2ITU-T H. 324. Terminal for Low Bit Rate Multimedia Communication [S]. Switzerland: ITU-T, 2005.
3ITU-T H. 245. Control protocol for multimedia communication [S].Switzerland: ITU-T, 2009.
43GPP IS 22.228. Service Requirements for the Internet Protocol (IP) Multimedia Core Network Subsystem, Stage 1 (Release 9) [S]. USA: 3GPP, 2010.
5韩振东.3G_NGN视频电话互通关键技术研究[c].中国:[s.n.],2009:715.
6ITU -T Q. 1912.5. Interworking between SIP and BICC or ISDN User Part [S]. Switzerland: ITU T, 2004.
7IETF RFC3578. Mapping of Integrated Services Digital Network (ISDN) User Part (ISUP) Overlap Signalling to the Session Protocol (SIP) [S]. [s. l.]:IETF, 2003.
83GPP TS 26.111 version 9.0.0 Release 9. Codec for Circuit Switched Multimedia Telephony Service, Modifications to H. 324[S]. USA: 3GPP, 2010.