cabinet

The chapter covers the following topics:

CBTS I2 Types

Cabinet Features

Engineering Specifications

Cabinet Structure

Cabinet Interfaces

CBTS Plug-in-Box

Power Supply

Signal Flow


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2 Confidential and Proprietary Information of ZTE CORPORATION

CBTS I2 Configuration TypesCBTS I2 can be characterized in to two types based on the

configuration. Following are the CBTS I2 configuration types: CBTS I2 with CBM configuration

CBTS I2 with BDS subsystem configuration

Cabinet FeaturesThe entire CBTS I2 system solution is based upon IP platform.Its structural design features are CBTS cabinet stack-processingand flexible networking configuration. The cabinet structure has

the following characteristics: Compact BTS.

High equipment integration and large system capacity.

Leading technologies.

Far-sightedness (powerful upgrading compatibility).

Flexible application (provides networking structures asrequired by users).

The CBTS I2 is one of the indoor macro base transceiver stationmodels in the all IP BTS series. The model main characteristics

are high system integration and large system capacity.


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Chapter 1 CBTS I2 Cabinet


Engineering SpecificationsEngineering specifications include:

Physical dimensions

Power supply requirements

Grounding requirements

Humidity temperature

Power consumption

Note:All the engineering specifications are same of both typesof CBTS I2 except that power consumptions because in CBTS I2with CBM configuration all BDS boards are integrated on singleboard.

Physical Dimensions

Cabinet dimensions (Height (H) x Width (W) x Depth (D)):850 mm (33 7/16 in) x 600 mm (23 10/16 in) x 600 mm (2310/16 in)

Mounting base Dimensions: H x W x D = 54 mm (2 2/16 in) x600 mm (23 10/16 in) x 600 mm (23 10/16 in).

505HFigure 1 shows CBTS cabinet and base dimensions.

F I G URE 1 CABI NET D I M ENSI O NS


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506H

Figure 2 shows the cabinet base dimensions.

F I G URE 2 C ABI NET B ASE D I M ENSI O NS

Weight & Ground Bearing Capacity

Table 4 shows the Gross Equipment Weight and Ground BearingCapacity of the Equipment Room.

T ABL E 4 W EI G HT AND G RO UND BEARI NG C APACI T Y

WeightConfiguration

Kg Pounds

4 Carrier and 1 sector (4C3S) 126.5 278.88

4C3S 155.5 342.81

Power Supply Requirements

Table 5 shows the Normal working voltage of CBTS CMB.

T ABL E 5 N O RM AL W O RKI NG VO L T AG E

SN Nominal Value Allowed Fluctuation

1 -48 V DC -40 ~ -57 V DC2 220 V AC 150 ~ 300 V AC, 45 Hz ~ 65 Hz

3 110 V AC 85 ~ 135 V AC, 45 Hz ~ 65 Hz

Grounding Requirements

Joint grounding resistance 1and BTS grounding resistance 5 .


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Temperature and Humidity

Table 6 shows the BTS normal working environmentrequirements.

T ABL E 6 NO RM AL WO RKI NG ENVI RO NM ENT REQ UI REM ENT S

Equipm

entTemperature Humidity

WorkingTemperature

WorkingTemperatureRecommended

WorkingHumidity(%RH)

WorkingHumidityRecommended (%RH)

CBTS I2

-5 ~ 45

23 ~ 113 F

15 ~ 35

59 ~ 95 F

15 ~ 93 40 ~ 60

Power Consumption

Table 7 Shows the BTS power consumption during normalworking.

T ABL E 7 PO WER CO NSUM PT I O N DURI NG NO RM AL W O RKI NG

TypicalConfiguration

OutputPower

(W)

1xMaximu

m PowerConsumption(Full-Loading)

(W)

DO

Maximum PowerConsumption(Full -Loading)

(W)

1xTypical

PowerConsumption(Half -Loading)

(W)

DOTypical

PowerConsumption(Half-Loading)

(W)

1C3S 40 1210 1220 1090 1060

4C3S 40 1250 1320 1140 1150

5C3S 40 2360 2440 2130 2110

8C3S 40 2400 2530 2170 2210

1C3S 60 1720 1730 1490 1430

4C3S 60 1760 1820 1540 1530

5C3S 60 3370 3450 2930 2860

8C3S 60 3420 3550 2970 2960


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Note:

CBTS I2 with CBM module supports only 12CS configurationfor 1X services and 3CS configuration for Do services.

Because CCM, DSM, GCM, RIM, RMM and CHM boards arenow integrated on single CBM board that reduces the powerconsumption of 150W of CBTS I2 with CBM configuration.

Cabinet StructureThe CBTS structure can be characterized in to following types:

Outer Structure

Inner Structure

Backplane

Outer Structure

CBTS cabinet consists of following components:

Front door

Back door

Cabinet base

Converter panel

Top interfaces

Note:Both types of CBTS I2 have the same outer structure.


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Figure 3 shows the CBTS cabinet exterior view.

F I G URE 3 CABI NET E XT ERI O R V I EW

Front Door


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Figure 4 shows the cabinet back view.

F I G URE 4 C ABI NET B ACK V I E W

Figure 5 shows the cabinet base.

F I G URE 5 C ABI NET B ASE

Back Door

Cabinet Base


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518H

Figure 6 shows the installed converter panel.

F I G URE 6 CO NVERT ER P ANEL

1. M3 X 12 bolt 2. Converter

3. Cabling tray/pipe 4. M4 x 10 bolt

519HThe converter panel is only used for 75 ohm E1 cable. 520HFigure 7

shows converter panel.

F I G URE 7 CO NVERT ER P ANEL

There are sixteen different E1 indicators on right side and sixmonitoring and control switches on converter panel on left side.

Switch input 1(SW_IN1) and switch input 2 (SW_IN2) aretwo converter switches, which transfer switch values.

Control output (CTRL_OUT) transfers control output values.

ConverterPanel


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Smog monitor (SMOG_MON) connection transfers smogsensor values.

Humidity and temperature monitor (HUM_TEMP_MON)connection transfers humidity and temperature values.

Infrared monitor (INFRARED_MON) transfers infrared values.

The 100 T1 and 120 E1 cables can be connected directlywith the CBTS top interfaces.

Inner Structure

The inner structure of ZXC10 CBTS cabinet consists of followingcomponents:

RFE/DPA shelf TRX/BDS shelf

Fan shelves

Figure 8 shows the unpopulated cabinet front view withouthinged door and boards.

F I G URE 8 UNPO PUL AT ED C ABI NET FRO NT V I EW

Note:In case of CBTS I2 with CBM configuration type TRX/BDS

plug-in-box is named as TRX/CBM plug-in-box.

