gsm bss engineer training trainees' guide issue 3.0

GSM BSS Product Training

Trainees’ Guide

ISSUE 3.0

GSM BSS Engineer Training Trainees Manual ISSUE 3.0 Table of Contents

Table of Contents

Chapter 1 OMA000001 GSM Fundamentals.................................................................................1

Chapter 2 OMD001101 GSM BSC Hardware Structure................................................................3

Chapter 3 OME201101 GSM BTS312 Hardware Structure...........................................................5

Chapter 4 OMO001101 OMC overview..........................................................................................7

Chapter 5 OMD000203 GSM BSC Auto Data Configuration........................................................8

Chapter 6 OMD000201 GSM BSC Maintenance Console..........................................................15

Chapter 7 OME001202 GSM BTS O&M.......................................................................................16

Chapter 8 OMD006201 GSM Alarm System................................................................................17

Chapter 9 OMD007201 GSM BSC Traffic Statistic.....................................................................18

Chapter 10 OMD000301 GSM BSC Trouble Shooting................................................................19

Chapter 11 OME100301 GSM BTS Trouble Shooting................................................................21

Chapter 12 Appendix A: Training Checklist...............................................................................22

Chapter 13 Appendix B: Abbreviations...........................................................................................23

Confidential Information of Huawei. No Spreading without Permission i

GSM BSS Engineer Training Trainees Manual ISSUE 3.0Error! Style not defined.Error! Style not

defined.

Chapter 1 OMA000001 GSM Fundamentals

1.1 Course Objectives

Key knowledge Objectives

System structure of GSM system Understanding basic Concepts of GSM system

1.2 References

《BSC Technical Manual》

1.3 Written Exercise

1.1.1 Fill in the blanks

1) GSM system include______, ______, ______, ______.2) The frequency band GSM used in GSM900: Downlink from ______ to______;

uplink from ______ to______; 3) IMSI include ______, ______, ______.4) The speech-coding of GSM system is ______; the modulation used in GSM

system is ______.

1.1.2 Single-choice

5) The Signaling used in A interface is __________

A) No.7 B) LAPD C) LAPDm D) HDLC

6) Which CGI number is correct :______A) 621300855 B) 080308558899C) 6213008551201 D) 23408030855

7) System information is transmitted in _________A) Broadcast Channels B) Common Control ChannelsC) Dedicated Control Channels D) Traffic Channels

8) Random access information is transmitted in _________A) Broadcast Channels B) Common Control ChannelsC) Dedicated Control Channels D) Traffic Channels

1.1.3 Multiple-choice (more than one possible correct answers)

9) Which technologies can be used to reduce the effect of interference:A) Power Control B) DTX C) DiverseD) Frequency Hopping E) GMSK F) DRX

1.1.4 Brief answer

10) What protocols are used on the interface of Um, A-bis or A in the GSM system?

Confidential Information of Huawei. No Spreading without Permission 1


defined.

11) What are the main logic channels of the Um interface and what are their respective functions?

12) Please describe how the physical channel and the logic channel are used when a mobile phone is switched on.

Confidential Information of Huawei. No Spreading without Permission2


defined.

Chapter 2 OMD001101 GSM BSC Hardware Structure



System structure of BSC

Understanding the structure of BSCUnderstanding the structure of AM/CMUnderstanding the structure of BMUnderstanding voice processUnderstanding signaling processUnderstanding clock systemUnderstanding loading process

1.5 References

《BSC Technical Manual》

《BSC Hardware Description Manual》



(1) In BM module, ________, ________, _______are working in active/standby mode.

(2) One BSC system can support _________basic modules, _________sites, ______TRX in FR, or ______TRX in HR.

(3) Each LPN7 board can provide________ links, each GLAP board can provide _______ links.

2.1.2 Single-choice

(4) Which of the following board is the signaling switching center of AM/CM? ______

A) MCCM B) MCCS C) SNT D) CTN(5) Which of the following board is the voice switching center of AM/CM? ______

A) MCCM B) MCCS C) SNT D) CTN(6) We use ______ board to accomplish the TRAU function.

A) BIE B) FTC C) MSM D) E3M(7) We don’t use ______ board to accomplish the Multiplex function.

A) BIE B) FTC C) MSM D) E3M(8) Loading program and data from BAM, the SW1-6 and SW1-5 in MPU board

should be turn to :A) ON, ON B) OFF, ON C) OFF, OFF D) ON, OFF

(9) Which of the following board is not related with the No.7 signaling link?A) FTC B) E3M C) TTBIE D) LPN7

(10) Which of the following board is not related with the LAPD link?A) MPU B) BIE C) GLAP D) LPN7



defined.

