3 Definitions and abbreviations

04.873GPPStage 3TSUser-to-User Signalling (UUS) supplementary service

3.1 Definitions

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

Remote party: For service 1 and 2 the remote party is the called party of a call to which the served subscriber activates the UUS supplementary service. For service 3 the remote party 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: The 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.

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

UUS not required: If the "UUS not required" indication is given by the subscriber, the call will be completed even if UUI cannot be passed to the called subscriber.

UUS required: If the "UUS required" indication is given by the subscriber, the call shall not be completed if UUI cannot be passed to the called subscriber.

UUS Service: The 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:

MS A Mobile Station A, the mobile station of the served subscriber

MS B Mobile Station B, the mobile station of the remote subscriber

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.