Support.avaya.com/css/P8/documents/100068145. Session Initiation Protocol. SIP works in conjunction with several other application layer protocols that identify and carry the session media.
Media identification and negotiation is achieved with the Session Description Protocol (SDP). For the transmission of media streams (voice, video) SIP typically employs the Real-time Transport Protocol (RTP) or Secure Real-time Transport Protocol (SRTP). For secure transmissions of SIP messages, the protocol may be encrypted with Transport Layer Security (TLS). History[edit] RFC 3261 - SIP: Session Initiation Protocol. [Docs] [txt|pdf] [draft-ietf-sip-rf...]
[Diff1] [Diff2] [IPR] [Errata] Updated by: 3265, 3853, 4320, 4916, 5393, 5621, PROPOSED STANDARD 5626, 5630, 5922, 5954, 6026, 6141, 6665, 6878, 7462, 7463 Errata Exist Network Working Group J. Rosenberg Request for Comments: 3261 dynamicsoft Obsoletes: 2543 H. Schulzrinne Category: Standards Track Columbia U. G.