2.1.3 Brief answer

(11) Please describe the voice process of BSC.

(12) Please describe the signaling process of BSC.

(13) Please describe the loading process of BSC.

(14) Please describe the clock system of BSC.



defined.

Chapter 3 OME201101 GSM BTS312 Hardware Structure



System structure of BTS312Knowing the functions and features of BTSMastering the BTS hardware structureMastering the signal processing of BTS

1.8 References

《BTS312 User Manual》



(1) BTS312 is formed with __________, ___________, __________three parts.(2) Each BTS cabinet (BTS312 indoor type) can accommodate _____ TRXs.

3.1.2 Single-choice

(3) Through which type of board, BTS312 connects to BSC? _______A) PMU B) TMU C) PSU D) BIE

(4) With maximum configuration, BTS 312 can support :____A) S 12/12/12 B) S 18/18/18C) S 24/24/24 D) S 32/32/32

(5) How many E1 ports can one BTS312 provide:______A) 2 B) 4 C) 6 D) 8

(6) With maximum configuration, One E1 can carry ____TRX in FR mode?A) 10 B) 12 C) 13 D) 15

(7) With maximum configuration, One E1 can carry ____TRX in HR mode?A) 10 B) 12 C) 13 D) 15


(8) Which component is used in HUAWEI's BTS?A) CDU B) EDU C) SCU D) CCU

(9) Which kinds of BUS we use in BTS312:_____A) DBUS B) CBUS C) TBUS D) FHBUS

(10) TMU board includes :______A) BIU B) OMU C) MCK D) EAC



defined.

3.1.4 Brief answer

(11) Please describe the voice process of BTS.

(12) Please describe the signaling process of BTS (including OML and RSL).

(13) Please describe the clock system of BTS.

(14) How to configure the antenna feed components and the PSUs of a S4/4/4 site?



defined.

Chapter 4 OMO001101 OMC overview



The functions of OMC systemKnowing the network structure of OMCKnowing the main functions of OMC

1.11 References

《BSC Routine Operation manual》


4.1.1 Brief answer

(1) Please describe the structure of OMC system.



defined.

Chapter 5 OMD000203 GSM BSC Auto Data Configuration



Data Configuration of BSSMastering Initial data configurationMastering dynamic data configuration

1.14 References

《Data Configuration Manual》


5.1.1 Judge the following

（1） Auto configuration file autocfg.dat is stored in BAM side under directory C:\OMC\BSC\BAM\dload\cfgdata（）

（2） Start OMC LocalWS in a WS, choose the IP address 127.0.0.1, and then you can modify the BAM data with auto data configuration console.（）

（3） No matter starting the auto data configuration console on OMC Shell or OMC LocalWS, system gets data configuration file from BAM via FTP. And when setting the data into the host, it also adopts FTP.（）

（4） Under the grant of advanced user, a user gets the ordinary user password and then he can perform initial data configuration and dynamic data configuration.（）

（5） After transferring over initial configuration console, we can use dynamic configuration console to set the data into BSC hosts.（）

（6） If the auto data configuration console’s version is higher than the version of configuration file autocfg.dat , it can run normally.（）

（7） If the auto data configuration console’s version is lower than the version of configuration file autocfg.dat , it will prompt unknown object and cannot run.（）

（8） There are two correct ways to exit auto configuration console: one is to close the auto configuration console and then close the OMC Shell or OMC LocalWS; the other is to close OMC Shell or OMC LocalWS and then close the auto configuration console. （）

（9） Choosing ‘multi-module device’ in initial configuration console when configuring the device type, the ‘module number’ should be configured according to the practical situation and the range is up to 8.（）

（10） Setting the device type in initial configuration console, if you swap the device type between single-module and multi-module, the existing data will be lost. So, for the data safety, such operation is recoverable. （）

（11） In initial configuration console, the even numbered the E3M must correspond to the TCSM units in even numbered frame, otherwise the TCSM units cannot work. （）



defined.

（12） In initial configuration console, you can add BTS by double-click on any BIE in the BIE active/standby group. （）

（13） When modifying the cell’s channel type, if the cell is hopping, we need to modify it to a not hopping cell in advance. And after modifying we should recover it to hopping cell. （）

（14） If you modify the frequency of BCCH TRX, the cell needs initialization.（）（15） If you delete a site in auto data configuration console, all the cells and the

TRXs are deleted. If there is cascaded site under the site to be deleted, it will also be deleted. （）

（16） In initial configuration console, we can only delete modules from the last one. （）

（17） In routine maintenance, if data transfer is performed, then it is mandatory to convert BAM data and reset BSC to load data. （）


（18） The data for BSC system is stored in ___________________________, and the program is stored in _____________in BAM.

