Session Initiation Protocol (SIP)
SIP is a signaling protocol used for establishing sessions in an IP network. It is an IETF application layer protocol for establishing, manipulating, and tearing down sessions. A session could be a simple two-way telephone call or it could be a collaborative multi-media conference session. The ability to establish these sessions means that a host of innovative services become possible, such as voice-enriched e-commerce, web page click-to-dial, Instant Messaging with buddy lists, and IP Centrex services.
SIP's main purpose is to help session originators deliver invitations to potential session participants wherever they may be. SIP was designed to work with a broad spectrum of IP telephony protocols. To this end SIP provides four basic functions.
- Allows for the establishment of user location (i.e. translating from a user's name to their current network address)
- Provides for feature negotiation so that all of the participants in a session can agree on the features to be supported among them
- A mechanism for call management - for example adding, dropping, or transferring participants
- Allows for changing features of a session while it is in progress
Our Session Initiation Protocol (SIP) experts help enterprises reap the benefits of VoIP without the cost and hassle of replacing your current telecommunication system.