UnpopulatedCabinet


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502H

Figure 9 shows a fully configured CBTS I2 cabinet with CBMconfiguration.

F I G URE 9 FUL L Y CO NF I G URED CBTS I2 C ABI NET WI T H CBM

Fully ConfiguredCabinet


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Figure 10 shows a fully configured CBTS I2 cabinet with CBMconfiguration.

F I G URE 10 F UL L Y C O NF I G URED CBTS I2 C ABI NET WI T H BDS

C O NF I G URAT I O N

Note: For readers ease, above figure does not show someindicator and interfaces name, as they will be covered in detail inchapter 2.

A single fully Populated CBTS cabinet consists of the followingcomponents:

BDS subsystem

RFS subsystem


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Backplane

Backplane integrates the CBTS boards together and suppliespower to the related boards.

Figure 11 shows the backplane structure.

F I G URE 11 CBTS B ACKPL ANE

1. SMA Connectors 2. Power Interfaces3. Monitoring Interfaces 4. DC Busbar

SMA connectors connect CBTS with the extended cabinet. Powerinterfaces connects CBTS backplane with -48 VDC, -48 VGNDand GNDD interfaces located on the DC busbar. Monitoringinterfaces connect CBTS backplane with internal monitoringequipments.

Overview

Structure


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Cabinet Interfaces510HFigure 12 shows the top interfaces physical interfaces.

F I G URE 12 CBTS TO P

1. Extended Monitoring Interface 2. Extended BDS Interface

3. Room Monitoring Interface 4. FE Interfaces

5. E1/T1 Interfaces 6. Power and Grounding Interfaces

7. Feeder Outlets

Extended Monitoring Interface

DB44 type connector connects CBTS with the extendedcabinet monitoring units.


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511H

Figure 13 shows the extended monitoring interface layout.

F I G URE 13 EXT ENDED MO NI T O RI NG I NT ERF ACE

Extended BDS Interface

DD78 type connector connects CBTS with the extended BDScabinet.512H

Figure 14 shows the extended BDS interface.

F I G URE 14 EXT ENDED BDS I NT ERF ACE

Note: ZXC10 CBTS CMB doesnt support any extended BDS.This interface can be used for future expansion.

Room Monitoring Interface

DB44 type connector connects CBTS with external roommonitoring units.

513HFigure 15 shows the room monitoring interface layout.

F I G URE 15 RO O M MO NI T O RI NG I NT ERF ACE

FE Interfaces

FE interfaces connect CBTS with BSC, Extended BDS, andmedia and signaling testing equipment. OWT is a RJ11interface that connects CBTS with the order wire telephone.If using ZTE PWSB cabinet, use PWSB interface to connectCBTS with PWSB cabinet. Otherwise use EXT_MON interface.


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RMM board software can be updated using R_TEST interface.CCM board software can be updated using S_TEST interface.

514HFigure 16 shows the FE interfaces layout.

F I G URE 16 FE INT ERF ACES

Note: CBTS I2 with CBM configuration supports only BSC_FE,T_TEST, O_PH, PWSB, EXT_COM and S_FE1 interfaces. Otherinterfaces are not used by CBTS and are reserved for futureupgradation.

E1/T1 Interfaces

Two DB44 type connectors are located on CBTS top thatconnects either with BSC or extended BTS.

515HFigure 17 shows the CBTS E1/T1 Interfaces layout.

F I G URE 17 E1 /T1 INT ERF ACES

Note:CBTS CBM supports eight E1/T1 interfaces.


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Power and Grounding Interfaces

PE, -48 VGND, and -48 V connect the input power andgrounding sources.

516H

Figure 18 shows the power interfaces.

F I G URE 18 PO WER AND GRO UNDI NG I NT ERF ACE L AYO UT

PE, -48 VGND, and -48 V connect the input power andgrounding sources.

Feeder Outlets

Main feeder from the antenna passes through these outletsand connects with RFE boards.

517HFigure 19 shows the feeder outlets layout.

F I G URE 19 FEEDER OUT L ET


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CBTS I2 Plug-in-BoxThis section describes the following components:

RFE/DPA Shelf

CBM/TRX Shelf (for CBTS I2 with CBM configuration)

BDS/TRX Shelf

Fan Shelf

Note: RFE/DPA shelf is same for both types of CBTS I2 butBDS/TRX shelf is used in CBTS I2 with BDS subsystemconfiguration and CBM/TRX shelf is used in CBTS I2 with CBMconfiguration. Working principle is different of both plug-in-boxes.

RFE/DPA Shelf

RFE/DPA shelf integrates RFE and DPA boards through thebackplane.

Figure 20 shows the RFE/DPA shelf inner view with fans installedbelow in the fan shelf.

F I G URE 20 RFE/DPA PL UG - I N BO X ENL ARG ED V I EW

Radio Frequency Subsystem (RFS) implements forward/reverselink processing, which converts forward baseband signals intoamplified RF signals, and reverse RF signals to baseband signals.

RFS subsystem consists of following board types:

Transmitter and Receiver (TRX)

RF Management Module (RMM)

Digital Pre-distortion Power Amplifier (DPA)

Overview

Structure &Configuration

Description


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PA Interface Module (PIM)

Radio Frequency End (RFE)

Note:In case of CBTS I2 with CBM configuration RMM board is

integrated on CBM module but in case if CBTS I2 with BDSsubsystem configuration RMM individual board of RFS subsystem.

Figure 21 shows the RFS subsystem block diagram of CBTS I2with BDS subsystem configuration.

F I G URE 21 RFS SUBSYST EM BL O CK D I AG RAM

RFE

TRX

BDS

RMM

RFE RFE

TRX TRX

DPA DPA DPA

Note: Above figure does not show the PIM board. PIM boardfunctions as a monitoring unit, which collects the RFE and DPArunning status information.

RFS subsystem performs the following functions:

RFS Forward link

Receives signals from the RIM board, performs D/Aconversion, filtering, median-frequency I/Q modulation, bandpass filtering, transmitting link gain control, signalamplification, and up-conversion on forward data.

RFS Reverse link

Receives signals from the RFE, performs down-conversion,signal amplification, band pass filtering, AGC, and median-frequency I/Q demodulation on reverse data.

Working BlockDiagram

Functions


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CBM/TRX Shelf

CBM/TRX shelf integrates TRX and CBM subsystem boardsthrough the backplane.

Figure 22 shows the CBM/TRX shelf inner view with fansinstalled in the fan shelf below.

F I G URE 22 CBM/TRX S HEL F INNER ST RUCT URE

Note: In CBM/TRX shelf, slot number six is fixed for CBMmodule.

