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» OpenSIPS Control Panel 8.3.1 Released - 12 Jan 2021
The provisioning web interface matching OpenSIPS 3.1 is now ready to use! 
» OpenSIPS 3.2 Planning - 23 Dec 2020
The plan for the next 3.2 major release is here, so check its philosophy and features! 
» OpenSIPS 3.1 is out - 22th of July 2020
Let's welcome the 3.1 LTS stable release, focused on complex call crafting. Learn how you can do Call API, inter-call media exchange, Push Notification, STIR/SHAKEN and many others Class 5 adds-on.  

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)
» Download OpenSIPS
 3.1.1 - stable LTS release
2.4.9 - stable LTS release
» OpenSIPS Blog
 Stay connected to the OpenSIPS project via our official blog
» Donate
 Support OpenSIPS by making a donation to the project.
» VoIP Account
 Free VoIP Service by OpenSIPS
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Latest News...

NEW Prometheus Module in OpenSIPS 3.2
7th of May 2020 Find out how you can monitor OpenSIPS with Prometheus and plot its statistics in Grafana! Read more...

Exploring SSL/TLS libraries for OpenSIPS 3.2
11th of Feb 2021 What are the SSL/TLS library candidates for OpenSIPS, now that OpenSSL proofed to be a no-go for the future! Read more...

Improved series-based call statistics using OpenSIPS 3.2
02nd of Feb 2021 How to build custom time series statistics (like ACD, AST, PPT, ASR, NER, CCR) directly from OpenSIPS script! Read more...

Script driven SIP BAck-2-Back with OpenSIPs 3.2
07th of Jan 2021 The B2B support in OpenSIPS just got more powerful and simpler the use by migrating from XML to OpenSIPS routing script! Read more...

OpenSIPS Summit Distributed 2020- Speakers and Moderators
06th of Aug 2020 Some useful insights about the OpenSIPS Summit Distributed 2020 new format and new ideology ! Read more...

Call API first version has been released
11th of Jun 2020 The first version of the new Call API has been released. Check out how simple it is to control your calls through an API using this new cool project! Read more...

Cross dialog data accessing
18th of May 2020 Check out how easy is with OpenSIPS 3.1 to access the dialog and accounting data of another ongoing call! Read more...


Final release: OpenSIPS 3.0.5
22nd of December 2020 The last release of the OpenSIPS 3.0 version is now available to download! Read more...

Minor releases: OpenSIPS 3.1.1, 3.0.4 and 2.4.9
17th of November 2020 Three new minor releases are available for all supported OpenSIPS Branches! Read more...

Stable release: OpenSIPS 3.1.0
22nd of July 2020 OpenSIPS 3.1.0 stable LTS is now released! Read more...

Beta release: OpenSIPS 3.1.0
27th of May 2020 Check out the latest beta release of the new OpenSIPS 3.1.0! Read more...

Minor release: OpenSIPS 2.4.7 and 3.0.2
28th of January 2020 The new year has come with two new OpenSIPS minor releases: 2.4.7 and 3.0.2! Read more...

Minor release: OpenSIPS 3.0.1
1st of October 2019 The first minor release of OpenSIPS 3.0 branch consists of important bug fixes! Read more...

Page last modified on February 25, 2021, at 12:43 PM