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NMS Network Management Subsystem
NNI Network-Node Interface
NRT Non-Real Time
NSAP Network Service Access Point
NSAPI Network Service Access Point Identi¬er
NSS Network Sub System
NT Network Termination
O&M Operations & Maintenance
OAM Operations Administration and Maintenance
636 GLOSSARY OF TERMS


OSI Open System Interconnection
OSPF Open Shortest Path First
OUI Organizationally Unique Identi¬er
OVSF Orthogonal Variable Spreading Factor
PABX Private Automatic Branch eXchange
PACCH Packet Associated Control Channel
PAD Packet Assembler/Disassembler
PAD Packet Assembler and Disassembler
PAGCH Packet Access Grant Channel
PAP Password Authentication Protocol
PBCCH Packet Broadcast Control Channel
PBX Private Branch eXchange
PC Power Control
PCCCH Packet Common Control Channel
PCCH Paging Control Channel
P-CCPCH Primary Common Control Physical Channel
PCH Paging Channel
PCM Pulse Code Modulation
PCPCH Physical Common Packet Channel
P-CPICH Primary Common Pilot Channel
PCR Peak Cell Rate
PCS Personal Communication System
PCU Packet Control Unit
PD Protocol Discriminator
PDCH Packet Data Channel
PDCP Packet Data Convergence Protocol
PDH Plesiochronous Digital Hierarchy
PDN Packet Data Network
PDP Packet Data Protocol
PDSCH Physical Downlink Shared Channel
PDTCH Packet Data Traf¬c Channel
PDU Protocol Data Unit
PHS Personal Handyphone System
PHY Physical layer
PhyCH Physical Channel
PI Page Indicator
PICH Page Indicator Channel
PIN Personal Identi¬cation Number
PLMN Public Land Mobile Network
PMD Physical Media Dependent
PN Pseudo Noise
PNNI Private Network-Network Interface
POTS Plain Old Telephony Service
PP Point-to-Point
PPCH Packet Paging Channel
GLOSSARY OF TERMS 637


PPP Point-to-Point Protocol
PRACH Physical Random Access Channel
PRI Primary Rate Interface
PS Packet Switched
PSC Primary Synchronization Code
PSCH Physical Shared Channel
PSPDN Packet Switched Public Data Network
PSTN Public Switched Telephone Network
PTCCH Packet Timing advance Control Channel
PTI Payload Type Indicator
PTM Point-to-Multipoint
P-TMSI Packet TMSI
PTP Point to point
PU Payload Unit
PUSCH Physical Uplink Shared Channel
PVC Permanent Virtual Circuit
PVCC Permanent Virtual Channel Connection
QoS Quality of Service
QPSK Quadrature (Quaternary) Phase Shift Keying
R4 Release 4
R5 Release 5
R99 Release 1999
RA Routing Area
RAB Radio Access Bearer
RAC Routing Area Code
RACH Random Access Channel
RADIUS Remote Authentication Dial In User Service
RADIUS Remote Authentication Dial-In User Service
RAI Routing Area Identity
RAN Radio Access Network
RANAP Radio Access Network Application Part
RAND RANDom number (used for authentication)
RAT Radio Access Technology
RAU Routing Area Update
RB Radio Bearer
RBER Residual Bit Error Ratio
RDF Resource Description Format
RED Random Early Detect
REJ REJect(ion)
REL RELease
Rel-4 Release 4
Rel-5 Release 5
REQ REQuest
RF Radio Frequency
RFC Request For Comments
638 GLOSSARY OF TERMS


RFCH Radio Frequency CHannel
RFN Reduced TDMA Frame Number
RIP Routing Information Protocol
RL Radio Link
RLC Radio Link Control
RLCP Radio Link Control Protocol
RLP Radio Link Protocol
RM Resource Management
RNC Radio Network Controller
RNS Radio Network Subsystem
RNSAP Radio Network Subsystem Application Part
RNTI Radio Network Temporary Identity
RPLMN Registered Public Land Mobile Network
RR Radio Resources
RRC Radio Resource Control
RRM Radio Resource Management
RSCP Received Signal Code Power
R-SGW Roaming Signalling Gateway
RSSI Received Signal Strength Indicator
RST Reset
RSVP Resource Reservation Protocol
RSVP Resource ReserVation Protocol
RT Real Time
RTCP Real Time Control Protocol
RTE Remote Terminal Emulator
RTP Real Time Protocol
RU Resource Unit
RX Receive
RXLEV Received signal level
RXQUAL Received Signal Quality
SAAL Signalling ATM Adaptation Layer
SABM Set Asynchronous Balanced Mode
SACCH Slow Associated Control Channel
SAP Service Access Point
SAPI Service Access Point Identi¬er
SAR Segmentation and Reassembly
SAT SIM Application Toolkit
SB Synchronization Burst
SBSC Serving Base Station Controller
SBSS Serving Base Station Subsystem
SC Service Centre (used for SMS)
SCCH Synchronization Control Channel
SCCP Signalling Connection Control Part
S-CCPCH Secondary Common Control Physical Channel
SCH Synchronization Channel
GLOSSARY OF TERMS 639


