Session Initiation Protocol - by its abbreviations in English

It is a protocol developed by the work group IETF MMUSIC and a proposed standard to initialize, to modify and to finish an interactive session between users who involve multimedia elements such as voice, video, instantaneous mail, games in line and virtual reality.

In November of the 2000, protocol SIP was accepted as a protocol of signaling 3GPP and a permanent element of architecture IMS. He is one of the signaling protocols leaders for voice over ip (VoIP) along with H.323.