5.1.3 Single-choice

（19） Signaling point code length of BSC are ____digits.A) 24 B) 14 C) 8 D) 16

（20） The link ID of LPN7 board is:A) 0~7 B) 4~7 C) 8~11 D) 4~11

（21） Both initial configuration console and dynamic configuration console can backup auto configuration file autocfg.dat in FTP server. The FTP sever is located in（）

A) OMC SERVER

B) BAM

C) The terminal where the configuration console is started

D) BSC hosts

（22） If the FTP Server is not started, there is not an icon of FTP Server. You can run Ftps.exe to restart the FTP Server. The file Ftps.exe is stored in: ( )

A) \\BAM\C:\OMC\BSC\BAM\dload

B) \\ BAM \ C:\OMC\SHELL

C) \\BAM\C:\OMC\BSC\BAM

D) \\BAM\C:\OMC\BAMLog

（23） Each time we perform ‘batch modify cell’s network parameter’, we can only select the cell parameters using the same command word. And the quantity of the cells to be modified should not exceed:（）

A) 6 B) 10 C) 16 D) 20 （24） In a multi-module BSC, how many CCS7 links does an E3M support at

most? （）A) 1 B) 2 C) 4 D) 8

（25） Sometimes it appears ‘ Fail to get data from FTP server. And auto data configuration system will exit.’ as you start auto configuration console. Which of the following will not cause this problem. （）

A) FTP SERVER not startedB) Pure network qualityC) There is no autocfg.dat file in BAM


ftp://Ftp.exe/


defined.

D) Version mismatch

5.1.4 Multiple choice

（26） It is forbidden to delete or modify the files in C:\OMC\BSC\BAM\dload\ . In this directory, there are:（）

A) DB_*.DAT for each moduleB) cc08.snt、cc08.ctn、cc08.mcm、cc08.mcs、cc08.bsm、FSK.datC) The configuration file created by auto data configuration console after transferD) Foreground data

（27） About the edit lock function, which ones of the following are correct?（）A) The edit lock function is adopted to avoid multiple WSs modifying as that

can cause DBF data out of orderB) The advanced user can obtain the edit lock authorityC) When a user obtained the edit lock authority, others can only enter data

viewing modeD) If the WS with the edit lock authority exit auto configuration console

abnormally, we must start auto configuration console again and exit correctly to unlock BAM

（28） Which of the following can cause effect to current calls?（） C) Modify cell’s BCC and NCCD) Modify cell’s propertyE) Modify cell’s FH propertyF) Modify cell’s CGIG) Modify cell’s system information

（29） BSC auto data configuration console has ( ) work modeA) Initial configuration B) Dynamic configurationC) Data managementD) Data viewing

5.1.5 Brief answer

（30） How to get the data which used for loading?

（31） The directory which autocfg.dat, *.dbf, db_*.dat stored

（32） If the data of BAM is “Locked”, how can we do?



defined.

1.16 Laboratory Exercise

5.1.6 Scenario


GSM BSS Engineer Training Trainees Manual ISSUE 3.0 Error! Style not defined.Error! Style not defined.

Module

number

Signaling

Link

SLC CIC TTBIE TS MSM TS

TSCM number

& location

Site type

&trunk mode

Cell ID CGI Frequency TRX No.

1AM/CM+1BM 5

9

0

1

0-159 18(0 port )

19(1 port)

16

16

5FTC,2MSM

unit 0 in frame 4

unit 2 in frame 5

S2/2/2, with PBU

star Networking:4 E1

port* 6TRX/port

Cell1

Cell2

Cell3

6170100090407

6170100090408

6170100090409

124,109

88,81

85,103

1,3

5,7

9,11

1AM/CM+2BM

One No.7 link in one BM

6

8

1

2

0-159 16(0 port )

17(1 port)

16

16

5FTC,2MSM

unit 3 in frame 4

unit 0 in frame 5

BM1:Site1:S2/2/2,with PBU

BM2:Site2:S2/2/2,with PBU

Chain Networking:2 E1 port multiplex/port-single chain

Site1

Cell1

Cell2

Cell3

Site2

Cell4

Cell5

Cell6

Site1

46000000903F3

46000000903F4

46000000903F5

Site2

46000000903F6

46000000903F7

46000000903F8

Site1

3,20

88,81

60,70

Site2

520,530

540,550

560,570

Site1

1,3

5,7

9,11

Site2

1,3

5,7

9,11

1AM/CM+2BM

One No.7 link in one BM

4

8

3

4

0-159 14(0 port )