Overview



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Figure 23 shows the RFS subsystem block diagram with CBMconfiguration.

F I G URE 23 RFS SUBSYST EM BL O CK D I AG RAM

TRX/BDS Shelf

TRX/BDS shelf integrates TRX and BDS subsystem boardsthrough the backplane. 501H

Figure 24 shows the TRX/BDS shelf inner view with fans installedbelow in the fan shelf.

F I G URE 24 TRX/BDS SHEL F I NNER ST RUCT URE




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BDS subsystem serves as the CBTS communication controlcenter. In addition, it implements baseband signal processingsuch as baseband signals modulation and demodulation, linearsummation, Abis interface functions, and cell sharing.

BDS subsystem contains the following boards:

CBM

Baseband Interface Module (BIM)

Site Alarm Module (SAM)

Figure 25 shows the CBM/TRX working block diagram.

F I G URE 25 CBM /TRX W O RKI NG B L O CK D I AG RAM

Description



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Figure 26 shows the BDS/TRX working block diagram.

F I G URE 26 - BDS SY ST EM BL O CK D I AG RAM

Note: Above figure does not show the BIM board. BIM boardfunctions as an interface unit, which either connects BDS withBSC or extended BTS.

Following are the functions of BDS subsystem:

BDS Forward Signal Processing

BSC transmits voice and data IP packets to the CBTSthrough Abis. DSM board performs Abis protocol termination.SNM board is an alternate way to receive voice and datapackets from BSC. SNM board converts Abis low-speed dataand SDH STM-1 frames to long-distance Abis data and sendsit to the DSM board. DSM board transmits Abis data to theCCM board for switching towards the relevant CHM board ofMain BDS subsystem or secondary BDS subsystem for CDMA

baseband forward modulation. RIM board multiplexes theforward data and transmits it to the RFS system. GCM boardsupplies reliable clock sources for CBTS boards.

BDS Reverse Signal Processing

RFS system sends reverse signals to the RIM board forbaseband demodulation. RIM board demultiplexes reversesignals and transmits these signals to the CHM board. CHMboard converts the reverse voice and packet data into frames,and transmits data as IP packets to the CCM board. CCMboard switches IP packets and then routes them to the DSMboard for Abis protocol processing. Finally, DSM board

Functions


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transmits data to the BSC either directly using the Abisinterface or through the SNM board.

FanFan boxes are installed at the bottom and in the middle ofcabinet. Bottom fan box has three fans because BDS producesmore heat. Middle fan box has two fans because RFS cabinetproduces less heat. These fan boxes perform air ventilation andmaintain the cabinet temperature.

Figure 27 shows the structure of middle fan box.

F I G URE 27 M I DDL E F AN BO X S T RUCT URE

Overview


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Figure 28 shows the structure of bottom fan box.

F I G URE 28 BO T T O M F AN B O X ST RUCT URE

Note:In case of CBTS I2 with CBM configuration there are twofan boxes in middle fan shelf and one fan box in bottom fan shelf.

Power SupplyCBTS cabinet can support 220 VAC or 24/-48 VDC power supplyinput.

If power supply is AC, then an additional 220 VAC to -48VDCconverter cabinet is required. ZTE provides 220 VAC to -48VDC converter cabinet (ZXC10 PWSB I2 cabinet).

For additional information about ZXC10 PWSB I2 refer toAppendix A.

If power supply is 24 VDC, then an additional 24 VDC to -48VDC converter cabinet is required. ZTE provides 24 VDC to-48VDC converter cabinet (ZXC10 PWSC I2 cabinet).

For additional information about ZXC10 PWSC I2 refer toAppendix B.

If power supply is -48 VDC, connect directly to the powerinterfaces located at the CBTS cabinet top.

PowerRequirements


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Provide CBTS with uninterrupted power supply (diesel enginegenerator set and storage battery), so that it can work normallyin case of main power supply failure.

DC Busbar

A DC busbar is located at the rear of CBTS cabinet. DC busbardistributes -48 V DC power supply and GND to the entire CBTScomponents.

508HFigure 29 shows the DC busbar location and enlarged view.

F I G URE 29 DC BUSBAR L O CAT I O N AND ENL ARG ED V I EW


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RPD

RFS Power Distribute (RPD) consists of following parts:

RFS Power Filter (RPF)

Thunder Protective Board (TPB)

RFS Circuit Breaker (RCB)

622HFigure 30 shows the RPD block Diagram.

F I G URE 30 RP D B L O CK D I AG RAM

Different RPD units perform the following functions:

DC input: Performs DC power input, switch control, andshort-circuit protection.

Power filter: Filters power interference.

Thunder protection: Absorb lightning strokes and surgesfrom the DC side.

Lightening protection unit alarm monitoring: Providelightening protection unit working status and alarm indication.

Input voltage: -48 VDC

Current: 100 A

RPF Insertion loss 25 dB

Overview

Working Block

Diagram

Functions

TechnicalIndices


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Signal FlowCBTS CBM can provide a 12CS configuration for 1X and 3CS

configuration for DO services.

Forward Signal Flow

521H

Figure 31 shows the forward signal flow with CBM configuration.

F I G URE 31 F O RWARD D I RECT I O N S I G NAL FL O W WI T H CBM CO NF I G URAT I O N


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Figure 32 shows the forward direction signal flow.

F I G URE 32 F O RWARD D I RECT I O N S I G NAL FL O W WI T H BDS CO NF I G URAT I O N


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Reverse Signal Flow

Figure 33 shows the reverse signal flow.

F I G URE 33 RE V E R S E S I G NAL FL O W WI T H CBM CO NF I G URAT I O N


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Figure 34 shows the reverse signal flow of CBTS I2 with BDSsubsystem configuration.

F I G URE 34 RE V E R S E S I G NAL FL O W WI T H BDS CO NF I G URAT I O N

RFE RFE RFE

TRX TRX TRX

RMM

RIM

CHM 1~4

CCM 1~2

SNM DSM

Sector

RX Antenna

Sector

RX Antenna

Sector

RX Antenna

Note:In above figures, CHM 1~4 means 4 CHM boards, CCM 1~2 means 2 CCM boards. CCM boards operate in master/slavemode.


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C h a p t e r

2

CBTS I2 Boards

This chapter describes types, Working Block Diagram and

functions, panel structure, layout, jumpers, and externalinterfaces of the following CBTS boards:

CBM BIM7

CCM GCM

DSM SAM

SNM TRX

CHM DPA

RIM PIM

RMM RFE

OIB


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Caution: Since CBTS board have many integrated circuits.Strictly follow the operation procedures, to avoid damages tocircuit board resulting from the static electricity.

