Session Initiation Protocol (SIP) Version 4.0: P2P2PSIP
Bob Penfield, Hadriel Kaplan · 2008
This document defines a new and improved version of SIP, which tastes great and is less filling than the previous SIP. This draft updates all previous and future RFCs related to SIP in SIPPING, SIMPLE, MMUSIC, BEHAVE, and so on.