System for establishing communication between audiovisual terminals using digital channels up to 2 Mbit/s SERIES H: AUDIOVISUAL AND MULTIMEDIA SYSTEMS Infrastructure of audiovisual services ?Communication procedures Study Group 16
Videophone, videoconferencing and other conversational multimedia services on fixed bit-rate networks (such as ISDN) depend on the multiplex structure described in ITU-T Rec. H.221. The control channel within this multiplex is the so-called BAS position i