SIP B

SIP B is the short for Session Initiation Protocol for Business (SIP for Business). It is the SIP-based protocol that provides advanced SIP functions which can be used for business telephony networks. SIP for Business never change the SIP standard at all nor it does suggests an extension or modification to the SIP original standard.

It is the series of standard SIP-based call flows.

Sylantro Systems having consultation with other giants like Polycom, and Siemens developed the SIP originally.