SIP

From Bandipedia

SIP - Session Initiation Protocol

A text-based protocol (like HTTP or SMTP), used in multimedia (voice, video, instant messaging) applications to initiate, modify, or terminate an interactive user session.

SIP allows individuals to communicate regardless of what type of equipment is being used in real time, regardless of physical location. Similar to HTTP, SIP is text based, allowing all types of equipment to communicate with each other regardless of make or model.

Through SIP signaling, VoIP providers are able to offer many of the features traditionally found with a hardware PBX phone system or through the PSTN. SIP calls are commonly thought of as peer to peer calls and the features reside on the hardware.

Industry pundits are claiming 2006 as the year of SIP as this text based protocal gains mass acceptance throughout the world.

The Internet Engineering Task Force (IETF) played a large role in deveoping SIP back in the late 80's. Initially it was meant to replace H.323.

This technology is soon to be replaced by the new standard SIP-b. One hardware vendor that does support SIP-b is Polycom. There is a good reference page here VoIP-Info.org. You can visit Polycom here.

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