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CS Circuit Switched
CS Convergence Sublayer
CSCF Call Server Control Function
CSD Circuit Switched Data
CSE Camel Service Environment
CS-GW Circuit Switched Gateway
CSPDN Circuit Switched Public Data Network
CTCH Common Traf¬c Channel
CTD Cell Transfer Delay
CTS Cordless Telephony System
DAC Digital to Analog Converter
DCA Dynamic Channel Allocation
DCC Data Country Code
DCCH Dedicated Control Channel
DCE Data Circuit terminating Equipment
DCH Dedicated Channel
DCN Data Communication Network
DCS1800 Digital Cellular Network at 1800 MHz
DECT Digital Enhanced Cordless Telecommunications
DHCP Dynamic Host Con¬guration Protocol
DHCP Dynamic Host Con¬guration Protocol
diff-serv Differentiated services
DL Downlink (Forward Link)
DLCI Data Link Connection Identi¬er
Dm Control channel (ISDN terminology applied to mobile service)
DMR Digital Mobile Radio
DNS Domain Name Service
DPCCH Dedicated Physical Control Channel
DPCH Dedicated Physical Channel
DPDCH Dedicated Physical Data Channel
DRAC Dynamic Resource Allocation Control
DRNC Drift Radio Network Controller
DRNS Drift RNS
DRX Discontinuous Reception
DS-CDMA Direct-Sequence Code Division Multiple Access
DSCH Downlink Shared Channel
DTAP Direct Transfer Application Part
DTCH Dedicated Traf¬c Channel
DTE Data Terminal Equipment
GLOSSARY OF TERMS 631


DTL Designated Transit List
DTMF Dual Tone Multiple Frequency
DTX Discontinuous Transmission
DXI Data Exchange Interface
EA External Alarms
Ec/No Ratio of energy per modulating bit to the noise spectral density
ECSD Enhanced CSD
EDGE Enhanced Data rates for Global/GSM Evolution
EFCI Explicit Forward Congestion Indication
EFR Enhanced Full Rate
E-GGSN Enhanced GGSN
EGPRS Enhanced GPRS
E-HLR Enhanced HLR
EIC Equipment Identity Centre
EIR Equipment Identity Register
ELAN Emulated Local Area Network
EMC ElectroMagnetic Compatibility
EMI Electromagnetic Interference
EOM End of Message
ESP Encapsulating Security Payload
ETR ETSI Technical Report
ETS European Telecommunication Standard
ETSI European Telecommunications Standards Institute
FACCH Fast Associated Control CHannel
FACCH/F Fast Associated Control Channel/Full rate
FACCH/H Fast Associated Control Channel/Half rate
FACH Forward Access Channel
FAUSCH Fast Uplink Signalling Channel
FAX Facsimile
FB Frequency correction Burst
FBI Feedback Information
FC Feedback Control
FCCH Frequency Correction CHannel
FCS Frame Check Sequence
FDD Frequency Division Duplex
FDDI Fiber Distributed Data Interface
FDM Frequency Division Multiplex
FDMA Frequency Division Multiple Access
FEC Forward Error Correction
FEC Forwarding Equivalence Class
FER Frame Erasure Rate, Frame Error Rate
FFS For Further Study
FH Frequency Hopping
FM Fault Management
FN Frame Number
632 GLOSSARY OF TERMS


FP Frame Protocol
FR Full Rate
FR Frame-Relay
FTP File Transfer Protocol
GCAC Generic Connection Admission Control
GCRA Generic Cell Rate Algorithm
GERAN GSM/EDGE Radio Access Network
GFC Generic Flow Control
GGSN Gateway GPRS Support Node
GMM GPRS Mobility Management
GMSC Gateway MSC
GMSK Gaussian Minimum Shift Keying
GPRS General Packet Radio Service
GRA GERAN Registration Area
G-RNTI GERAN Radio Network Temporary Identity
GSIM GSM Service Identity Module
GSM Global System for Mobile communications
GSN GPRS Support Nodes
GT Global Title
GTP GPRS Tunneling Protocol
GTP-U GPRS Tunnelling Protocol for User Plane
GTT Global Text Telephony
HCS Hierarchical Cell Structure
H-CSCF Home CSCF
HDLC High Level Data Link Control
HEC Header Error Control
HFN HyperFrame Number
HHO Hard Handover
HLR Home Location Register
HN Home Network
HO Handover
HPLMN Home Public Land Mobile Network
HPS Handover Path Switching
HR Half Rate
HSCSD High Speed Circuit Switched Data
HSS Home Subscriber Server
HTTP Hyper Text Transfer Protocol
HTTPS Hyper Text Transfer Protocol Secure
I/O Input/Output
IAM Initial Address Message
ICC Integrated Circuit Card
ICD International Code Designator
ICGW Incoming Call Gateway
ICM In-Call Modi¬cation
ICMP Internet Control Message Protocol
GLOSSARY OF TERMS 633


