SIP BackeOff

SIP interoperability test events are gatherings of SIP implementors to test interoperability of their creations.

They take place roughly every four months, hosted by different companies and organizations. The first SIP interoperability event took place in August of 1999.

The event is managed by a Technical Program Committee. Attendees and organizers should consult the general FAQ, while hosting organizations need more detailed information.

SIP Backeoff participants


The SIPit, or Session Initiation Protocol Interoperability Test, is a weeklong event where people bring their SIP implementations to ensure they work together.

Each SIPit is open to anyone with a working SIP implementation. The goal of the events is to refine both the protocol and its implementations. SIPit is a driving force shaping SIP into a globally interoperable protocol for real time Internet communication services.

Currently, SIPit is held every 18 to 24 months. Different companies or organizations host each event, and each host chooses the venue.

SIPit participants

  • Sixt, December 8-10 2000, Sylantro and Sun, (Santa Clara, CA, USA)

  • Seventh, March 26 -30 2001, Royal Hotel Casino (Mandelieu, France)

  • Eight, August 13-17 2001, Ubiquity (Cardiff, UK)

  • Ninth, December 2-7 2001 in Nuera (San Diego, CA, USA).

SIP Bakeoff vs. Pillsbury:

Pillsbury has threatened to sue Columbia University if we continue to use the term bake-off. They have more lawyers than we do, so they win. The University is too chicken/cheap to defend its faculty, unfortunately, thus the new name SIPit.