fdocuments.in_gsm-bss-engineer-training-trainees-guide-issue-30.doc

GSM BSS Product Training
Trainees’ Guide
ISSUE 3.0

GSM BSS Engineer Training Trainees Manual ISSUE 3.0 Table of Contents
Confidential Information of Huawei. No Spreading without Permission i
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 ....................................................... 16
Chapter 7 OME001202 GSM BTS O&M .................................................................................. 17
Chapter 8 OMD006201 GSM Alarm System ........................................................................... 18
Chapter 9 OMD007201 GSM BSC Traffic Statistic ................................................................. 19
Chapter 10 OMD000301 GSM BSC Trouble Shooting ............................................................ 20
Chapter 11 OME100301 GSM BTS Trouble Shooting............................................................. 23
Chapter 12 Appendix A: Training Checklist .......................................................................... 25
Chapter 13 Appendix B: Abbreviations ................................................................................. 26

GSM BSS Engineer Training Trainees Manual ISSUE 3.0
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Confidential Information of Huawei. No Spreading without Permission 1
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) 080308558899
C) 6213008551201 D) 23408030855
7) System information is transmitted in _________
A) Broadcast Channels B) Common Control Channels
C) Dedicated Control Channels D) Traffic Channels
8) Random access information is transmitted in _________
A) Broadcast Channels B) Common Control Channels
C) 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) Diverse
D) Frequency Hopping E) GMSK F) DRX

Confidential Information of Huawei. No Spreading without Permission
2
1.1.4 Brief answer
10) What protocols are used on the interface of Um, A-bis or A in the GSM system?
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.

Chapter 2 OMD001101 GSM BSC Hardware
Structure
System structure of BSC
Understanding the structure of BSC
Understanding the structure of
AM/CM
Understanding the structure of BM
Understanding voice process
Understanding signaling process
Understanding clock system
Understanding loading process
1.2 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

4
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.

Chapter 3 OME201101 GSM BTS312 Hardware
Structure
System structure of BTS312
Knowing the functions and features of BTS
Mastering the BTS hardware structure
Mastering the signal processing ofBTS
1.2 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 18/18/18
C) 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

6
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?

Chapter 4 OMO001101 OMC overview
The functions of OMC system
Knowing the network structure of OMC
Knowing the main functions of OMC
1.2 References
《BSC Routine Operation manual》
4.1.1 Brief answer
(1) Please describe the structure of OMC system.

8
Chapter 5 OMD000203 GSM BSC Auto Data
Configuration
Data Configuration ofBSS
Mastering Initial data configuration
Mastering dynamic data configuration
1.2 References
《Data Configuration Manual》
5.1.1 Judge the following
（1） Auto configuration file autocfg.dat is stored in BAM side under directory
C:OMCBSCBAMdloadcfgdata（）
（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. （）
（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) BAMC:OMCBSCBAMdload
B) BAMC:OMCSHELL
C) BAMC:OMCBSCBAM
D) BAMC:OMCBAMLog
（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

10
（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 started
B) Pure network quality
C) There is no autocfg.dat file in BAM
D) Version mismatch
5.1.4 Multiple choice
（26） It is forbidden to delete or modify the files in C:OMCBSCBAMdload . In
this directory, there are:（）
A) DB_*.DAT for each module
B) cc08.snt、cc08.ctn、cc08.mcm、cc08.mcs、cc08.bsm、FSK.dat
C) The configuration file created by auto data configuration console after transfer
D) 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 order
B) The advanced user can obtain the edit lock authority
C) When a user obtained the edit lock authority, others can only enter data
viewing mode
D) 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?（）
A) Modify cell’s BCC and NCC
B) Modify cell’s property
C) Modify cell’s FH property
D) Modify cell’s CGI
E) Modify cell’s system information
（29） BSC auto data configuration console has ( ) work mode
A) Initial configuration
B) Dynamic configuration
C) Data management
D) 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?

