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OpenSIPS is an Open Source SIP proxy/server for voice, video, IM, presence and any other SIP extensions.

OpenSIPS is a multi-functional, multi-purpose signaling SIP server used by carriers, telecoms or ITSPs for solutions like Class4/5 Residential Platforms, Trunking / Wholesale, Enterprise / Virtual PBX Solutions, Session Border Controllers, Application Servers, Front-End Load Balancers, IMS Platforms, Call Centers, and many others - see the full Set of Features.

OpenSIPS is recommended for any kind of SIP scenario / service by:

• the high throughput - tens of thousands of CPS, millions of ‏simultaneous calls (see official tests)
• the flexibility of routing and integration - routing script for implementing custom routing logics, several interfacing APIs (see the Manual)
• the effective application building - more than 120 modules to provide features, for SIP handling, for backend operations, for integration, for routing logics (see List of Modules)

Latest News...

Deep Dive into the OpenSIPS Statistics Support
20th of November 2017 Learn about concepts such as architecture and advanced uses for the OpenSIPS statistics Read more...

Call Recording in OpenSIPS 2.4 using SIPREC
9th of Nov 2017 The ability to record the calls that go through your platform is gradually shifting from being a feature to being a necessity. Using the new SIPREC module in OpenSIPS 2.4 you can do call recording to an external recorder in a standard manner! Read more...

Running OpenSIPS in the Cloud
25th of Oct 2017 Cloud computing is a more and more viable option for running and providing SIP services. The question is how compatible are the SIP services with the Cloud environment ? . Read more...

OpenSIPS as HEP Proxy/Switch
12th of Oct 2017 HEP Switching – how to access, manipulate and proxy steams of HEP packets in order to support heavy-load and complex capturing scenarios. Read more...

Call Recording using OpenSIPS and SIPREC!
29th of Sep 2017 Using the new SIPREC module you can do audio call recording in a non-intrusive way, by using an external/passive SIP recorder. Read more...

Troubleshooting OpenSIPS script
20th of September 2017 Scripting OpenSIPS means doing programming. And programing comes together with troubleshooting and debugging. So how can you do this with OpenSIPS? Read more...

OpenSIPS Control Panel and Homer Integration
2nd of August 2017 OpenSIPS and Homer can integration at different levels - at data level and....at web level. Read more...

OpenSIPS Control Panel 7.2.3 is released
5th of July 2017 One more dev cycle and OpenSIPS Control Panel 7.2.3 corresponding OpenSIPS 2.3 is available and ready to be used. Read more...

Releases...

Minor release: OpenSIPS 2.3.2
31st of Aug 2017 A new OpenSIPS 2.3 version featuring major fixes has been released! Read more...

Minor release: OpenSIPS 2.3.1 and 2.2.5
5th of Jul 2017 All releases contain important fixes, so upgrade your installs as soon as you can! Read more...

Minor release: OpenSIPS 2.2.4 and 1.11.11
18th of May 2017 All releases contain important fixes, so upgrade your installs as soon as you can! Read more...

Major release: OpenSIPS 2.3.0
26th of Apr 2017 After several fixes and improvements, we've finally released the latest OpenSIPS 2.3 stable version! Read more...

Major release: OpenSIPS 2.3.0 beta
16th of Mar 2017 A new major step in OpenSIPS evolution - the 2.3 branch is now ready with the OpenSIPS 2.3.0 beta released! Read more...

Minor releases: OpenSIPS 2.2.3 and 1.11.10
23rd of Feb 2017 All releases contain important fixes, so upgrade your installs as soon as you can! Read more...