3 Abbreviations

25.4123GPPRelease 17TSUTRAN Iu interface signalling transport

For the purposes of the present document, the following abbreviations apply:

AAL ATM Adaptation Layer

AAL2 ATM Adaptation Layer 2

AAL5 ATM Adaptation Layer 5

ATM Asynchronous Transfer Mode

CS Circuit Switched

DiffServ Differentiated Services

HDLC High Level Data Link Control

IP Internet Protocol

M3UA SS7 MTP3 User Adaptation Layer

ML/MC-PPP Muti-Link/Multi-Class PPP

MPLS Multiprotocol Label Switching

MSC Mobile services Switching Center

MTP3-B Message Transfer Part

PPP Point-to-Point protocol

PPPMux PPP Multiplexing

PS Packet Switched

RANAP Radio Access Network Application Part

RNC Radio Network Controller

SAAL-NNI Signalling ATM Adaptation Layer – Network Node Interface

SCCP Signalling Connection Control Part

SCTP Stream Control Transmission Protocol

SGSN Serving GPRS Support Node

SSCF Service Specific Co-ordination Function

SSCOP Service Specific Connection Oriented Protocol