ID Identi¬er
IDN Integrated Digital Network
IE Information Element
IEC International Electrotechnical Commission
IEEE Institute of Electrical and Electronics Engineers
IEI Information Element Identi¬er
IETF Internet Engineering Task Force
IGRP Interior Gateway Routing Protocol
IK Integrity key
ILMI Interim Link Management
IMA Inverse Multiplexing on ATM
IMEI International Mobile Equipment Identity
IMS IP Multimedia Subsystem
IMSI International Mobile Subscriber Identity
IMT-2000 International Mobile Telecommunications 2000
IN Intelligent Network
INAP Intelligent Network Application Part
IP Internet Protocol
IPBCP IP Bearer Control Protocol
IP-M IP Multicast
IPv4 Internet Protocol Version 4
IPv6 Internet Protocol Version 6
IPX Novell Internetwork Packet Exchange
IR Infrared
ISDN Integrated Services Digital Network
ISO International Organisation for Standardisation
ISP Internet Service Provider
ISUP ISDN User Part
ITU International Telecommunication Union
ITU-T International Telecommunications Union Telecommunications
IWF InterWorking Function
IWMSC InterWorking MSC
IWU Inter Working Unit
JAR ¬le Java Archive File
JPEG Joint Photographic Experts Group
k Windows size
K Constraint length of the convolutional code
kbps kilo-bits per second
Kc Ciphering key
Ki Individual subscriber authentication key
ksps kilo-symbols per second
L1 Layer 1 (physical layer)
L2 Layer 2 (data link layer)
L3 Layer 3 (network layer)
LA Location Area
634 GLOSSARY OF TERMS


LAC Location Area Code
LAI Location Area Identity
LAN Local Area Network
LANE LAN Emulation
LAPB Link Access Protocol Balanced
LAPD Link Access Procedure D
LAPDm Link Access Protocol on the Dm channel
LAU Location Area Update
LB Leaky Bucket
LCP Link Control Protocol
LCS Location Services
LE Local Exchange
LE LAN Emulation
LEC LAN Emulation Client
LECS LAN Emulation Con¬guration Server
LEN LENgth
LES LAN Emulation Server
LI Length Indicator
LIB Label Information Base
LIPE Lightweight IP Encapsulation
LLC Logical Link Control
LNS L2TP Network Server
LPLMN Local PLMN
LR Location Register
LSB Least Signi¬cant Bit
LSP Link State Protocol
LSR Label Switched Router
LU Location Update
MA Multiple Access
MAC Medium Access Control
MAC Message Authentication Code
MAP Mobile Application Part
MBS Maximum Burst Size
MCC Mobile Country Code
MCDV Maximum Cell Delay Variance
MCLR Maximum Cell Loss Ratio
Mcps Mega-chips per second
MCR Minimum Cell Rate
MCS Modulation and Coding Scheme
MCTD Maximum Cell Transfer Delay
MCU Media Control Unit
ME Mobile Equipment
MEGACO Media Gateway Control Protocol
MEHO Mobile evaluated handover
MExE Mobile Execution Environment
GLOSSARY OF TERMS 635


MF MultiFrame
MGCF Media Gateway Control Function
MGCP Media Gateway Control Part
MGCP Media Gateway Control Protocol
MGW Media GateWay
MIB Management Information Base
MIP Mobile IP
MM Mobility Management
MMI Man Machine Interface
MNC Mobile Network Code
MNP Mobile Number Portability
MO Mobile Originated
MOHO Mobile Originated Handover
MOS Mean Opinion Score
MPEG Moving Pictures Experts Group
MPLS Multiprotocol Label Switching
MPOA Multiprotocol over ATM
MRF Media Resource Function
MS Mobile Station
MSB Most Signi¬cant Bit
MSC Mobile Switching Centre
MSCS MSC Server
MSID Mobile Station Identi¬er
MSIN Mobile Station Identi¬cation Number
MSISDN Mobile Subscriber ISDN Number
MSRN Mobile Station Roaming Number
MT Mobile Terminated
MTP Message Transfer Part
MTP3-B Message Transfer Part level 3
MTU Maximum Transfer Unit
MVNO Mobile Virtual Network Operator
NAS Non-Access Stratum
NBAP Node B Application Part
NE Network Element
NEHO Network evaluated handover
NM Network Manager

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