For the purposes of the present document, the terms and definitions given in TR 21.905
and the following apply. A term defined in the present document takes precedence over the definition of the same term, if any, in TR 21.905
Customized Alerting Tone:
An indication that is played to the calling party during establishment of a call or during an established call session indicating one of the following:
that the called subscriber is being alerted.
the progress of communication request (Call Forward, Call Wait etc.)
any alerting event during a call session
An Alerting Tone that is customized by the called subscriber or the calling subscriber, and it can contain additional media types.
Customized Alerting Tone Service:
A Customized Alerting Tone Service (CAT service) is an operator specific service by which an operator enables the subscriber to customize his alerting tone.
is the interaction of the CAT service with other services, e.g. CAT Inter-action with Call Forwarding.
CAT Inter-working :
Multiple Domains Inter-working is the interworking of a CAT service over different domains or subsystems (CS or IMS) as well as between PLMNs.
CAT content provider:
A service provider that provides a set of Alerting Tones for use as CAT for subscribers of the CAT service. A 3GPP operator may be a CAT content provider.