SCN Sub-Channel Number
SCP Service Control Point
S-CPICH Secondary Common Pilot Channel
SCR Sustainable Cell Rate
S-CSCF Serving CSCF
SCTP Streaming Control Transport Protocol
SDCCH Stand-Alone Dedicated Control Channel
SDES Source Descriptor
SDH Synchronous Digital Hierarchy
SDT Structured Data Transfer
SDU Service Data Unit
SEAL Simple and Ef¬cient Adaptation Layer
SF Spreading Factor
SFH Slow Frequency Hopping
SFN System Frame Number
SGSN Serving GPRS Support Node
SHCCH Shared Channel Control Channel
SID SIlence Descriptor
SIM GSM Subscriber Identity Module
SIP Session Initiation Protocol
SIR Signal-to-Interference Ratio
SLA Service Level Agreement
SLIP Serial Line Interface Protocol
SM Session Management
SMDS Switched Multimegabit Data Service
SMS Short Message Service
SMS/PP Short Message Service/Point-to-Point
SMS-CB SMS Cell Broadcast
SMS-SC Short Message Service - Service Centre
SN Serving Network
SN Sequence Number
SNDCP Sub-Network Dependent Convergence Protocol
SNMP Simple Network Management Protocol
SONET Synchronous Optical Network
SPC Signalling Point Code
SQN Sequence number
SRB Signalling Radio Bearer
SRES Signed RESponse (authentication)
SRNC Serving Radio Network Controller
SRNS Serving RNS
S-RNTI SRNC Radio Network Temporary Identity
SS7 Signalling System No. 7
SSCF Service Speci¬c Co-ordination Function
SSCF-NNI Service Speci¬c Coordination Function “ Network Node Interface
SSCOP Service Speci¬c Connection Oriented Protocol
640 GLOSSARY OF TERMS


SSCS Service Speci¬c Convergence Sublayer
SSDT Site Selection Diversity Transmission
SSN Sub-System Number
SSSAR Service Speci¬c Segmentation and Re-assembly sublayer
STC Signalling Transport Converter
STP Signalling Transfer Point
STTD Space Time Transmit Diversity
SVC Switched Virtual Circuit
SVCC Switched Virtual Circuit Connection
T Transparent
TA Timing Advance
TBF Temporary Block Flow
TBR Technical Basis for Regulation
TC TransCoder
TC Transmission Convergence
TCH Traf¬c Channel
TCP Transmission Control Protocol
TDD Time Division Duplex
TDM Time Division Multiplexing
TDMA Time Division Multiple Access
TD-SCDMA Time Division-Synchronous Code Division Multiple Access
TE Terminal Equipment
TEID Tunnel End Point Identi¬er
TF Transport Format
TFC Transport Format Combination
TFCI Transport Format Combination Indicator
TFCS Transport Format Combination Set
TFI Transport Format Indicator
TFI Temporary Flow Identity
TFS Transport Format Set
TFT Traf¬c Flow Template
TLLI Temporary Logical Link Identity
TLS Transport Layer Security
TLV Tag Length Value
TM Telecom Management
TM Traf¬c Management
TMSI Temporary Mobile Subscriber Identity
TOA Time of Arrival
TPC Transmit Power Control
TPDU Transfer Protocol Data Unit
TR Technical Report
TRAU Transcoder and Rate Adapter Unit
TrCH Transport Channel
TRX Transceiver
TS Technical Speci¬cation
GLOSSARY OF TERMS 641


TS Time Slot
TSC Training Sequence Code
TSG Technical Speci¬cation Group
TTI Transmission Timing Interval
TUP Telephone User Part (SS7)
TX Transmit
UARFCN UTRA Absolute Radio Frequency Channel Number
UARFN UTRA Absolute Radio Frequency Number
UART Universal Asynchronous Receiver and Transmitter
UBR Unspeci¬ed Bit Rate
UDP User Datagram Protocol
UE User Equipment
UI User Interface
UIC Union Internationale des Chemins de Fer
UICC Universal Integrated Circuit Card
UL Uplink (Reverse Link)
UM Unacknowledged Mode
UMTS Universal Mobile Telecommunications System

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