Boards List523HTable 8 illustrates different types of CBTS boards list and theircorresponding shelf.

T ABL E 8 CBTS B O ARDS L I ST

BoardName

Full NameInstallation

location

CBM Compact BDS Module CBM/TRXCCM0 Communication Control Module 0 BDS/TRX

CCM6 Communication Control Module 6 BDS/TRX

GCM3 GPS Control Module 3 BDS/TRX

GCM4 GPS Control Module 4 BDS/TRX

SAM3 Site Alarm Module3 BDS/TRX



CHM0 Channel Handling Module 0 BDS/TRX



DSM Data Service Module BDS/TRX

SNM SDH Network Module BDS/TRX

RIM1 Radio Frequency InterfaceModule1

BDS/TRX

RIM3 Radio Frequency InterfaceModule2

BDS/TRX

BIM7_C BDS Interface Module7 C RFE/DPA

BIM7_D BDS Interface Module7 D RFE/DPA

DPA Digital Power Amplifier RFE/DPA

RFE_A Radio Front End A RFE/DPA

RFE_B Radio Front End B RFE/DPA

DigitalPredistortionTRX

Digital Predistortion Transceivermodule

BDS/TRX

Crestfactor_reduction TRX

Crest factor_reductionTransceiver module

BDS/TRX

PIM Power Amplifier Interface Module RFE/DPA


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Chapter 2 CBTS I2 Boards


CBMThe Compact Baseband Module (CBM) integrates all modules of

earlier baseband subsystem and it also combines some modulefunctions of RFS subsystem. Primarily the CBM integrates thefunctions of CHM, CCM, DSM, GCM, RIM, and RMM.

Figure 35 shows the working block diagram of CBM.

F I G URE 35 W O RKI NG BL O CK D I AG RAM O F CBM

Following are the functions of different units of CBM module:

CPU

CPU handles signals in the board.

GPS Unit

This unit mainly performs following functions:

It receives GPS satellite system signals, extracts andgenerates PP1S signals and navigation messages.

In addition it produces PP2S, 16CHIP and 30 MHz signalsand relevant Time of Date (TOD) messages using 1PPSsignals as the phase locking reference.

It performs system clock distribution.

ABIS Interface Unit


Eight E1/T1 interfaces processing;

FE interface processing;

CUDP/MP/HDLC protocol processing.

Description

Working Block

Diagram

Functions


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Note: E1/T1 interface matching, mode selection and lightningprotection processing is carried out on BIM.

Baseband Processing Unit


6700 baseband processing

6800 baseband processing

Baseband data format conversion

Note:

Module mother board has only one set of CSM6700 chipgroup.

Mother board has a connecting slot for baseband sub-card,where CSM6700 sub-card or CSM6800 sub-card can beplugged in.

Driving processing CPU-BMP needed by CSM6800 will beintegrated onto sub-card.

CSM6700 sub-card contains processor.

Supporting 12-sector sharing and providing 12-sectoraddition.

Optical Interface Board (OIB) Unit

This function unit mainly performs partial RIM functions,

which include: Forward: Demultiplexes baseband data by the ratio of

1:2 and sends one route directly to RFS unit, andmultiplexes the other route by the ratio of 3:1 togenerate HDLC frame and connects with remote RMMthrough OIB. While redefining baseband and datainterfaces of the functional units, baseband datademultiplexing will be unnecessary.

Reverse: Multiplexes reverse data from the RFS unit bythe ratio of 2:1, transmits it to baseband processing unit;deframes remote data, demultiplexes it at the ratio of 1:3

and then sends it to baseband processing unit. Supports three baseband fiber remote interfaces.

Supports CPRI interface.

RF Control Unit

This unit mainly performs management functions of local RFSunit, which includes:

Local RFS centralized control, including a TRX module, aPA module and a RFE module.

Forward and reverse baseband data processing.

Processing and distributing system clock and RF clock.


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Note:CBM module is used in CBTS I2 with CBM configuration tominimize the cost on customer demand. The CBM modulereplaces all the BDS boards and performs the equal functionsbecause BDS boards are integrated on CBM as subunits.

Figure 36 shows the CBM panel indicators.

F I G URE 36 CBM P ANEL I NDI CAT O RS

CBM FrontPanel


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Table 9 describes the functions of the CBM module panelindicators.

T ABL E 9 CBM PANEL INDI CAT O R F UNCT I O N DESCRI PT I O N

Indicator

ColorIndicatorMode

Description

Solid ON The program is beginning to runand begins to get logical address

Solid Off The boot procedure begins to loadthe version program in the flash.If the indicator flashes 3 times andthen turns off, it means there isno version program in the unit.For being OFF, there are tworeasons: no power supply or unit

not functioning properly.Flashing veryFast:

(ON for 334ms, then turnsOFF for 334ms, andcontinues insamemanner).

Board is in booting process.

Flashing Slow:

(ON for 1.5 s,then turnsOFF for 1.5 s,and continuesin samemanner).

The basic process is turning ON.

NormalFlashing:

(ON for 0.3 s,then turnsOFF for 0.3 s,

and continuesin samemanner).

Board is working normally.

RUN Green

Flashing Fast:


HDLC connection between RMMBoard and BDS disconnected.

PanelIndicators


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Indicator

ColorIndicatorMode

Description

Solid ON Level 1 failure:

RMM board clock or fiber linkalarm

Solid OFF Working normally

Flashing Slow0.5Hz

Level 2 failure

NormalFlashing: 2Hz

Level 3 failure

ALM(Alert

Indicator)

Red

Flashing: 8Hz


Board not in properly inserted inbackplane

Solid ON Fiber link is lockedFLS(FiberLinkState)

Green

Solid OFF Fiber link is not locked

Solid ON NormalBLS(Baseband LinkState) -indicate

s linkstate ofbaseband(reverse)transferred byTRXunit

Green

Solid OFF Abnormal

Solid ON NormalTYPE Green

Solid OFF Abnormal

Solid on:

Normalantennafeeder

ANT Green GPS antennafeeder statusindicator

Solid off:

Abnormalinitialization ofantennafeeder andsatellite

Solid on


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Indicator

ColorIndicatorMode

Description

Flashing Slow:

Break inantennafeeder

Flashing veryFast:

Normalantennawithoutsatellite signalreception

Flashing verySlow:

(ON for 2.5 s,then turn OFFfor 2.5second, andcontinues in asimilarmanner):

Antenna shortcircuit

Solid off:

