Session Initiation Protocol is a telephony signaling protocol used in VoIP communications for initiating an interactive user session that involves multimedia elements such as video, voice, chat, gaming, virtual reality, mostly used for free.

Learn more

First released 1996
Developed by Mark Handley, Henning Schulzrinne, Eve Schooler, Jonathan Rosenberg
Open-source Not defined
Used by Vodafone, Utel, AT&T

Development by

Sign up for updates
straight to your inbox