1 Scope
2 References
3 Definitions
3.1 Terms defined elsewhere
3.2 Terms defined in this Recommendation
4 Abbreviations and acronyms
5 CRT service and architecture
5.1 General description
5.2 General architecture
5.3 Possible CRT service architectures
6 Service models
7 Media formats
7.1 Audio
7.2 Video
7.3 Text
7.4 Still image
8 Signalling requirements
8.1 Requirements for the terminating UE
8.2 Requirements for the terminating P-CSC-FE
8.3 Requirements for the I-CSC-FE
8.4 Requirements for the S-CSC-FE
8.5 Requirements for the IBC-FE
8.6 Requirements for the call server
8.7 Requirements for the AS-FE
9 Protocol profiles
9.1 IMS-based CRT service
9.2 Call-server based CRT service
10 Interactions between networks
10.1 Providing circuit switched network CRT to the terminating UE in
the NGN domain
10.2 Providing NGN CRT to the called party in the circuit switched
network domain
11 Interactions with other services on NGN
11.1 Originating identification presentation (OIP)
11.2 Originating identification restriction (OIR)
11.3 Terminating identification presentation (TIP)
11.4 Terminating identification restriction (TIR)
11.5 Communication HOLD (HOLD)
11.6 Call Waiting (CW) services
11.7 Communication diversion (CDIV) services
11.8 Explicit communication
transfer (ECT) service
11.9 Originating CRT service interacting with terminating CRT
service
12 Security considerations
Annex A – Multi-dialog mode
A.1 General description
A.2 Signalling requirements
Appendix I – Signalling flows
I.1 CRT service using gateway model
I.2 CRT service using application server model
I.3 CRT service using HTTP model
I.4 CRT service priority using application server model
Bibliography