15(1 port)

16

16

5FTC,2MSM

unit 1 in frame 4

unit 0 in frame 5

BM1:Site1:S1/1/1/2/2/2,

without PBU

BM2:Site2:GSM900&1800 S3/3/3 (one TRX in 900M, two TRX in 1800), without PBU

Site3:O1,BTS3001C,

connect to Site2

Trunk mode: 6 E1 port half rate topology

Site1

Cell1

Cell2

Cell3

Cell4

Cell5

Cell6

Site2

Cell7

Cell8

Cell9

Site3

Cell10

Site1

61701000903F3

61701000903F4

61701000903F5

61701000903F6

61701000903F7

61701000903F8

Site2

61701000903F9

61701000903FA

61701000903FB

Site3

61701000903FC

Site1

10

20

30

520,530

540,550

600,610

Site2

1,640,650

5,660,670

9,680,690

Site3

120

Site1

0

4

8

2,3

6,7

10,11

Site2

0,2,3

4,6,7

8,10,11

Site3

0



defined.

5.1.7 Task 1：Initial Data Configuration

1. Networking

2. Steps

Note:

Backup the data of BAM first!

Autocfg.dat, *.dbf, modutype.str, db_*.dat

Step 1: Set Device Property

Step 2: Set AM/CM Data: Set ccs7 link (E3M)

Step 3: Set BM Data: Set the quantities of Boards

Step 4: Set Local Office Data

Signaling Network Indicator: National (for Nigeria)

MSC SPC, BSC SPC

Signaling Network Code Mode: National, 14bit

Step 5: Set site

Select Trunk Mode

Add a Site: Select Site Type

Add TRX

Set the quantities of Boards in site

*Set Site Property

Step 6: Set cell

Add cells

Set Cell Property Data

Set Cell TRX Property: frequency and channel type

Set Network Parameters

Step 7: Set Neighbor cells

Step 8: Transfer data and Convert data

5.1.8 Task 2：Dynamic Data Configuration

Sub-task 1: Add a site

Step 1: Select BIE board

Step 2: *Select Trunk Mode

Step 3: Add a Site: Select Site Type

Step 4: Add TRXs

Step 5: Modify the site

Step 6: Add cells

Step 7: Modify cells

Set Cell Property Data

Set Cell TRX Property: frequency and channel type




defined.

Step 8: Set Neighbor cells (another operation)

Sub-task 2: Add a TRX

Step 1: Select site

Step 2: Add TRX

Step 3: Modify site property (CDU、EDU；PSU)

Step 4: Modify cell property

Assign TRX to cell

Modify CA table

Set TRX Property


Sub-task 3: Modify the frequency of a TRX

Step 1: Select cell

Step 2: Add cell effective frequency

Step 3: Select TRX

Step 4: Modify the frequency of TRX

Sub-task 4: Modify a cell to support half rate

Sub-task 5: Change BCCH to another TRX



defined.

Chapter 6 OMD000201 GSM BSC Maintenance Console



BSC Daily MaintenanceMastering the operations on BSC maintenance console

1.18 References



6.1.1 Single-choice

(1) We can get the BSC boards status by:A) Circuit control B) Equipment control C) Link management D) GSM interface tracing


(2) Which interfaces can be traced in BSCA) A interface B) C interface C) Abis interface D) Um interface

(3) The normal circuit status should be:A) Idle B) Block C) Line Busy D) uninstalled


6.1.3 Daily Maintenance

Checking the state of modules

Checking the board of BSC

Checking the Usage of GMPU (CPU)

Checking the circuit of A interface (normal state)

Checking the state of CCS7 link (normal state)

6.1.4 Locating faults

Interface tracing

Switchover

Board resetting

Module resetting



defined.

Chapter 7 OME001202 GSM BTS O&M



Remote MaintenanceTerminal Maintenance

Mastering the operations on BTS maintenance consoleMastering BTS routine maintenance tasks

1.22 References


《BTS312 User Manual》


7.1.1 Multiple-choice

(1) The normal channel status should be:A) I (Idle) B) B (Block) C) A (Active) D) O (Out of Service)

7.1.2 Brief answer

13) How to confirm the transmission between BSC and BTS?

