3 Definitions and abbreviations

29.2023GPPRelease 17Signalling System No. 7 (SS7) signalling transport in core networkStage 3TS

3.1 Definitions

For the purposes of the present document, the terms and definitions given in TR 21.905 [1] and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905 [1].

(no further terms defined)

3.2 Abbreviations

For the purposes of the present document, the abbreviations given in TR 21.905 [1] and the following apply. An abbreviation defined in the present document takes precedence over the definition of the same abbreviation, if any, in TR 21.905 [1].

AAL5 ATM Adaptation Layer type 5

ATM Asynchronous Transfer Mode

IP Internet Protocol

MTP Message Transfer Part

MTP1 Message Transfer Part layer 1

MTP2 Message Transfer Part layer 2

MTP3 Message Transfer Part layer 3

M2PA Message Transfer Part 2 -User Peer-to-Peer Adaptation Layer

M3UA MTP3-User Adaptation

PDH Plesiochronous Digital Hierarchy

SSCF Service Specific Coordination Function

SSCOP Service Specific Connection Oriented Protocol

SCCP Signalling Connection Control Part

SCTP Stream Control Transmission Protocol

SDH Synchronous Digital Hierarchy

TCAP Transaction Capabilities Application Part