Abnormalsystem clock

Normally on:means systemclock isnormal

Normally off:means that16Chip or 30MPhase-LockedLoop lose lock

Extremelyslow flashing:PP2S outputabnormality

Fast flashing:16Chip outputabnormality

CS Green Circuit clockindication

Extremely fastflashing: 30Moutputabnormality

Solid on


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Indicator

ColorIndicatorMode

Description

FE Green Linkconnection

statusindication forABIS port IPAccess toEthernet

ON means

link data

indication

OFF means

abnormalityor net cable isnot plugged in

Solid on

RSTC Green SMB joint Outputtingreferenceclock signalsof 10MHz

Solid on

1stsecond(on off

off offoff offoff offoff off)

Flashing: DT0Normal,

Notflashing: DT0 isnotnormal

2ndsecond(off offoff offoff offoff offoff off)

Interval

3rd

(onoff onoff offoff offoff offoff)

Flashing: DT1Normal,Notflashing: DT1 isnotnormal

4th(offoff offoff offoff offoff off

off)

Interval

E0S Green (E1 LINKGROUP0STATE)

Team 0 E1LinkL0L3

operationalstatusindication

FlashingNormal:0.125HZ,

50%

8S per periodis normal

5th(offoff onoff onoff offoff offoff)



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Indicator

ColorIndicatorMode

Description

6thsecond

(off offoff offoff offoff offoff off)

Interval

5th(offoff onoff onoff onoff offoff)


8thsecond(off offoff offoff offoff offoff off)

Interval

1stsecond(on offoff offoff off

off offoff off)

Flashing: DT4Normal, Notflashing

: DT4is notnormal

2ndsecond(off offoff offoff offoff offoff off)

Interval

3rd (onoff onoff offoff offoff offoff)

Flashing: DT5Normal, Notflashing: DT5is notnormal

E1S Green (E1 LINKGROUP1STATE)Operationalstatus

indication of1st E1 Link(L4-L7)

FlashingNormal:0.125HZ,50%

8S per period

is normal

4th (offoff offoff offoff offoff offoff)

Interval


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Indicator

ColorIndicatorMode

Description

5th (offoff on

off onoff offoff offoff)

Flashing: DT6

Normal, Notflashing: DT6is notnormal

6thsecond(off offoff offoff offoff offoff off)

Interval

5th (offoff onoff onoff onoff offoff)

Flashing: DT7Normal, Notflashing: DT7is notnormal

8thsecond(off offoff off

off offoff offoff off)

Interval

Table 10 illustrates the CBM panel buttons.

T ABL E 10 CBM BO ARD P ANEL B UT T O NS

Button Name Status Meaning

RST CBM Reset (GPSmodule not included)

The button resets all boardmodules except GPS module.

RSTC GPS Module Reset The button resets only GPSmodule.

CBM PanelButtons


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Table 11 describes the connection points of front panel externalinterfaces.

T ABL E 11 FRO NT PANEL INT ERF ACE DESCRI PT I O N

Interface Name Description

ANT Use ANT interface to connect with the GPSantenna.

10M Use 10 M interface to test the 10 MHz clockoutput.

PP2S Use PP2S interface to test the PP2S clockoutput.

MON Use MON DB9 bus to send control signal toGCM board.

Table 12 describes the fiber interfaces on front panel.

T ABL E 12 F I BER I NT ERF ACE

Interface Name Meaning

R0/T0 1st route fiber interface transceiver

R1/T1 2nd route fiber interface transceiver

R2/T2 3rd route fiber interface transceiver

Caution: The -48 V power supply input voltage exceeds safety

limits for human contact. Ensure adequate safety measures.Keep safe distance from power supply parts to avoid any electricshock risk.

Front PanelExternal

Interfaces


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CCMCCM board performs signaling processing, resource management,

and operation & maintenance of the CBTS. It is responsible forrouting the media and signaling within the CBTS. CCM boardworks in 1 + 1 active/standby mode.

524H

Table 13 illustrates the CCM types.

T ABL E 13 CCM TY PE S

Name FunctionInstallation

Location

CCM6 CCM6 board supports up to 12 D0

carrier sector configuration, or

24 1X carrier sectorconfiguration.

CCM6 board supports singlecabinet configuration.

CCM6 board supports RRFS.

CCM6 only connects extendedRFS subsystem.

Main cabinet

CCM0 Use CCM0 board only when

extended cabinet contains BDSsubsystem.

CCM0 board supports singlecabinet configuration.

Use CCM0 always in conjunctionwith the CCM6 board.

Secondary cabinet

Description

Types


60/254



The basic working block diagram and functions of all CCM typesare the same.

525HFigure 37 shows the CCM board block diagram.

F I G URE 37 CCM BO ARD BL O CK D I AG RAM

Following are the functions of different units of CCM board:

CPU

CPU handles signals in the board.

Media stream IP communication unit

Media stream unit enables communication among multiple

BDS subsystem boards, and routes voice and packet servicesbetween BDS and BSC.

TOD reception and broadcast

CCM board communicates and controls the GCM board, andreceives TOD messages through UART interface.

Control stream IP communication unit

Control stream unit implements IP signaling betweenmultiple CBTS system board, and between CBTS and the BSC.

RFS communication Signaling unit

RFS signaling unit connects RIM board through HDLC channelwith CCM board.

RIM board Communication unit

Through RIM board unit, the CCM board communicates withRIM board and performs configuration, operation,maintenance and management of the RIM board.

Direct status monitoring and control unit

Through direct status monitoring and control unit, CCM boardimplements direct status monitoring and control of all BDSsubsystem boards. The monitoring and control parametersincludes in-position indication, running indication, errorindication, hard reset, power off, and download control.


Functions


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Figure 37 illustrates the panel of CCM.

F I G URE 38 CCM B O ARD PANEL

Note:ALL CCM types front panel is marked as CCM

Panel andIndicators


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527H

Table 14 describes the CCM board panel indicators.

T ABL E 14 CCM BO ARD P ANEL I NDI CAT O RS

IndicatorName Color Meaning Description NormalStatus

RUN Green RUN indicator Solid on: Indicatesversion reading andobtaining networkaddress.

Solid off: Indicatespower-off or non-functional CPU

Flashing extremelyslow (0.2 Hz, 50%):Indicates BOOTrequest of version

download

Slow Flashing (1/3Hz, 50%): Indicatesbasic power-onprocess

Normal flashing (5/3Hz, 50%): Indicatescompleted Power-onand normal workingstatus

Fast flashing (50/7Hz, 50%): Indicates

externaldisconnection.

