- T.120
T.120 is an ITU-T recommendation that describes a series of communication and application protocols and services that provide support for real-time, multipoint data communications. It is used by products such as
Cisco WebEx 'sMeetingCenter ,Microsoft NetMeeting ,Nortel CS 2100 andLotus Sametime to support application sharing, real-time text conferencing and other functions.The set of "T.120" recommendations includes:
* T.120 - Data protocols for multimedia conferencing
* T.Imp120 - Revised Implementor's Guide for the ITU-T T.120 Recommendation series
* T.121 - Generic application template
* T.122 - Multipoint communication service - Service definition
* T.123 - Network-specific data protocol stacks for multimedia conferencing
* T.124 - Generic Conference Control
* T.125 - Multipoint communication service protocol specification
* T.126 - Multipoint still image and annotation protocol
* T.127 - Multipoint binary file transfer protocol
* T.128 - Multipoint application sharing (was known as T.share while in draft stage)
* T.134 - Text chat application entity
* T.135 - User-to-reservation system transactions within T.120 conferences
* T.136 - Remote device control application protocol
* T.137 - Virtual meeting room management - services and protocolThe [http://www.pcmag.com/encyclopedia_term/0,2542,t=T120&i=52480,00.asp PCMag encyclopedia of computer terms] lists the following additional recommendations:
* T.130 - Realtime Architecture - Interaction between T.120 and H.320.
* T.131 - Network Specific Mappings - Transport of realtime data used with T.120 over LANs.
* T.132 - Realtime Link Management - Creation and routing of realtime data streams.
* T.133 - Audio Visual Control Services - Controls for realtime data streams.
* T.RES - Reservation Services - Interaction between devices and reservation systems
* T.Share - this is now known as T.128
* T.TUD - User Reservation - Transporting user-defined dataThese are not listed on the official ITU-T website.It is possible that these recommendations have been withdrawn.
T.RES and T.TUD are possibly recommendations that did not make it out of draft stage; the ITU practice is to use the series letter + an alphanumeric code for the recommendation while it is in draft, and a number after publication.
External links
* [http://www.itu.int/rec/recommendation.asp?type=products&lang=e&parent=T-REC-T List of ITU-T T series recommendations]
: comm-stub
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