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Video Conferencing Standards and Terminology

Video Conferencing Standards and Terminology.
There is an ever increasing number of standards, terminologies and buzz-words used within the video conferencing industry that can make understanding what is both available and compatible a minefield. We have the H.300's, the G.700's, the T.120's and the H.460's, not to mention ISDN, LAN, WAN, ADSL, VPN and POTS all mixed with NTSC, PAL and CIF. To complicate matters more, we also have to deal with the forthcoming media-enabled 3G mobile phone and how this links in with existing systems. This document explains what these standards, terminologies and buzz-words mean, how they relate to the various communications infrastructures of video conferencing and how they relate to each other.
It is assumed that the reader has a general knowledge of Video Conferencing systems. However, the following technical papers are available to provide more information: * How do I choose a Video Conferencing system? * H.323 Terminals, Gatekeepers, Gateways & MCUs. * Global Dialling Scheme (GDS) for Schools VideoConferencing. * H.323 Dial Plan and Service Codes used by Gatekeepers etc. * IP Ports and Protocols used by H.323 Devices. * Cost Efficient ISDN Conferencing, including Multipoint Access. * H.221 Framing used in ISDN Conferences.
International Telecommunications Union & The Internet Engineering Task Force.
Telecommunications standards are set by the United Nations agency, International Telecommunications Union (ITU)and the Internet Engineering Task Force (IETF). Products that adhere to these standards allow users to participate in a conference, regardless of their platform. These standards for desktop video conferencing ensure compatibility on a worldwide basis. The ITU has developed the H, G and T Series of standards whilst the IETF has developed

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