P-based networks. To accomplish this, T.MT relies on several different methods to transport data across IP-based networks. The first is UDP (see Chapter 9). The second is OSI end-to-end services on top of the Internet suite of protocols (TCP/IP). OSI over TCP relies on RFC 1006, an important IETF document ("ISO Transport Arrives on Top of the TCP/IP") co-authored by Dwight Cass and Marshall T. Rose. Additional transport techniques include Multicast Transport Protocol-2 (MTP-2), which is a revised version of MTP (originally introduced as RFC 1301) and Real-Time Multicast Protocol (RMP); T.MT also includes an other category for IP-based transport protocols yet unspecified. T.MT's deployment has been limited because Internet service providers do not want their already over-subscribed networks to have to support the additional traffic that Multicast introduces. As bandwidth becomes cheaper and, subsequently, as the backbones become more robust, T.MT may play an important role. T.130 T.130 (along with T.132) was determined in March 1997 and ratified in 1998. Like T.120, it is an overview document that incorporates subordinate recommendations. These provide a network-independent control service for Real-Time audio and video streams. Implementation of the completed standard will allow users to coordinate the audio and video components of a conference across diverse network boundaries. At the IMTC's Fall Forum in Sunriver, Oregon, Pat Romano, Director of Advanced Development, Polycom, Inc., delivered an update on the ITU-T's progress as it relates to T.130. Our discussion of T.130 is primarily based on this presentation. Even at the end of 1999, little exists on T.130 because it simply has not been deployed. Vendors Video Communications: The Whole Picture all state that they are interested in T.130 and that they are following the standard. The T.130 specifications are: T.130 Real Time Audio-Visual Control for Multimedia Conferencing T.131 Network Specific Mappings T.132 AVC: Infrastructure Management T.133 AVC: Conferenc