E.1 Basic Multimedia calls interworking between the IMS and CS Networks scenarios

29.1633GPPInterworking between the IP Multimedia (IM) Core Network (CN) subsystem and Circuit Switched (CS) networksTS

The Interworking between Circuit switched multimedia telephony service, as described in 3GPP TS 26.110 [78] and 3GPP TS 26.111 [79], and packet switched multimedia services, as described in 3GPP TS 26.114 [104] is addressed.

NOTE: Examples in the present Annex assume that the ITU-T H.263 [84] video codec is used at the CS side. However, in the present release of 3GPP TS 26.114 [104], the H,263 video codec is no longer recommended (although it has been mandated in previous releases).

Figure E.1.1.1 Overview of relevant CS-Domain Protocols (from TS 26.110 [78])