14) The difference of “Lock” and “Shutdown”



Perform Multi-site Fault Query to find whether there are abnormal sites

Perform Site Test and check the board warning for the abnormal BTS to locate the problem

Check the channel state for all the BTS to confirm the running situation

7.1.4 Locating faults

Software loading & activation

Lock Cell；Lock or Shutdown BT

Forced handover



defined.

Chapter 8 OMD006201 GSM Alarm System



BSC Alarm System StructureAlarm type and Alarm Level

Mastering the operations on Alarm console

1.26 References



8.1.1 Multiple-choice

(1) In Huawei's system, the alarm type is:A) Fault alarm B) Hardware alarmC) Event alarm D) Recovery alarm

15) In Huawei's system, the alarm level is:A) Emergency level B) major levelC) Minor D) warning level



Checking the real-time alarm

Querying the history alarm



defined.

Chapter 9 OMD007201 GSM BSC Traffic Statistic



BSC Traffic Statistic System Structure

Mastering the operation of registering a new taskChecking the results of the task Understanding the usage of template Solving simple troubles in traffic statistics

1.30 References

《BSC Traffic Statistic Manual》


9.1.1 Single-choice

(1) In Huawei's Traffic statistic system, the quantities of task per BM is:A) 100 B) 200 C) 300 D) 400

16) In Huawei's Traffic statistic system, the quantities of subtask per BM is:A) 1000 B) 2000 C) 3000 D) 4000


9.1.2 Task

Registering a new task

Checking the result of tasks (by time or by object)

Defining a new template

Defining a new item



defined.

Chapter 10 OMD000301 GSM BSC Trouble Shooting



Typical CasesKnowing how to find faults in BSCKnowing the common fault typesMastering BSC fault disposal method

1.34 References

《BSS Troubleshooting Manual》


1.36 Troubleshooting Exercise

10.1.1 Requirements and Tips

Note:

Please pay attention to the safety of the equipment.

1.36.1 Troubleshooting Case Report 1

Fault Description

Completion Criterion

Troubleshooting Method

Troubleshooting Process

What is Learned From the Case



defined.


Fault Description

Completion CriterionTroubleshooting Method




Fault Description

Completion CriterionTroubleshooting Method





defined.

Chapter 11 OME100301 GSM BTS Trouble Shooting



Typical CasesKnowing how to find faults in BTSKnowing the common fault typesMastering BTS fault disposal method

1.38 References

《BSS Troubleshooting Manual》


1.40 Troubleshooting Exercise

11.1.1 Requirements and Tips

Note:

Please pay attention to the safety of the equipment.


Fault Description

Completion Criterion

Troubleshooting Method





defined.

Chapter 12 Appendix A: Training Checklist

Your Name：

Skill Operation Description Grasp or not

Data Configuration

1. Modify some parameters:CGI, Channel Type, Power Class, etc.

□Yes □No

2. Modify the frequency of TRX □Yes □No3. Add a TRX and correlative board (PSU, CDU, etc.) □Yes □No4. Add a new site and its adjacent cells □Yes □No

Check AlarmAccording to Alarm message, you can do "WWW"

1. Where: Locate the position of the alarm: Module No., Site Name, Board or Card No., Port No.

□Yes □No

2. When: the time alarm happened □Yes □No3. Why: locate the possible causes of some common fault (power, transmission, board)

□Yes □No

BSC routine maintenance

1. Check the state of modules and know what status is normal status

□Yes □No

2. Check the board of BSC and know what status is normal status

□Yes □No

3. Check the Clock of BSC (GCKS) and know what status is normal status

□Yes □No

4. Check the circuit of A interface (FTC) and know what status is normal status

□Yes □No

5. Check the No.7 links of BSC (LPN7) and know what status is normal status

□Yes □No

6. Check the Usage of CPU and know what status is normal status

□Yes □No

BTS routine maintenance

1. Perform “Multi-site Fault Query” to find whether there are abnormal sites

□Yes □No

2. Check the “board warning” in abnormal BTS and locate the cause of the problem according to “recovery suggestion”

□Yes □No

3. Use “lock” or “shutdown” in different condition □Yes □No

Traffic Statistic

1. register the task for routine maintenance (BSC measurement, cell measurement, CPU measurement)

□Yes □No

2. Check the result and get the important data (Traffic Volume, call drop rate, congestion rate, handover successful rate)

□Yes □No

BSC troubleshooting

1. Solve the fault of OMCCan’t□□□□grasp

2. Solve the fault of No.7 linkCan’t□□□□grasp

3. Solve the fault of AccessCan’t□□□□grasp

4. Solve the fault of VoiceCan’t□□□□grasp

BTS troubleshooting 1. Solve the fault of Transmission Can’t□□□□gras



defined.

