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h.323

h.323 in Technology
communications, standard
The ITU-T standard for sending voice (audio) and video using IP on a LAN without QoS.
H.323 includes Q.931 for call setup, H.225 for call signalling, H.245 for exchanging terminal capabilities, RTP/RTCP for packet streaming, G.711/G.712 for CODECs, and several other protcols, many of which need to be negotiated to setup a simple voice call.
The complexity of H.323 has lead to the IETF proposing the simpler alternatives SIP and MGCP/Megaco.
(2003-11-30)
The Free On-line Dictionary of Computing, © Denis Howe 2010 http://foldoc.org
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