3 Definitions and abbreviations

09.123GPPApplication of ISDN User Part (ISUP) Version 2 for the Integrated Services Digital Network (ISDN) - Public Land Mobile Network (PLMN) signalling interfacePart 1: Protocol specificationTS

3.1 Definitions

For the purposes of this ETS, the following definitions apply:

Gateway: The exchange which switches the call to or from another network.

Gateway Mobile-service Switching Centre (GMSC): GMSC is an exchange with the functional entity which performs interrogation to the Home Location Register (HLR).

International gateway: The exchange (at the end of an international circuit) which switches a call destined to or originating from another country.

Public Land Mobile Network (PLMN): PLMN is in this ETS referring to the GSM network.

3.2 Abbreviations

For the purposes of this ETS, the following abbreviations apply:

3PTY Three-Party

ACM Address Complete Message

AoC Advice of Charge

CB Call Barring

CCBS Completion of Calls to Busy Subscriber

CD Call Deflection

CFB Call Forwarding Busy

CFNR Call Forwarding No Reply

CFNRc Call Forwarding on Mobile Subscriber Not Reachable

CFU Call Forwarding Unconditional

CLIP Calling Line Identification Presentation

CLIR Calling Line Identification Restriction

COLP Connected Line Identification Presentation

COLR Connected Line Identification Restriction

CONF Conference calling

CPG Call Progress message

CUG Closed User Group

CW Call Waiting

DDI Direct Dialling In

ECT Explicit Call Transfer

GMSC Gateway MSC

GSM Global System for Mobile communications

HLC High Layer Compatibility

HLR Home Location Register

HOLD Call Hold

HPLMN Home Public Land Mobile Network

IAM Initial Address Message

ISDN Integrated Services Digital Network

ISUP ISDN User Part

MAP Mobile Application Part

MCID Malicious Call Identification

MPTY MultiParty

MS Mobile Station

MSC Mobile-service Switching Centre

MSISDN Mobile Station ISDN number

MSN Multiple Subscriber Number

MSRN Mobile Station Roaming Number

MTP Message Transfer Part

NI Network Indicator

PLMN Public Land Mobile Network

SUB Subaddressing

TP Terminal Portability

USSD Unstructured Supplementary Service Data

UUS User-to-User Signalling

UUS1 UUS service 1

UUS2 UUS service 2

UUS3 UUS service 3

VLR Visitor Location Register

VMSC Visited MSC