Skill Operation Description Grasp or notp

1. Solve the fault of Antenna & feederCan’t□□□□grasp

Chapter 13 Appendix B: Abbreviations

AAB Access Burst

AC Access Class (C0 to C15)

Alternating CurrentACCH Associated Control CHannelACELP Algebraic code excitation linear predictionACU Alternating Current UnitAGCH Access Grant ChannelAI Action IndicatorAM/CM Administration Module/Communication ModuleANSI American National Standard InstituteAPL Advanced Phase LockingARFCN Absolute Radio Frequency Channel NumberASIC Application Specific Integrated CircuitAUC Authentication CentreBBA BCCH AllocationBAM Back Administration ModuleBCC BTS Color CodeBCCH Broadcast Control ChannelBCF Base Control FunctionBCH Broadcast ChannelBER Bit Error RateBFI Bad Frame IndicationBHCA Busy Hour Call AttemptsBIE Base Station Interface EquipmentBITS Building Integrated Timing SupplyBM Basic ModuleBm Full-rate traffic channelBP Burst Pulse

Burst PeriodBQ Bad QualityBS Base StationBSC Base Station ControllerBSIC Base Station Identity CodeBSMU Base Station Interface UnitBSS Base Station SystemBSSAP Base Station System Application PartBSSMAP Base Station System Management Application PartBSSOMAP Base Station System Operation and Maintenance Application PartBTS Base Transceiver StationBTSM BTS ManagementBVC BSSGP Virtual ConnectionCC/R Command/Response field bitCA Cell AllocationCAMEL Customized Applications for Mobile network Enhanced LogicCBA Cell Bar Access



defined.

CBC Cell Broadcast CenterCBCH Cell Broadcast ChannelCBQ Cell Bar QualifyCC Connection Confirm

Call ControlCountry CodeCall Control

CCBS Completion of Calls to Busy SubscribersCCCH Common Control ChannelCCH Control ChannelCCS Common Channel SignalingCD Call DeflectionCDB Cell Broadcast DatabaseCDU Combining and Distribution UnitCELP Code Excited Linear PredictionCGI Cell Global IdentityCI Cell IdentityCIC Circuit Identification CodeCIR Carrier to Interference RatioCKSN Ciphering Key Sequence NumberCM Connection Management CMB Common resource BackplaneCPU Central Processing UnitCR Connection RequestCRC Cyclic Redundancy CheckCRO Cell Reselect OffsetCS Coding SchemeCS-1,2,3,4 Code Scheme-1,2,3,4CTN Central Switching Network BoardCUI Carrier Unit Interface ControllerDDB Dummy BurstDBF Database FileDBMS Database Management SystemDC Direct CurrentDCCH Dedicated Control ChannelDCL Diagnostic Control LinkDCU Direct Current UnitDDN Digital Data NetworkDL Downlink

Data Link (layer)DLC Data Link ConnectionDLCEP Data Link Connection End PointDLCEPI Data Link Connection End Point IdentifierDLCI Data Link Connection IdentifierDm Control channelDNS Domain Name ServerDPC Destination (Signaling) Point CodeDRX Discontinuous reception (mechanism)DSC Downlink Signaling fault CountDTAP Direct Transfer Application PartDTMF Dual Tone Multi FrequencyDTX Discontinuous transmission (mechanism) EE3M E3 Sub-MultiplexerEA Early AllocationE-Abis Enhanced AbisEAC External Alarm CollectionEC Emergency CallECSC Early Classmark Sending ControlECT Explicit Call Transfer



defined.

EDU Enhanced Duplexer UnitEFR Enhanced Full Rate speech codeEIR Equipment Identify RegisterEM Extended MeasurementEST EstablishmentETS European Telecommunication StandardETSI European Telecommunications Standards InstituteFFACCH Fast Associated Control ChannelFACCH/F Fast Associated Control Channel/Full rateFB Frequency correction BurstFBC Photoelectric Conversion BoardFBI Optical Fiber Interface BoardFCCH Frequency Correction ChannelFCS Frame Check SequenceFDMA Frequency Division Multiple AccessFH Frequency HoppingFIR Finity Impulsion ResponseFN Frame NumberFPU Frame Processing UnitFR Frame Relay

