ultiplexing, into 24 channels. Each channel has a bit rate of 64 Kbps. Frames of data are created 8,000 times a second by combining each channel's 8-bit time slot into a group of 192 bits, a synchronization bit is added to the frame that makes it 193 bits wide. These 193-bit frames are sent 8,000 times a second and received by a channel bank or T-1 multiplexer. T.120 The ITU-T's "Transmission Protocols for Multimedia Data," a data sharing/data conferencing specification that lets users share documents during any H.32x videoconference. Like H.32x specifications, T.120 is an umbrella Recommendation that includes a number of other Recommendations Data-only T.120 sessions can be held when no video communications are required, and the standard also allows multipoint meetings that include participants using different transmission media. The mandatory components of T.120 include recommendations for multipoint file transfer and shared-whiteboard implementation. T.121 The T.120 family member that is formally known as "Generic Application Template." This template encompasses those operations that are common to most T.120 application protocols. T.122 ITU-T Recommendation that is part of the T.120 family and which is known as "Multipoint Communication Service for Audiographics and Audiovisual Conferencing Service Definition." T.122 defines the multipoint services available to an applications developer while T.125 specifies the data Video Communication: the Whole Picture protocol used to implement these services. T.123 ITU-T Recommendation that is part of the T.120 family and which is known as "Protocol Stacks for Audiographic and Audiovisual Teleconference Applications." This protocol covers public switched telephone networks, ISDN, circuit switched digital networks, packet-switched digital networks, Novell NetWare IPX (via a reference profile) and TCP/IP. T.124 ITU-T Recommendation that is part of the T.120 family and which is known as that allows "Generic Conference Control." T.125 ITU-T Recommendation that is part of the 