H.323
H.323 H.323 is, much like SIP ( Session Initiation Protocol ), a protocol designed for the setup, management, and termination of a media session. It is one of a set of standards from the ITU-T , which defines a large set of protocols to provide audio and visual communication over a computer network. ITU-T Recommendation H.323 pertains to the H.323 packet-based multimedia communications systems. It describes an infrastructure of terminals, common control components, services, and protocols that are used for multimedia (voice, video, and data) communications. An H.323 gateway is an optional type of endpoint that provides interoperability between H.323 endpoints and endpoints located on a Switched Circuit Network (SCN), such as the public switched telephone network (PSTN) or an enterprise voice network. Ideally, the gateway is transparent to both the H.323 endpoint and the SCN-based endpoint. H.323 and IP Recommendation H.323...