Full RateFTC Full Rate TranscoderFTP File Transfer ProtocolFU Frame UnitFUC Frame Unit ControllerFUL Radio Signaling LinkGG-Abis GPRS AbisGALM Alarm boardGCKS Clock sourceGCTN Central switching Network boardGEMA Emergency Action boardGFBI Fiber Interface boardGGSN Gateway GPRS Support NodeGLAP LAPD Protocol Process boardGMC2 Inter-Module Communication board GMCC Module Communication and Control boardGMEM Memory boardGMM GPRS Mobility ManagementGMPU Main Process UnitGMSC Gateway Mobile Switching CenterGMSK Gaussian Minimum Shift Keying (modulation)GNET Switching Network boardGNOD Node Communication BoardGOPT Local Optical Interface BoardGPRS General Packet Radio ServiceGPS Global Position SystemGSMGSM900GSM1800

Global System for Mobile communications

GSN GPRS Support NodeGSNT GSM Signaling Switching Network BoardGT Global TitleHHCS Hierarchical Cell StructureHDLC High level Data Link ControlHDSL High speed Digital Subscriber LineHLR Home Location RegisterHO HandoverHPA High magnification Power Amplifier board



defined.

HSC Hot Swap ControllerHSN Hopping Sequence Number

HWHighway

IID Identification/IDentityIE (signaling) information elementIEC International Electrotechnical CommissionIF Information frames IMEI International Mobile station Equipment IdentityIMSI International Mobile Subscriber IdentityIND IndicationIOMU iSite Operation and Maintenance UnitIP Internet ProtocolISDN Integrated Services Digital NetworkISUP Integrated Services Digital Network User Part/ISDN User Part

ITU-TInternational Telecommunication Union - Telecommunication Standardization Sector

IWF Interworking FunctionLL1 Layer 1L2 Layer 2L2ML Layer 2 Management LinkL3 Layer 3LA Location AreaLAC Location Area CodeLAI Location Area IdentityLAPB Link Access Protocol BalancedLAPD Link Access Protocol on the D channelLAPDm Link Access Protocol on the Dm channelLLC Logical Link ControlLm Half rate traffic channelLMT Local Maintenance TerminalLNA Low Noise AmplifierLPN7 Common Channel Signaling Processing BoardMMA Mobile AllocationMAC Media Access ControlMACN Mobile Allocation Channel NumberMAI Mobile Allocation IndexMAIO Mobile Allocation Index OffsetMAP Mobile Application PartMBR Multiband ReportMCC Mobile Country CodeMCK Main Clock boardMDC Message DiscriminationMDSL Medium Bit-rate Digital Subscriber LoopMDT Message DistributionME Mobile EquipmentMFU Microcell Frame UnitMM Mobility ManagementMMI Man Machine InterfaceMMU Multiplication and Management UnitMNC Mobile Network CodeMNS Mobile Network SignalingMPH Management entity - Physical layer [primitive]MR Measurement ResultMRP Multiple Reuse PatternMRT Message RoutingMS Mobile StationMSC Mobile-services Switching Centre, Mobile Switching Centre



defined.

MSISDN Mobile Station International ISDN NumberMSM MSC Subrate channel MultiplexerMT

Mobile Terminal

MTP Message Transfer PartNNB Normal BurstNC Network ControlNCC Network Color CodeNCH Notification ChannelNM Network ManagementNS Network ServiceNSE Network Service EntityNSS Network Sub SystemOO&M, OM Operations & MaintenanceOAM Operation Administration and MaintenanceOCXO Oven voltage Control OscillatorOM Operation and MaintenanceOMC Operations & Maintenance CentreOML Operations & Maintenance LinkOMU Operation and Maintenance UnitOPC Originating Point CodeOSI Open Systems InterconnectionOSI RM OSI Reference ModelPPACCH Packet Associated Control ChannelPAD Packet Assembly/Disassembly facility PAGCH Packet Access Grant ChannelPAU Power Amplifier UnitPb Pb InterfacePBCCH Packet Broadcast Control ChannelPBGT Power BudgetPbSL PCU-BSC Signaling LinkPBU Power Booster Unit PCCCH Packet Common Control ChannelPCH Paging ChannelPCIC Packet Circuit Identity CodePCM Pulse Code ModulationPCU Packet Control UnitPD Protocol DiscriminationPDCH Packet Data ChannelPDH Plesiochronous Digital HierarchyPDP Packet Data ProtocolPDTCH Packet Data Traffic ChannelPH Physical (layer)PIN Personal Identity NumberPLMN Public Land Mobile NetworkPMU Power and Environment Monitoring UnitPNCH Packet Notification ChannelPOMU Packet Operation & Maintenance UnitPON Passive Optical NetworkPP Point-to-PointPPCH Packet Paging ChannelPRACH Packet Random Access ChannelPSI Packet System InformationPSK Phase Shift KeyingPSTN Public Switched Telephone NetworkPSU Power Supply UnitPT Penalty TimePTCCH Packet Timing advanced Control Channel



defined.

