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Continuous Development Since 2001
SER-Kamailio - the project that shaped the evolution of open source real time communications
Powering Open Real Time Communications
SIP Load Balancer, IP Telephony Engine, Least Cost Routing, SIP Firewall, Edge Proxy, SBC, Registrar and Location Service, Instant Messaging and Presence, MSRP, WebRTC, IPv4-IPV6, IMS, VoLTE
30Nov/22

Online Devel Meeting – Dec 08, 2022, 15:00UTC

November 30, 2022Development News, Events, Newsmiconda

To summarise what happened a few weeks ago at the devel meeting in Dusseldorf and plan the next steps for the project, we are planning an online development meeting on Thu, DecRead More…

10Oct/22

Kamailio At ClueCon 2022

October 10, 2022Events, Newsmiconda

The next ClueCon is approaching, an edition that is organized in Chicago, IL, USA, during October 17-21, 2022. Kamailio continues to have a strong presences, with presentations and tutorials from Daniel-Constantin MierlaRead More…

07Oct/22

Kamailio At RTC Conference 2022

October 7, 2022Events, Newsmiconda

Fred Posner will present about Kamailio at RTC Conference 2022, the event organized by Ilinois Institute of Technology, this year taking place online. The presentation “Kamailio: 20 years of Open Source SIP”Read More…

06Oct/22

Kamailio v5.6.2 Released

October 6, 2022Development News, News, Releasesmiconda

Kamailio SIP Server v5.6.2 stable is out – a minor release including fixes in code and documentation since v5.6.1. The configuration file and database schema compatibility is preserved, which means you don’t haveRead More…

29Sep/22

DEFEXP – Preprocessor Define With Expression

September 29, 2022Development News, Newsmiconda

Following the recent new feature of #!ifexp based on snexpr, another preprocessor directive was added which allows defining IDs with a value computed from the evaluation of an expression, respectively: #!defexp IDRead More…

21Sep/22

Kamailio Developers Meeting, Nov 16-17, 2022, in Dusseldorf

September 21, 2022Development News, Events, Newsmiconda

Kamailio SIP Server project is organizing another meeting of its developers during November 16-17, 2022, hosted again by sipgate.de in Dusseldorf, Germany. The event is intended to facilitate the interaction between Kamailio developersRead More…

19Sep/22

Kamailio v5.5.5 Released

September 19, 2022Development News, News, Releasesmiconda

Kamailio SIP Server v5.5.5 stable is out – a minor release including fixes in code and documentation since v5.5.4. The configuration file and database schema compatibility is preserved, which means you don’t haveRead More…

16Sep/22

Kamailio v5.4.9 Released

September 16, 2022Development News, News, Releasesmiconda

Kamailio SIP Server v5.4.9 stable is out – a minor release including fixes in code and documentation since v5.4.8. The configuration file and database schema compatibility is preserved, which means you don’t haveRead More…

15Sep/22

IFEXP – Conditional Preprocessor Blocks

September 15, 2022Development News, News, Tips & Tricksmiconda

A new feature has landed to Kamailio devel version, bringing in more flexibility for preprocessing of the kamailio.cfg file. It is about #!ifexp, which allows to evaluate an expression created with definedRead More…

06Sep/22

Kamailio World Conference Online 2022 – Starting Tomorrow

September 6, 2022Events, Kamailio World, Newsmiconda

Time has come for another online edition of Kamailio World Conference, the event enabling community networking and knowledge sharing for Kamailio SIP Server project. The 10th edition starts tomorrow, Wednesday, September 7,Read More…

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News

  • Kamailio v5.7.7 Released May 21, 2025
  • Donating To Kamailio Project April 7, 2025
  • Kamailio v5.8.6 Released March 20, 2025
  • Kamailio World 2025 – A Preview Of Sessions March 19, 2025
  • Kamailio v6.0.1 Released March 10, 2025
  • Kamailio World 2025 – First Group Of Speakers Announced February 24, 2025
  • Open Source 6G Networks for Connecting the Unconnected Workshop 2025 February 17, 2025
DONATE TO KAMAILIO

– Download latest release –

6.0.1

(Mar 10, 2025)

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Short History

The initial name of the project was SIP Express Router (aka SER), started in 2001 by Fraunhofer Fokus Research Institute and released under GPLv2 in 2002. In 2005, OpenSER project spawned from SER and had to change the name to Kamailio in summer of 2008 due to trademark claims. During the autumn of 2008, Kamailio and SER teams decided to join back the projects and use further the Kamailio name.

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