The T.120-Series of Recommendations collectively define a multipoint data
communication service for use in multimedia conferencing environments. The
purpose of this Recommendation is to provide an introduction and guide to the
T.120-Series. This Recommendation defines the T.120 architectural model and
shows the interrelationships between the constituent Recommendations. Each
Recommendation in the Series is outlined and the requirements for T.120
compliance are specified. Annex A specifies T.120 channel and token
allocations. Annex B specifies MCS domain parameters. Annex C specifies
lightweight profiles for the T.120 architecture.
This revised version of T.120 introduces a number of clarifications to
the previous version.