T.120
From Wikipedia, the free encyclopedia
T.120 is a suite of point-to-multipoint communication protocols for teleconferencing, videoconferencing, and computer-supported collaboration.[1] It provides for application sharing, online chat, file sharing, and other functions. The protocols are standardised by the ITU Telecommunication Standardization Sector (ITU-T).[1]
T.120 has been implemented in various real-time collaboration programmes, including WebEx and NetMeeting.[2][3] IBM Sametime switched from the T.120 protocols to HTTP(S) in version 8.5.[4]
The prefix T designates the ITU subcommittee that developed the standard, but it is not an abbreviation. The ITU (re)assigns these prefixes to committees incrementally and in alphabetic order.[5]
The T.123 standard specifies that T.120 protocols use network port 1503 when communicating over TCP/IP.[5]