1.4 Laboratory Exercise
5.1.6 Scenario

12
MCC： MNC：
CC： NDC：
BAM IP：
Server IP：
MSISDN：
Site name：
Site type：
MSC
MSC SPC：
BSC SPC：
The number of NO.7：
SLC：
E1 TS occupied by CCS7：
CIC number occupied by CCS7：
CIC number occupied by
TCSM maintenance TS：
E1 number：
E1 position on DDF：
E1 type(75? or 120 ? ）：
E1 using CRC4 or not：
CIC number corresponding with E1：
MSC Period location update time ：
Interface property：
Speech version：
paging mechanism ：LAI？ LAI＋CI？
Authentication & encryption or not：
BSC
BM ?
TCSM number
&location
BSC
AM/CM
E3M ? # ? port
BIE ? # ? port BIE ? # ? port
Site name：
Site type：
Frequency ID
TRX
NO.
CGI
Site
name
Cell name
&cell ID

GSM BSS Engineer Training Trainees Manual ISSUE 3.0 Internal Use
13
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,
withoutPBU
BM2:Site2:GSM900&1800
S3/3/3 (one TRX in 900M,
two TRX in 1800), without
PBU
Site3:O1,BTS3001C,
connectto 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

14
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
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

16
Chapter 6 OMD000201 GSM BSC Maintenance
Console
BSC Daily Maintenance Mastering the operations on BSC maintenance console
1.2 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 BSC
A) 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

Chapter 7 OME001202 GSM BTS O&M
Remote Maintenance
Terminal Maintenance
Mastering the operations on BTS maintenance console
Mastering BTS routine maintenance tasks
1.2 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

18
Chapter 8 OMD006201 GSM Alarm System
BSC Alarm System Structure
Alarm type and Alarm Level
Mastering the operations on Alarm console
1.2 References
8.1.1 Multiple-choice
(1) In Huawei's system, the alarm type is:
A) Fault alarm B) Hardware alarm
C) Event alarm D) Recovery alarm
15) In Huawei's system, the alarm level is:
A) Emergency level B) major level
C) Minor D) warning level
Checking the real-time alarm
Querying the history alarm

Chapter 9 OMD007201 GSM BSC Traffic
Statistic
BSC Traffic Statistic System Structure
Mastering the operation of registering a new task
Checking the results ofthe task
Understanding the usage oftemplate
Solving simple troubles in traffic statistics
1.2 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

20
Chapter 10 OMD000301 GSM BSC Trouble
Shooting
Typical Cases
Knowing how to find faults in BSC
Knowing the common faulttypes
Mastering BSC fault disposal method
1.2 References
《BSS Troubleshooting Manual》
1.4 Troubleshooting Exercise
10.1.1 Requirements and Tips
Note:
Please pay attention to the safety of the equipment.
1.4.1 Troubleshooting Case Report 1
Fault Description
Completion
Criterion
Troubleshooting
Method
Troubleshooting
Process
What is Learned
From the Case

22
Fault Description
Completion
Criterion
Troubleshooting
Method
Troubleshooting
Process
What is Learned
From the Case
Fault Description
Completion
Criterion
Troubleshooting
Method
Troubleshooting
Process
What is Learned
From the Case

Chapter 11 OME100301 GSM BTS Trouble
Shooting
Typical Cases
Knowing how to find faults in BTS
Knowing the common faulttypes
Mastering BTS fault disposal method
1.2 References
《BSS Troubleshooting Manual》
1.4 Troubleshooting Exercise
11.1.1 Requirements and Tips
Note:
Please pay attention to the safety of the equipment.
Fault Description
Completion
Criterion
Troubleshooting
Method
Troubleshooting
Process
What is Learned
From the Case

24

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 □No
3. Add a TRX and correlative board (PSU, CDU, etc.) □Yes □No
4. Add a new site and its adjacent cells □Yes □No
Check Alarm
According 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 □No
3. 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 OMC Can’t□□□□grasp
2. Solve the fault of No.7 link Can’t□□□□grasp
3. Solve the fault of Access Can’t□□□□grasp
4. Solve the fault of Voice Can’t□□□□grasp
BTS troubleshooting
1. Solve the fault of Transmission Can’t□□□□grasp
1. Solve the fault of Antenna & feeder Can’t□□□□grasp