PTM-M Point To Multipoint MulticastPTP Point To Point

PWCSecondary Power Supply Board

QQoS Quality of ServiceRRACH Random Access ChannelRBER Residual Bit Error RatioRCU Receiver UnitRE ReestablishmentRF Radio FrequencyRFN Reduced TDMA Frame NumberRIL3 Radio Interface Layer 3RLC Radio Link ControlRNTABLE Table of 128 integers in the hopping sequenceRPE-LTP Regular Pulse Excitation-Long Term PredictionRPPU Radio Packet Process UnitRPU Radio frequency Process UnitRR Radio Resource managementRSL Radio Signaling LinkRSM(RR') Radio Sub-system ManagementRXLEV Received signal levelRXQUAL Received Signal QualitySSABM Set Asynchronous Balanced ModeSACCH Slow Associated Control ChannelSACCH/C4 Slow Associated Control CHannel/SDCCH/4SACCH/C8 Slow Associated Control CHannel/SDCCH/8SACCH/T Slow Associated Control CHannel/Traffic channelSACCH/TF Slow Associated Control CHannel/Traffic channel Full rateSAP Service Access PointSAPI Service Access Point IdentifierSB Synchronization BurstSCCP Signaling Connection Control PartSCH Synchronization ChannelSCMG SCCP ManagementSCN Sub-Channel NumberSCU Simple combining UnitSDCCH Stand-alone Dedicated Control ChannelSDH Synchronous Digital HierarchySDU Service Data UnitSFH Slow Frequency HoppingSGSN Serving GPRS Support NodeSID Silence DescriptorSIG SignalingSIM Subscriber Identity ModuleSITE SiteSLM Signaling Link ManagementSLS Signaling Link SelectionSM Sub-Multiplexer InterfaceSMBCB Short Message Service Cell BroadcastSMC Short Message CenterSMI Sub-Multiplexer Interface SMS Short Message ServiceSMSCB Short Message Service Cell BroadcastSMUX Sub-MultiplexerSOR Support Optimization RoutingSP Signaling PointSRM Signaling Route ManagementSS Supplementary Service



defined.

SS7 Signaling System Number 7SSN SubSystem NumberSTM

Signaling Traffic Management

STP Signaling Transfer PointSTU Site Test Unit (board)TTA Timing AdvanceTAI Timing Advance IndexTBF Temporary Block FlowTBU Transceiver Baseband UnitTC TranscoderTCH Traffic ChannelTCH/F A full rate TCHTCH/F2.4 A full rate data TCH (2.4kbit/s)TCH/F4.8 A full rate date TCH (4.8kbit/s)TCH/F9.6 A full rate data TCH (9.6kbit/s)TCH/FS A full rate Speech TCHTCSM Transcoder and Sub-MultiplexerTDMA Time Division Multiple AccessTDP Transmitter Driver and PLLTDU Timing Distribution UnitTE Terminal EquipmentTEI Terminal Equipment IdentifierTES Transmission Extension power Supply unitTEU Transmission Extension UnitTFI Transport Format IndicatorTFO Tandem Free OperationTI Transaction IdentifierTLLI Temporary Link Level IdentityTMSC Tandem Mobile Switching CentreTMSI Temporary Mobile Subscriber IdentityTMU Timing/Transmission and Management UnitTN Timeslot NumberTO Temporary OffsetTRAU Transcoder & Rate Adaptation UnitTRB Transceiver BackplaneTRX TransceiverTS Time Slot

Technical SpecificationTSC Training Sequence CodeTUP Telephone User PartUUA Unnumbered AcknowledgeUDT Unit DataUI Unnumbered Information (frame)USF Uplink State FlagUSSD Unstructured Supplementary Service DataVVAD Voice Activity DetectionVBS Voice Broadcast ServiceVEA Very Early AllocationVGCS Voice Group Call ServiceVLR Visitor Location RegisterVM Voice MailboxVSAT Very Small Aperture TerminalVSWR Voltage Standing Wave RadioWWS WorkstationXxDSL x Digital Subscriber Line



defined.

ZZCS Zero Current SwitchZVS Zero Voltage Switch


gsm bss engineer training trainees' guide issue 3.0

Documents

blanks1 gsm system

omd006201 gsm alarm

bsc system

oma000001 gsm fundamentals1

frequency band gsm

omd000301 gsm bsc trouble

abbreviations chapter

ome100301 gsm bts trouble