Short for Session Initiated Protocol, or Session Initiation Protocol, an application-layer control protocol; a signaling protocol for Internet Telephony.
SIP can establish sessions for features such as audio/videoconferencing, gaming, and call forwarding to be deployed over IP networks. This enables service providers to integrate basic IP telephony services with Web, e-mail, and chat services. In addition to user authentication, redirect and registration services, SIP Server supports traditional telephony features such as personal mobility, time-of-day routing and call forwarding based on the geographical location of the person being called.