26
Chapter 13 Appendix B: Abbreviations
A
AB Access Burst
AC Access Class (C0 to C15)
Alternating Current
ACCH Associated Control CHannel
ACELP Algebraic code excitation linear prediction
ACU Alternating CurrentUnit
AGCH Access Grant Channel
AI Action Indicator
AM/CM Administration Module/Communication Module
ANSI American National Standard Institute
APL Advanced Phase Locking
ARFCN Absolute Radio Frequency Channel Number
ASIC Application Specific Integrated Circuit
AUC Authentication Centre
B
BA BCCH Allocation
BAM Back Administration Module
BCC BTS Color Code
BCCH BroadcastControl Channel
BCF Base Control Function
BCH Broadcast Channel
BER Bit Error Rate
BFI Bad Frame Indication
BHCA Busy Hour Call Attempts
BIE Base Station Interface Equipment
BITS Building Integrated Timing Supply
BM Basic Module
Bm Full-rate traffic channel
BP BurstPulse
BurstPeriod
BQ Bad Quality
BS Base Station
BSC Base Station Controller
BSIC Base Station Identity Code
BSMU Base Station Interface Unit
BSS Base Station System
BSSAP Base Station System Application Part
BSSMAP Base Station System ManagementApplication Part
BSSOMAP Base Station System Operation and Maintenance Application Part
BTS Base Transceiver Station
BTSM BTS Management
BVC BSSGP Virtual Connection
C
C/R Command/Response field bit
CA Cell Allocation
CAMEL Customized Applications for Mobile network Enhanced Logic
CBA Cell Bar Access
CBC Cell BroadcastCenter
CBCH Cell BroadcastChannel
CBQ Cell Bar Qualify
CC Connection Confirm

Call Control
Country Code
Call Control
CCBS Completion ofCalls to Busy Subscribers
CCCH Common Control Channel
CCH Control Channel
CCS Common Channel Signaling
CD Call Deflection
CDB Cell BroadcastDatabase
CDU Combining and Distribution Unit
CELP Code Excited Linear Prediction
CGI Cell Global Identity
CI Cell Identity
CIC CircuitIdentification Code
CIR Carrier to Interference Ratio
CKSN Ciphering Key Sequence Number
CM Connection Management
CMB Common resource Backplane
CPU Central Processing Unit
CR Connection Request
CRC Cyclic RedundancyCheck
CRO Cell ReselectOffset
CS Coding Scheme
CS-1,2,3,4 Code Scheme-1,2,3,4
CTN Central Switching Network Board
CUI Carrier Unit Interface Controller
D
DB DummyBurst
DBF Database File
DBMS Database ManagementSystem
DC Direct Current
DCCH Dedicated Control Channel
DCL Diagnostic Control Link
DCU Direct CurrentUnit
DDN Digital Data Network
DL Downlink
Data Link (layer)
DLC Data Link Connection
DLCEP Data Link Connection End Point
DLCEPI Data Link Connection End Point Identifier
DLCI Data Link Connection Identifier
Dm Control channel
DNS Domain Name Server
DPC Destination (Signaling) PointCode
DRX Discontinuous reception (mechanism)
DSC Downlink Signaling faultCount
DTAP Direct Transfer Application Part
DTMF Dual Tone Multi Frequency
DTX Discontinuous transmission (mechanism)
E
E3M E3 Sub-Multiplexer
EA Early Allocation
E-Abis Enhanced Abis
EAC External Alarm Collection
EC EmergencyCall
ECSC Early Classmark Sending Control
ECT Explicit Call Transfer
EDU Enhanced Duplexer Unit

28
EFR Enhanced Full Rate speech code
EIR EquipmentIdentify Register
EM Extended Measurement
EST Establishment
ETS European Telecommunication Standard
ETSI European Telecommunications Standards Institute
F
FACCH Fast Associated Control Channel
FACCH/F Fast Associated Control Channel/Full rate
FB Frequency correction Burst
FBC Photoelectric Conversion Board
FBI Optical Fiber Interface Board
FCCH Frequency Correction Channel
FCS Frame Check Sequence
FDMA Frequency Division Multiple Access
FH Frequency Hopping
FIR Finity Impulsion Response
FN Frame Number
FPU Frame Processing Unit
FR Frame Relay
Full Rate
FTC Full Rate Transcoder
FTP File Transfer Protocol
FU Frame Unit
FUC Frame Unit Controller
FUL Radio Signaling Link
G
G-Abis GPRS Abis
GALM Alarm board
GCKS Clock source
GCTN Central switching Network board
GEMA EmergencyAction board
GFBI Fiber Interface board
GGSN Gateway GPRS SupportNode
GLAP LAPD Protocol Process board
GMC2 Inter-Module Communication board
GMCC Module Communication and Control board
GMEM Memory board
GMM GPRS Mobility Management
GMPU Main Process Unit
GMSC Gateway Mobile Switching Center
GMSK Gaussian Minimum ShiftKeying (modulation)
GNET Switching Network board
GNOD Node Communication Board
GOPT Local Optical Interface Board
GPRS General Packet Radio Service
GPS Global Position System
GSM
GSM900
GSM1800
Global System for Mobile communications
GSN GPRS Support Node
GSNT GSM Signaling Switching Network Board
GT Global Title
H
HCS Hierarchical Cell Structure
HDLC High level Data Link Control
HDSL High speed Digital Subscriber Line
HLR Home Location Register

