3 Definitions and abbreviations

23.0353GPPImmediate Service Termination (IST)Release 17Stage 2TS

3.1 Definitions

For the purposes of the present document, the following terms and definitions apply.

Subscriber activities: subscriber activities that must be terminated. These can be call related events (e.g. call set-up, call termination) or the invocation of call related and call independent supplementary services (e.g. Call Hold, Call Waiting, Call Transfer, Call Forwarding, Unstructured Supplementary Service Data (USSD)).

3.2 Abbreviations

For the purposes of the present document, the abbreviations given in TR 21.905 [1] and the following abbreviations apply:

IST Immediate Service Termination

FDS Fraud Detection System

FIGS Fraud Information Gathering System

MO Mobile Originated

MT Mobile Terminated

O-CSI Originating CAMEL Subscription Information

T-CSI Terminating CAMEL Subscription Information