Emerging alternatives to today's to today's advanced service architectures for Internet telephony: IN and beyond

摘要

Two principal sets of standards are emerging for Internet telephony: H.323 from the ITU-T, and session initiation protocol (SIP) from the IETF. The advanced service architecture that comes with H.323 is rather archaic, and remi- niscent of the old days of circuit-switched telephony. The one that comes with SIP is more modern, but has its share of deficiencies. While improvements are being made, alternatives are being sought. Two trends are noticeable in the search for alternatives: the return to the old and well-known intelligent network (IN) architectural framework, and the ex- ploration of more recent approaches, such as mobile agent technology, that go beyond IN. This paper scrutinizes the trends in the search for alternatives to today's ITU-T and IETF advanced service architectures for Internet telephony.