HO Handover
HPA High magnification Power Amplifier board
HSC Hot Swap Controller
HSN Hopping Sequence Number
HW Highway
I
ID Identification/IDentity
IE (signaling) information element
IEC International Electrotechnical Commission
IF Information frames
IMEI International Mobile station EquipmentIdentity
IMSI International Mobile Subscriber Identity
IND Indication
IOMU iSite Operation and Maintenance Unit
IP Internet Protocol
ISDN Integrated Services Digital Network
ISUP Integrated Services Digital Network User Part/ISDN User Part
ITU-T
International Telecommunication Union - Telecommunication Standardization
Sector
IWF Interworking Function
L
L1 Layer 1
L2 Layer 2
L2ML Layer 2 ManagementLink
L3 Layer 3
LA Location Area
LAC Location Area Code
LAI Location Area Identity
LAPB Link Access Protocol Balanced
LAPD Link Access Protocol on the D channel
LAPDm Link Access Protocol on the Dm channel
LLC Logical Link Control
Lm Half rate traffic channel
LMT Local Maintenance Terminal
LNA Low Noise Amplifier
LPN7 Common Channel Signaling Processing Board
M
MA Mobile Allocation
MAC Media Access Control
MACN Mobile Allocation Channel Number
MAI Mobile Allocation Index
MAIO Mobile Allocation Index Offset
MAP Mobile Application Part
MBR Multiband Report
MCC Mobile Country Code
MCK Main Clock board
MDC Message Discrimination
MDSL Medium Bit-rate Digital Subscriber Loop
MDT Message Distribution
ME Mobile Equipment
MFU Microcell Frame Unit
MM Mobility Management
MMI Man Machine Interface
MMU Multiplication and ManagementUnit
MNC Mobile Network Code
MNS Mobile Network Signaling
MPH Managemententity - Physical layer [primitive]
MR MeasurementResult

30
MRP Multiple Reuse Pattern
MRT Message Routing
MS Mobile Station
MSC Mobile-services Switching Centre,Mobile Switching Centre
MSISDN Mobile Station International ISDN Number
MSM MSC Subrate channel Multiplexer
MT Mobile Terminal
MTP Message Transfer Part
N
NB Normal Burst
NC Network Control
NCC Network Color Code
NCH Notification Channel
NM Network Management
NS Network Service
NSE Network Service Entity
NSS Network Sub System
O
O&M, OM Operations & Maintenance
OAM Operation Administration and Maintenance
OCXO Oven voltage Control Oscillator
OM Operation and Maintenance
OMC Operations & Maintenance Centre
OML Operations & Maintenance Link
OMU Operation and Maintenance Unit
OPC Originating PointCode
OSI Open Systems Interconnection
OSI RM OSI Reference Model
P
PACCH Packet Associated Control Channel
PAD Packet Assembly/Disassemblyfacility
PAGCH Packet Access Grant Channel
PAU Power Amplifier Unit
Pb Pb Interface
PBCCH Packet BroadcastControl Channel
PBGT Power Budget
PbSL PCU-BSC Signaling Link
PBU Power Booster Unit
PCCCH Packet Common Control Channel
PCH Paging Channel
PCIC Packet CircuitIdentity Code
PCM Pulse Code Modulation
PCU Packet Control Unit
PD Protocol Discrimination
PDCH Packet Data Channel
PDH Plesiochronous Digital Hierarchy
PDP Packet Data Protocol
PDTCH Packet Data Traffic Channel
PH Physical (layer)
PIN Personal Identity Number
PLMN Public Land Mobile Network
PMU Power and EnvironmentMonitoring Unit
PNCH Packet Notification Channel
POMU Packet Operation & Maintenance Unit
PON Passive Optical Network
PP Point-to-Point
PPCH Packet Paging Channel
PRACH Packet Random Access Channel

