What is SIP?
SIP stands for Session Initiation Protocol. SIP is an Internet proposed standard documented in RFC 3261 for setting up, controlling and tearing down sessions in the Internet. Sessions include, but are not limited to, Internet telephone calls and multimedia conferences. SIP is also used for instant messaging and presence.
Short for Session Initiated Protocol, or Session Initiation Protocol, SIP is an application-layer control protocol and signaling protocol for Internet Telephony. SIP can establish sessions for features such as audio/videoconferencing, interactive gaming, and call forwarding to be deployed over IP networks, thus enabling 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.
SIP stands for Session Initiation Protocol. It is a signaling protocol used for establishing sessions in an IP network. SIP creates, modifies, and terminates “sessions” with one or more participants. A session could be a simple two-way telephone call or a collaborative multimedia conference session. SIP invitations are used to create sessions and carry information that allows participants to agree on a set of compatible media types. SIP makes use of elements called proxy servers to help route requests to users’ current locations, authenticate and authorize users for services, implement provider call-routing policies, and provide features to users. SIP also provides a registration function that allows users to upload their current locations to the proxy servers. SIP is the protocol of choice for signaling for VoIP traffic. It establishes and terminates voice “calls” flexibly and efficiently and minimizes hardware requirements and recurring network charges associated with traditional pho