Normalflashing

(5/3Hz,50%)

ALM Red Alarmindicator

Solid on: Indicatesboard alarm

Solid off: Indicatesnormal boardoperation

Solidoff

M/S Green Active/standby stateindicator

Solid on: Indicatesactive board status

Solid off: Indicatesstandby board status

Solid onor off

HES Green Shared HUBEthernetrunningindicator

Solid on: Indicatesshared HUB Ethernetoperations

Solid off: Indicatesnormal shared HUBEthernet operations

Solid on

SES Green SwitchedEthernetindicator

Solid on: Indicatesnormal switchedEthernet operations

Solid off: Indicatesabnormal switchedEthernet operations

Solid on


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528H

Table 15 illustrates the CCM panel buttons.

T ABL E 15 CCM BO ARD P ANEL B UT T O NS

Name Description MeaningM/S Active/standby

switchoverbutton

Pressing the M/S button on the activeboard changes its mode from active tostandby if the standby board is normal.Improper standby board insertion or faultyboard leads to non-functional button.

M/S button on standby board does notperform any function.

RST Reset button Pressing the RST button resets the boardconfiguration.

CCM board complies with the following standards:

Ethernet complies with IEEE 802.3 standard

MLVDS interface complies with TIA/EIA-899

EMC

Electrostatic protection: -6 ~ +6 KV (contact), 10 ~ +10KV (no contact)

Caution:

Radiators are CCM board component. Long working hours ofCCM board results in heating up of radiators. Avoid touching

radiators or power supply parts.

The -48 V power supply input voltage exceeds safety limitsfor human contact. Ensure adequate safety measures. Keepsafe distance from power supply parts to avoid any electricshock risk.

TechnicalIndices


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DSMDSM board performs relay, data transfer and Abis interface

signal processing.DSM board supports following E1/T1 configuration:

1. 4 E1/T1 (One CIB0 sub unit is installed on the DSM board).

2. 8 E1/T1 (One CIB1 sub unit is installed on the DSM board).

3. 12 E1/T1 (One CIB0 and one CIB1 sub units are installed onthe DSM board).

4. 16 E1/T1 (two CIB0 sub units are installed on the DSMboard).

Use these configurations either to connect upstream BSC ordownstream BTS. In addition, DSM board connects othertransmission network, such as SDH optical transmissionnetworks through the HW interface.

529HFigure 39 shows the DSM board block diagram.

F I G URE 39 DSM BO ARD B L O CK D I AG RAM

Description



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Different DSM board units perform the following functions:

CPU

CPU uses a firmware to control the board components.

Abis interface protocol processing unit

FPGA constitutes the Abis interface protocol-processing unit.

IP communication interface unit

DSM board has three IP communication ports.

Control stream port connects DSM board with CCM boardcontrol stream.

Media stream port connects DSM board with CCM boardmedia stream.

Third communication port connects DSM board with BSC.

Standard/extended E1/T1 interface unit

Standard/extended E1/T1 interface unit supports E1 (75ohm), E1 (120 ohm), and long and short hauls T1.

HW interface unit

HW interface unit is used only when DSM board is directlyconnects SNM board. HW interface unit supports Highwaydata. When the HW interface is used, E1 transmission in thesame direction is unnecessary.

Orderwire interface unit

Orderwire interface unit provides interfaces for analogtelephone orderwire processing.

Switching unit

Switching unit provides functions as time slotted data cross-connection, order wire routing, and switching.

Functions


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530H

Figure 40 shows the DSM board panel.

F I G URE 40 DSM BO ARD PANEL

Panel andIndicators


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531HTable 16 illustrates the DSM board panel indicators.

T ABL E 16 DSM BO ARD P ANEL I NDI CAT O RS

IndicatorName

Color Meaning Description NormalStatus

RUN Green RUNindicator

Solid off: Power offor non-functionalCPU

Solid on: Power on

Flashing fast (20Hz): Version readingFlashing slowly (2Hz): Normaloperations

Flashingslowly

ALM Red Alarm

indicator

Solid on: Board

alarm indicatorSolid off: Normalboard operations

Solid off

M/S Green - - Solid on

E0S Green Group 0E1Indicator

RUN indicator(green) of uplinkDTs 0 ~ 3:

It takes eightseconds to completerunning statusindication of all four

DTs at once at aflashing frequencyof 0.125 Hz.

Normal DT0: flashesonce at the start ofthe 1st second, andstays off until theend of the 2ndsecond.

Normal DT1: Flashestwice at the start ofthe 3rd second andstays off until the

end of the 4

th

second.

Normal DT2: Flashesthree times at thestart of the 5thsecond, and staysoff until the end ofthe 6thsecond.

Normal DT3: Flashesfour times at thestart of the 7thsecond and stays offuntil the end of the

8

th

second,

FlashingDTs 0 ~ 3


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IndicatorName

Color Meaning DescriptionNormalStatus

indicating normalDT3.

If all DTs stay off, allfour E1 links areabnormal.

E1S Green Group 1E1indicator

RUN indicator(green) of the uplinkDTs 4 ~ 7:

It takes eightseconds to completerunning statusindication of all fourDTs at once at aflashing frequencyof 0.125 Hz.


Normal DT1: Flashestwice at the start ofthe 3rd second andstays off until theend of the 4thsecond.

Normal DT2: Flashesthree times at thestart of the 5thsecond, and staysoff until the end ofthe 6thsecond.

Normal DT3: Flashesfour times at thestart of the 7thsecond and stays offuntil the end of the8th second,indicating normalDT3.


Flashing

DTs 4 ~ 7


Downlink DTs 0 ~ 3RUN indicator(green):

It takes eightseconds to completethe running statusindication of all fourDTs at once at aflashing frequency

of 0.125 Hz.

Flashing

DTs 0 ~ 3


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IndicatorName


Normal DT0: flashesonce at the start of

the 1st

second, andstays off until theend of the 2ndsecond.


Normal DT2: Flashesthree times at thestart of the 5th

second, and staysoff until the end ofthe 6thsecond.

Normal DT3: Flashesfour times at thestart of the 7thsecond and stays offuntil the end of the8th second,indicating normalDT3.

If all DTs stay off, allfour E1 links are

abnormal.


RUN indicator(green) of thedownlink DTs 4 ~ 7:

It takes eightseconds for it tocomplete runningstatus indication ofall four DTs at onceat a flashingfrequency of 0.125Hz.



Normal DT2: Flashesthree times at thestart of the 5th

Flashing

DTs 4 ~ 7


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IndicatorName


second, and staysoff until the end of

the 6th

second.Normal DT3: Flashesfour times at thestart of the 7thsecond and stays offuntil the end of the8th second,indicating normalDT3.


HWS Green HW linkRUNstatusindication

Solid on: Normal

Solid off: Abnormalor no HW signal

Solid on

532HTable 17 illustrates the DSM board buttons.

