» OpenSIPS Community Edition Solutions - 29 October 2024 Open Source complete platforms to address real-life SIP scenarios, for demos, a PoCs, or startup production.  » OpenSIPS Control Panel 9.3.5 Released - 10 October 2024 As the official companion for OpenSIPS 3.5, with upgrades and extensions.  » Stable release OpenSIPS 3.5.0 - 25 July 2024 The first stable release of the 3.5 family is out, bringing a first complete IMS support, improved SQL ops and many more.

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.

Latest News...

OpenSIPS Python Package
20th of November 2024 Read our latest blog post which provides all the information you need to use the new OpenSIPS Python Package. Read more...

Optimize User Experience by Filtering Slow SIP Registrations
13th of November 2024 Or how to improve your SIP Service by filtering or/and sorting the registrations based on their latency. Read more...

New OpenSIPS Control Panel Config tool in 9.3.5
17th of October 2024 Check out how you can implement OpenSIPS real-time Controls using Control Panel 9.3.5: Read more...

How to Eliminate Zombie Registrations in OpenSIPS
04rd of October 2024 Or how to improve your OpenSIPS registrar performance and also your user's experience in the same time. Read more...

Amazon’s SQS Events in OpenSIPS 3.6
10th of September 2024 More on the OpenSIPS 3.6 integration with the AWS cloud using Amazon Simple Queue Service (SQS). Read more...

Amazon’s DynamoDB integration in OpenSIPS 3.6
07th of August 2024 OpenSIPS 3.6 turns an eye on backends to facilitate AWS integration, like DynamoDB NoSQL database. Read more...

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...

Releases...

Minor releases: OpenSIPS 3.5.2, 3.4.9
23rd of October 2023 Two new minor versions of our stable releases are out! Read more...

Minor releases: OpenSIPS 3.5.1, 3.4.8
21st of August 2024 A new round of minor versions for all stable releases. Read more...

Minor releases: OpenSIPS 3.5.0-rc1, 3.4.6 and 3.2.19
19th of June 2024 New minor releases for all versions. EOL for OpenSIPS 3.2! 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...