3 Definitions and abbreviations

23.0873GPPRelease 17Stage 2TSUser-to-User Signalling (UUS) supplementary service

3.1 Definitions

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

Burst parameter: parameter indicating the absolute maximum number of UUS 3 service related user information messages that can be sent at intervals indicated by the value of timer T2-UUS3

Remote network: network of the remote subscriber

Remote subscriber: for service 1 and 2 the remote subscriber is the called party of a call to which the served subscriber activates the UUS supplementary service. For service 3 the remote subscriber can be either the called or the calling party of an established call to whom the use of the UUS supplementary service is requested by the served subscriber

Served subscriber: subscriber who has a provision of the UUS supplementary service and who activates the UUS supplementary service. For service 1 and 2 the served subscriber is always the calling subscriber, for service 3 either the calling or the called subscriber can be the served subscriber

Serving network: network of the served subscriber

User-to-User Information (UUI): information transferred by using the UUS supplementary service

UUS Service: UUS services (Service 1, 2 and 3) are components of the UUS supplementary service. If the UUS supplementary service is provided to a subscriber, he can handle the UUS services independently within a call

3.2 Abbreviations

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

ACM Address Complete Message

ANM ANswer Message

CON CONnect

CPG Call ProGress

IAM Initial Address Message

MS Mobile Station

REL RELease

SIFOC Send Info For Outgoing Call

SRI Send Routing Info

UUI User-to-User Information

UUS User-to-User Signalling

UUS1 User-to-User Signalling Service 1

UUS2 User-to-User Signalling Service 2

UUS3 User-to-User Signalling Service 3

Further GSM related abbreviations are listed in GSM 01.04.