T ABL E 17 DSM B O ARD PANEL BUT T O NS

Name Description Meaning

M/S Active/standbyswitchover button

M/S button on DSM board does notperform any function.

RST Reset button Pressing the RST button resets theboard configuration.

Caution: The -48 V power supply input voltage exceeds safetylimits for human contact. Ensure adequate safety measures.Keep safe distance from power supply parts to avoid any electricshock risk.


71/254



SNMSNM board enables low speed Abis interface links overlaid on

155 M links to provide long-distance Abis data transmission. Itcommunicates with DSM through the HW interface for datatransfer. The SNM board also supports SONET. The SNM boardsupports two pairs of fiber interface.

533HFigure 41 shows the SNM board block diagram.

F I G URE 41 SNM BO ARD B L O CK D I AG RAM

Different SNM board units perform the following functions:

CPU

CPU performs power-on self-test, initialization, configuration,performance alarm detection, and reporting board status. Inaddition, it communicates with the NMS terminal to receiveNMS commands, and transfers and executes NM information.

Ethernet interface unit

Ethernet interface unit provides IP communication networkaccess, and transfers and executes NM information andcontrol streams.

Optical interface unit

Optical interface unit converts STM-1 electrical signals tooptical signals.

Clock data recovery (CDR) unit

CDR unit recovers line clock from the digital code stream,and regenerates the received data based on this clock.

Section overhead processing (SOH) unit

Description


Functions


72/254



Receiving end

SOH processing unit searches received frame for framealignment byte to implement frame synchronization, andextracts the SOH after descrambling the frame.

Transmitting end

It inserts SOH into the transmitted data, and scramblestransmitted data into a frame.

Path overhead processing (POH) unit

Receiving end

POH unit processes AU-4 pointer, and separates pathoverhead from the payload.

Transmitting end

POH unit adjusts the AU-4 pointer by inserting the pathoverhead into the payload.

Pointer locking unit

Pointer locking unit maintains pseudo synchronizationrelationship of AU4 or AU3 Synchronous Payload Envelope(SPE) frame rate. In addition, it removes phase and ratedifference between AU3 and AU4 in both directions bylocking floating VC4 in the AU4 bus signals from pathoverhead chip.

Tributary unit

Tributary unit maps/de-maps 63 E1 tributaries to VC4 bus.

Framer unit

Framer unit assembles 2 Mbps signals into frames, andmultiplexes/demultiplexes 2 Mbps signals and 16 Mbpssignals.

Clock unit

Clock circuit locks the 8 KHz clock to 19.44 MHz. Clockindices meet requirements for transmitting stratum-3 clock.


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534HFigure 42 shows the SNM board panel.

F I G URE 42 SNM BO ARD P ANEL

Panel andIndicators


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535HTable 18 shows the SNM board indicators.

T ABL E 18 SNM B O ARD PANEL INDI CAT O RS

IndicatorName

Color Meaning Description NormalStatus


Solid off: Indicatespower off or non-functional CPU

Solid on: Power on

Flashing rapidly (20Hz): Version reading

Flashing slowly (2Hz): Normal running

Flashingslowly


Solid on: Indicatesboard alarm

Solid off: Indicatesnormal boardoperations

Solid off

M/S Green - - Solid on

F0S Green Group 0optical linkindicator

Solid on: Normal

Solid off: Abnormal

Solid on oroff

F1S Green Group 1optical linkindicator

Solid on: Normal

Solid off: Abnormal

Solid on oroff

F2S Green Group 2optical linkindicator(standby)

Solid on: Normal

Solid off: Abnormal

Solid on oroff

F3S Green Group 3optical linkindicator(standby)

Solid on: Normal

Solid off: Abnormal

Solid on oroff

CCS Green Circuitclock RUNstatusindication

Solid on: Normalwhen HW input clocksignal is 8 KHz

Solid off: Abnormalstate

Solid on oroff

536HTable 19 illustrates the SNM board panel buttons.

T ABL E 19 SNM B O ARD P ANEL B UT T O NS


M/S Active/standby Switchoverbutton

Do not perform any function.

RST Reset button Pressing the RST button resets

the board configuration.


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It complies with the following standards:

ITU-T G.704

ITU-T G.774.02

ITU-T G.784

ITU-T G.803

ITU-T G.805

ITU-T G.813

EMC

Electrostatic protection: -6 ~ +6 KV (contact), -10 ~+10KV (no contact)

Caution:

The -48 V power supply input voltage exceeds safety limits forhuman contact. Ensure adequate safety measures. Keep safedistance from power supply parts to avoid any electric shock risk.

CHMCHM board performs forward baseband modulation and reversebaseband demodulation, and implements key CDMA technologiessuch as diversity technology, RAKE reception, softer handover,and power control. Through the dual bus, CHM board connectswith CCM board, and baseband data bus connects CHM boardwith RIM board.

537H

Table 20 illustrates the CHM types.

T ABL E 20 CHM TY PE S

Name ConfigurationInstallation

Location

CHM0 Supports 6 1X carriersector configuration

Both Main andsecondary cabinet

CHM1 Supports 3 DO carriersector configuration Both Main andsecondary cabinet

CHM2 Supports 3 DO carriersector configuration

Both Main andsecondary cabinet

Note:CHM boards (use any combination of the three types) canbe installed in a single CBTS cabinet.

TechnicalIndices

Description

Types


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CHM0

CHM0 board is based upon ASIC chip (QUALCOMM CSM5000)and supports CDMA2000-1X Release A service.

CHM0 board provides the following basic functions:

Completely supports CDMA2000-1X RTT standard, andmodulates/demodulates baseband signals based on systemrequirements.

Provides CCM board communication interfaces, includingmedia stream interface and control stream interface.

Forward link

Converts voice frames distributed from the CCM board

through the Ethernet interface into a standard formatrequired by the baseband processing chip. After basebandprocessing such as convolution coding, element repetition,interleaving, WALSH orthogonal spread, long codescrambling, PN code complicated orthogonal expansion, andQPSK modulation inside the baseband processing chip,baseband signals are output to the RIM board based onsystem configuration of carrier and sector.

Reverse link

Receives antenna data distributed from the RIM board,

performs processing opposite to that of forward link, such asdemodulation, and converts them into voice frames. AfterCPU processing, CCM board receives them through theEthernet interface for switching.

At most, the CHM0 board supports 512 forward ChannelElement (CE) and 256 backward CE.

CHM0 board supports CDMA2000-1x baseband processing innearly six sectors.

It supports remote board software download, remote softreset control and remote power management.

