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» Beta release for OpenSIPS 3.5 - 09 May 2024
The new major 3.5 version is ready, bringing a first complete IMS support, improved SQL ops and many more. 
» OpenSIPS Summit 2024, 14-17 May, Valencia - 13 March 2023
The 2024 Summit has listed its speakers and schedule! Register now and get ready for them! 
» OpenSIPS Control Panel 9.3.4 Released - 09 November 2023
As the official companion for OpenSIPS 3.4 . 

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)

OpenSIPS 3.2 release was subject of a security audit, making everything safer and more secure for everybody.

» Download OpenSIPS
 3.5.0-beta - beta release
3.4.5 - stable LTS release
3.2.18 - 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.
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 Free VoIP Service by OpenSIPS
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Latest News...

HTTP/2 Server Support for Next-Generation Services in OpenSIPS 3.5
27th of March 2024 OpenSIPS 3.5 includes support for processing HTTP/2 requests, becoming more interoperable with other components in 5GC systems. Read more...

Build an IMS using OpenSIPS 3.5 S-CSCF
21st of March 2024 Focusing on the S-CSCF (Serving Call Session Control Function) component, with async Diameter, AKA auth and others. Read more...

The SQL support, reloaded
13th of March 2024 See how the SQLops module was born from the AVPops ashes and how you can do from script JSON structured SQL queries with prepared statements support. Read more...

Built-in Diameter Server in OpenSIPS 3.5
07th of March 2024 A blog post on how to build Diameter server-side logic within your opensips.cfg file. Read more...

LaunchDarkly integration with OpenSIPS 3.5
04th of March 2024 In-cloud management of feature flags was never been so easy as via LaunchDarkly and OpenSIPS 3.5. Read more...

IMS status in OpenSIPS 3.5
20th of February 2024 What are the goals when comes to the IMS support in OpenSIPS 3.5 and what is the current status of work. Read more...

OpenSIPS Control Panel 9.3.4 has been released
9th of November 2023 OpenSIPS Control Panel 9.3.4 corresponding to the latest OpenSIPS 3.4.x version is now released Read more...

Our Participation in the OpenSIPIt'03 online testing event!
5th of October 2023 A few words about how the event unfolded and what we got out of it. Read more...

Troubleshooting one way audio calls
06th of July 2023 We all faced the "One way audio" problem, but troubleshooting it was not always a clear path, as the causes were not fully understood all the time. Read more...


Minor releases: OpenSIPS 3.4.5, 3.2.18
18th of April 2024 A new round of minor versions for all stable releases. Read more...

Minor releases: OpenSIPS 3.4.4, 3.3.10, 3.2.17
21st of February 2024 A new round of minor versions for all stable releases. Read more...

Minor releases: OpenSIPS 3.4.3, 3.3.9, 3.2.16
20th of December 2023 EOL for OpenSIPS 3.3! New minor versions for all stable releases. Read more...

Minor releases: OpenSIPS 3.4.2, 3.3.8, 3.2.15
18th of October 2023 New minor versions for all stable releases! Read more...

Minor releases: OpenSIPS 3.4.1, 3.3.7, 3.2.14, 3.1.17
31st of August 2023 Four new minor versions of our stable releases are out! Read more...

OpenSIPS 3.1 End of support!
31st of August 2023 OpenSIPS 3.1.x branch is no longer supported, with the 3.1.17 version being the last release of the stable branch! Read more...

Announcing: OpenSIPS 3.4 LTS stable!
19th of July 2023 OpenSIPS 3.4.0-rc1 now promotes to 3.4.0 stable, which will be supported for the next 3 years! Read more...

Page last modified on June 10, 2024, at 06:15 PM