H.323 is a recommendation from the ITU Telecommunication Standardization Sector (ITU-T) that defines the protocols to provide audio-visual communication...

H.245 is a control channel protocol used with[in] e.g. H.323 and H.324 communication sessions, and involves the line transmission of non-telephone signals...

An H.323 Gatekeeper serves the purpose of Call Admission Control and translation services from E.164 IDs (commonly a phone number) to IP addresses in...

goal developing a full featured, open source (MPL) implementation of the H.323 Voice over IP protocol. The code is written in C++ and, through the development...

interoperable. They are both complementary to H.323 and the Session Initiation Protocol (SIP) protocols. H.248 was the result of collaboration of the MEGACO...

H.235 covers security and encryption for H.323 and other H.245 based terminals. The standard addresses authentication by means of several algorithms, including...

gradually replaced or complemented by standardized protocols, including H.323, especially SIP. The protocols works through a "master" / "slave" mode of...

signaling proxy for call events initiated over other common protocols such as H.323, and Session Initiation Protocol (SIP) for voice over IP, or ISDN for the...

Initiation Protocol (SIP), connection management protocol developed by the IETF H.323, one of the first VoIP call signaling and control protocols that found widespread...

Gatekeeper (abbreviated as GnuGk) is a free software project that implements an H.323 Gatekeeper based on the OpenH323 or H323Plus stack. A gatekeeper provides...