Interchangeable with CHM1 and CHM2 boards.

Description


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538H

Figure 43 shows the CHM0 board block diagram.

F I G URE 43 CHM0 BO ARD B L O CK D I AG RAM

Different CHM0 board units perform the following functions:

CPU unit

CPU unit manages and coordinates with the entire network,and provides multiple external interface controllers.

FE unit

FE unit provides control and media stream interfacesbetween the CHM0 and CCM boards.

CSM ASIC unit

CSM ASIC unit modulates/demodulates voice and dataframes, and implements the CDMA2000-1X RTT physicallayer requirements.

Multiplexing/demultiplexing unit

Multiplexing/demultiplexing unit multiplexes the forwardbaseband signals into high-speed signals. It demultiplexesreverse high-speed signals into baseband data formats.

Control unit

Control unit decodes and controls board peripherals.

Clock unit

Receives and distributes GPS clock required by each boardcomponent.

Power and hot swap unit

Power and hot swap unit supplies required power to theCHM0 board components, provides over-current and over-voltage protection, and supports hot swap function for thepower supply board.


Functions


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539HFigure 44 shows the CHM0 board panel.

F I G URE 44 CHM0 BO ARD PANEL

Note: The panel of CHM0 is marked as CHM

Panel andIndicators


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540H

Table 21 illustrates the CHM0 board panel indicators.

T ABL E 21 CHM0 BO ARD P ANEL INDI CAT O RS

LEDName Color Meaning Description NormalState


Solid on: Indicatesversion running andobtaining networkaddress

Flashing three times persecond (3 Hz): Occursduring board power-on,or booting.(If RUNindicator does not flashthree times at power-on,usually it indicates board

debugging mode or faultyBOOT chip)

Flashing slowly (2/3 Hz):

Notifies the basic power-on process

Normal flashing (10/3Hz): Power-on completedand entering normalworking status.

Flashing slowly(100/7Hz): Interruptionin communication of

media stream and controlstream.

Flashing rapidly once(100/7 Hz), flashingslowly once (5/3 Hz):Control streamcommunicationinterrupted.

Flashing rapidly threetimes (100/7 Hz), flashesslowly three times (5/3Hz): Interruption inmedia stream

communication.Solid off: BOOT versionprogram is loading in theFLASH. (If indicator is notON indicates power-off ornon-functional CPU)

Normalflashing(10/3Hz):


Solid on: Level 1 criticalalarm

Solid off: Runningnormally

Flashing slowly (2/3 Hz):

Level-2 fault

Solid off


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LEDName

Color Meaning DescriptionNormalState

Normal flashing (10/3Hz): Level-3 fault

Flashing slowly (8 Hz):Improper board plugging

SCS Green SystemclockRUNstatusindicator

Solid on: Normal systemclock

Solid off: Abnormalsystem clock

Solid on

BLS Green Basebandlinkstatusindicator

Solid on: Normalbaseband link

Solid off: Abnormalbaseband link

Solid on

TYPE Green Channelboardtypeindicator

1X-RTT (Off) Solid off

541HTable 22 illustrates the CHM0 board panel button.

T ABL E 22 CHM0 BO ARD P ANEL B UT T O N


RST Reset button Pressing the RST button resets the boardconfiguration.

A single CHM0 processes up to 12 sectors of basebandsignals.

EMC

Electrostatic protection: -6 ~ +6 KV (contact), -10 ~ +10KV (no contact)

Service standard supported

CDMA2000-1X RTT standard

Caution:

The -48 V power supply input voltage exceeds safety limits forhuman contact. Ensure adequate safety measures. Keep safedistance from power supply parts to avoid any electric shock risk

Technical

Indices


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CHM1

CHM1 board is based upon ASIC chip (QUALCOMM CSM5500). Itsupports CDMA2000-1X EV-DO services, with forward rateranging from 38.4 Kbps to 2.4576 Mbps and reverse rateranging from 9.6 Kbps to 153.6 Kbps.

CHM1 board performs following basic functions:

CHM1 board has two external 100 MB Ethernet interfaces, formedia and control streams.

Provides CCM board communication interfaces includingmedia and control stream interfaces.

Forward link

Converts CCM board data frames through forward CPU into astandard format required by CSM5500. After basebandprocessing such as convolutional coding, element repetition,interleaving, WALSH orthogonal spread, long codescrambling, and PN code orthogonal expansion, basebandsignals are output to the RIM board based on carrier-sectorconfiguration.

Reverse link

Receives data distributed from the RIM board through thebaseband data interface. Reverse baseband processing partconverts them into voice frames. After reverse CPU systemprocessing, CCM board receives frames for switching throughthe Ethernet interface.

Supports the CHM0 mixed insertion.

At most, supports 192 forward CE and 96 backward CE.

CHM1 board supports CDMA2000-1x EV-DO basebandprocessing in nearly three sectors.

Description


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542HFigure 45 shows the CHM1 board block diagram.

F I G URE 45 CHM1 BO ARD B L O CK D I AG RAM

Different CHM1 board units perform the following functions:

Forward CPU

Forward CPU controls and processes forward, includingstorage and the debugging interface.

Reverse CPU

Reverse CPU performs operation and maintenance, boardcontrol, and dynamic logic download with CCM board.

Forward baseband processing unit

Forward baseband processing unit modulates forward data.

Reverse baseband processing unit

Reverse baseband processing unit demodulates reverse dataand performs turbo decoding.

Switching unit

Switching unit switches forward/reverse control and mediastreams, to CCM board control and media stream interfaces.

Multiplexing/demultiplexing unit

Multiplexing/demultiplexing unit multiplexes the forwardbaseband signals into high-speed signals. It demultiplexesreverse high-speed signals into baseband data formatssupported by the modulation/demodulation chip.

Clock receiving unit

Clock receiving unit receives and distributes GPS clock

required by each board component.


Functions


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Power and hot-swap unit

Power and hot-swap unit supplies required power to theboard components, provides over-current and over-voltageprotection, and supports power supply board hot swap

function.

Decoding and control unit

Decoding and control module decodes and controls boardperipherals.

543HFigure 46 shows the CHM1 board panel.

F I G URE 46 CHM1 BO ARD P ANEL

Note: The panel of CHM1 is marked as CHM

Panel andIndicators


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544H

Table 23 illustrates CHM1 board panel indicators.

T ABL E 23 CHM1 BO ARD P ANEL I NDI CAT O RS

LEDName Color Meaning Description Normal State


Solid on: Indicates versionrunning and obtainingnetwork address

Flashing three times persecond (3 Hz): Occursduring board power-on, orbooting.(If RUN indicatord

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