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9Chapter
SIP: Session Initiation
Protocol
is chapter explains SIP in detail. e different networks where SIP can be used
are discussed, as are the problems in SIP networks and some of the solutions. A few
SIP applications are also discussed.
SIP: A Historical Snapshot
SIP RFC 3261 [1] emerged in the mid-1990s, originally created by Henning
Schulzrinne [2] at Columbia University (United States) and his research team. A
co-author of the Real-Time Transport Protocol (RTP) [4] for transmitting real-
time data via the Internet, Professor Schulzrinne also co-wrote the Real Time
Streaming Protocol (RTSP) [6], a proposed standard