T.120

In today's world, T.120 has become a topic of increasing interest. Over time, the importance of T.120 has been consolidated in different areas, from people's personal lives to the global economy. The relevance of T.120 has led to research being carried out and debates generated around this topic, in order to fully understand it and make informed decisions about it. In this article, we will explore different aspects related to T.120, from its origin to its implications today, with the aim of providing a comprehensive vision of this topic that has so much impact on society.

T.120 is a suite of point-to-multipoint communication protocols for teleconferencing, videoconferencing, and computer-supported collaboration. It provides for application sharing, online chat, file sharing, and other functions. The protocols are standardised by the ITU Telecommunication Standardization Sector (ITU-T).

T.120 has been implemented in various real-time collaboration programmes, including WebEx and NetMeeting. IBM Sametime switched from the T.120 protocols to HTTP(S) in version 8.5.

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.

The T.123 standard specifies that T.120 protocols use network port 1503 when communicating over TCP/IP.

Components

Number Title Status Refs
T.120 Data protocols for multimedia conferencing In force
T.121 Generic application template In force
T.122 Multipoint communication service - Service definition In force
T.123 Network-specific data protocol stacks for multimedia conferencing In force
T.124 Generic Conference Control In force
T.125 Multipoint communication service protocol specification In force
T.126 Multipoint still image and annotation protocol In force
T.127 Multipoint binary file transfer protocol In force
T.128 Multipoint application sharing In force
T.130 Realtime architecture ?
T.131 Network specific mappings ?
T.132 Realtime link management ?
T.133 Audio visual control services ?
T.134 Text chat application entity In force
T.135 User-to-reservation system transactions within T.120 conferences In force
T.136 Remote device control application protocol Superseded by H.281
T.137 Virtual meeting room management for multimedia conferencing audio-visual control In force
T.RES Reservation services ?
T.TUD User reservation ?
  1. ^ T.128 was previously called T.Share while in draft stage.

See also

References

  1. ^ a b Clark, W. J. (1994). "Protocols for Multimedia Conferencing: An Introduction to the ITU-T T.120 series". In Hutchison, D.; Danthine, A.; Leopold, H.; Coulson, G. (eds.). Proceedings of the International COST 237 Workshop on Multimedia Transport and Teleservices. Springer-Verlag. p. 322. doi:10.1007/3-540-58759-4_43.
  2. ^ "Evaluation of Shared Display in WebEx and VNC". Community Grids Heritage Web Server: Summer 2000–2001. Indiana University Bloomington. Section: "Network communication". Retrieved 13 March 2018.
  3. ^ a b c United States patent 6317777B1, Rune A. Skarbo; Christopher C. Lawless & Puneet Kukkal et al., "Method for web based storage and retrieval of documents", issued 2001-11-13, assigned to Intel 
  4. ^ Chiabra, Roberto. "What's New in Sametime 8.5" (PDF). IBM DeveloperWorks. IBM. Retrieved 13 March 2018.
  5. ^ a b Zwicky, Elizabeth D.; Cooper, Simon; Chapman, D. Brent (June 2000). "Multimedia Protocols". Building Internet Firewalls (2nd ed.). O'Reilly Media. Subsection: "Packet filtering characteristics of T.120". ISBN 978-1-56592-871-8. OCLC 639935671. Retrieved 20 February 2018.
  6. ^ "T.120 : Data protocols for multimedia conferencing". ITU.int. International Telecommunication Union. Retrieved 3 March 2018.
  7. ^ "T.121 : Generic application template". ITU.int. International Telecommunication Union. Retrieved 3 March 2018.
  8. ^ "T.122 : Multipoint communication service - Service definition". ITU.int. International Telecommunication Union. Retrieved 3 March 2018.
  9. ^ "T.123 : Network-specific data protocol stacks for multimedia conferencing". ITU.int. International Telecommunication Union. Retrieved 3 March 2018.
  10. ^ "T.124 : Generic Conference Control". ITU.int. International Telecommunication Union. Retrieved 3 March 2018.
  11. ^ "T.125 : Multipoint communication service protocol specification". ITU.int. International Telecommunication Union. Retrieved 3 March 2018.
  12. ^ "T.126 : Multipoint still image and annotation protocol". ITU.int. International Telecommunication Union. Retrieved 3 March 2018.
  13. ^ "T.127 : Multipoint binary file transfer protocol". ITU.int. International Telecommunication Union. Retrieved 3 March 2018.
  14. ^ "T.128 : Multipoint application sharing". ITU.int. International Telecommunication Union. Retrieved 3 March 2018.
  15. ^ a b c d e f g Freedman, Alan. "T.120". Computer Desktop Encyclopedia. The Computer Language Company. Retrieved 3 March 2018.
  16. ^ "T.134 : Text chat application entity". ITU.int. International Telecommunication Union. Retrieved 3 March 2018.
  17. ^ "T.135 : User-to-reservation system transactions within T.120 conferences". ITU.int. International Telecommunication Union. Retrieved 3 March 2018.
  18. ^ "T.136 : Text chat application entity". ITU.int. International Telecommunication Union. Retrieved 3 March 2018.
  19. ^ "H.281 : A far end camera control protocol for videoconferences using H.224". ITU.int. International Telecommunication Union. Retrieved 3 March 2018.
  20. ^ "T.137 : Virtual meeting room management for multimedia conferencing audio-visual control". ITU.int. International Telecommunication Union. Retrieved 3 March 2018.

External links

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