Session Initiation Protocol
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Key facts
- Abbreviation
- SIP
- Purpose
- Internet telephony
- Introduction
- March 1999 ; 27 years ago ( 1999-03 )
- Osi layer
- Application layer (Layer 7)
- Port s
- 5060, 5061
- Rfc s
- 2543 , 3261
via Wikipedia infobox
Article
The Session Initiation Protocol (SIP) is a signaling protocol used for initiating, maintaining, modifying, and terminating communication sessions that involve multimedia elements such as voice, video, and messaging. It operates at the application layer of the Internet protocol suite and is widely used in Internet telephony, private IP-based telephone systems, and mobile communication over LTE networks through VoLTE.
SIP is a text-based protocol modeled on the structure of HTTP and SMTP, enabling interoperability and integration with other Internet applications. It provides mechanisms for user location, session setup, and session management, making it a foundational component of modern IP multimedia systems.