PSI Packet System Information
PSK Phase Shift Keying
PSTN Public Switched Telephone Network
PSU Power Supply Unit
PT Penalty Time
PTCCH Packet Timing advanced Control Channel
PTM-M Point To Multipoint Multicast
PTP Point To Point
PWC Secondary Power Supply Board
Q
QoS Quality of Service
R
RACH Random Access Channel
RBER Residual BitError Ratio
RCU Receiver Unit
RE Reestablishment
RF Radio Frequency
RFN Reduced TDMA Frame Number
RIL3 Radio Interface Layer 3
RLC Radio Link Control
RNTABLE Table of 128 integers in the hopping sequence
RPE-LTP Regular Pulse Excitation-Long Term Prediction
RPPU Radio Packet Process Unit
RPU Radio frequency Process Unit
RR Radio Resource management
RSL Radio Signaling Link
RSM(RR') Radio Sub-system Management
RXLEV Received signal level
RXQUAL Received Signal Quality
S
SABM Set Asynchronous Balanced Mode
SACCH Slow Associated Control Channel
SACCH/C4 Slow Associated Control CHannel/SDCCH/4
SACCH/C8 Slow Associated Control CHannel/SDCCH/8
SACCH/T Slow Associated Control CHannel/Traffic channel
SACCH/TF Slow Associated Control CHannel/Traffic channel Full rate
SAP Service Access Point
SAPI Service Access Point Identifier
SB Synchronization Burst
SCCP Signaling Connection Control Part
SCH Synchronization Channel
SCMG SCCP Management
SCN Sub-Channel Number
SCU Simple combining Unit
SDCCH Stand-alone Dedicated Control Channel
SDH Synchronous Digital Hierarchy
SDU Service Data Unit
SFH Slow Frequency Hopping
SGSN Serving GPRS Support Node
SID Silence Descriptor
SIG Signaling
SIM Subscriber Identity Module
SITE Site
SLM Signaling Link Management
SLS Signaling Link Selection
SM Sub-Multiplexer Interface
SMBCB Short Message Service Cell Broadcast
SMC Short Message Center

32
SMI Sub-Multiplexer Interface
SMS Short Message Service
SMSCB Short Message Service Cell Broadcast
SMUX Sub-Multiplexer
SOR SupportOptimization Routing
SP Signaling Point
SRM Signaling Route Management
SS SupplementaryService
SS7 Signaling System Number 7
SSN SubSystem Number
STM Signaling Traffic Management
STP Signaling Transfer Point
STU Site Test Unit(board)
T
TA Timing Advance
TAI Timing Advance Index
TBF TemporaryBlock Flow
TBU Transceiver Baseband Unit
TC Transcoder
TCH Traffic Channel
TCH/F A full rate TCH
TCH/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 TCH
TCSM Transcoder and Sub-Multiplexer
TDMA Time Division Multiple Access
TDP Transmitter Driver and PLL
TDU Timing Distribution Unit
TE Terminal Equipment
TEI Terminal EquipmentIdentifier
TES Transmission Extension power Supplyunit
TEU Transmission Extension Unit
TFI TransportFormatIndicator
TFO Tandem Free Operation
TI Transaction Identifier
TLLI TemporaryLink Level Identity
TMSC Tandem Mobile Switching Centre
TMSI TemporaryMobile Subscriber Identity
TMU Timing/Transmission and ManagementUnit
TN TimeslotNumber
TO TemporaryOffset
TRAU Transcoder & Rate Adaptation Unit
TRB Transceiver Backplane
TRX Transceiver
TS Time Slot
Technical Specification
TSC Training Sequence Code
TUP Telephone User Part
U
UA Unnumbered Acknowledge
UDT Unit Data
UI Unnumbered Information (frame)
USF Uplink State Flag
USSD Unstructured SupplementaryService Data
V
VAD Voice Activity Detection
VBS Voice BroadcastService

VEA Very Early Allocation
VGCS Voice Group Call Service
VLR Visitor Location Register
VM Voice Mailbox
VSAT Very Small Aperture Terminal
VSWR Voltage Standing Wave Radio
W
WS Workstation
X
xDSL x Digital Subscriber Line
Z
ZCS Zero CurrentSwitch
ZVS Zero Voltage Switch

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