H.323

from The Free On-line Dictionary of Computing (8 July 2008)

H.323

   <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)