09.133GPPSignalling interworking between ISDN supplementary services Application Service Element (ASE) and Mobile Application Part (MAP) protocolsTS
For the purposes of this specification, the following definitions apply:
SSAP: Supplementary Service Application Part. SSAP is the protocol used for CCBS procedures on the interface between the originating and destination network. Communication across this interface is performed using SCCP Connectionless Signalling (Refer to ETS 300 358). The terms CCBS-ASE defined in ETS 300 356-18 for the ISDN CCBS service and SSAP defined in GSM 03.93 are the same and are used interchangeably in this specification. The SSAP interface is between the originating network entities (HLR A, OLE) and the destination network entities (HLR B, DLE).
Abbreviations used in this specification are listed in GSM 01.04.
For the purposes of this specification, the following abbreviations apply:
ASE Application Service Element
CCBS Call Completion to Busy Subscriber
DLE Destination Local Exchange
ISDN Integrated Services Digital Network
MAP Mobile Application Part
OLE Originating Local Exchange
SCCP Signalling Connection Control Part
SSAP Supplementary Service Application Part
TC Transaction Capabilities