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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
25May/12

Kamailio and SEMS in a Risk-of-Life Service

May 25, 2012Newsmiconda

An interesting story sent by Jeremy A. on SEMS mailing list about use of Kamailio and SEMS in emergency services. “This is a belated report on the use of SEMS in aRead More…

16May/12

LinuxTag Workshop: Building secure UC service with Kamailio

May 16, 2012Newsmiconda

Daniel-Constantin Mierla, co-founder and member of management board for Kamailio project, will provide one hour workshop during LinuxTag Conference & Exhibition, Berlin, Germany. Scheduled on Thursday, May 24, 2012, the workshop willRead More…

14May/12

LinuxTag Talk: Rich Communications using SIP and Kamailio

May 14, 2012Newsmiconda

Carsten Bock, developer and member of management team for Kamailio project, will give a presentation at LinuxTag Conference & Exhibition in Berlin. The date of the talk is Wednesday, May 23, 2012.Read More…

08May/12

SEMS v1.4.3 Released

May 8, 2012Newsmiconda

On the 4th of May, 2012, the SIP Express Media Server project announced the availability of the SEMS 1.4.3 release. This is a SEMS 1.4 series bugfix release and should be aRead More…

07May/12

Kamailio at Linuxtag in Berlin

May 7, 2012Events, NewsBerlin, linuxtagoej

In a few weeks the Kamailio project will (again) be present on the LinuxTag fair in Berlin, “the most important place for Linux and open source software in Europe” –http://www.linuxtag.org/2012/en.html . If youRead More…

26Apr/12

Development frozen for v3.3.0

April 26, 2012Newsmiconda

Next major version of Kamailio SIP Server, to be numbered 3.3.0, entered in the last phase before release – development of new features has ended and testing phase began. After about 1-1.5Read More…

25Apr/12

New Developer: Richard Fuchs

April 25, 2012Newsdeveloper, sipwiseoej

We’re happy to announce a new developer for the project: Richard Fuchs. Richard has been working at Sipwise for over 4 years now and has already contributed many new features and bugRead More…

19Apr/12

Kamailio v3.2.3 Released

April 19, 2012Newsmiconda

Kamailio SIP Server v3.2.3 stable is out – a minor release including fixes in code and documentation since v3.2.2 – configuration file and database compatibility is preserved. Kamailio (former OpenSER) 3.2.3 isRead More…

26Mar/12

Next Events In Berlin

March 26, 2012Newsmiconda

After the Easter holidays, few events related to our project will take place in Berlin. If it happens to be around, drop by and meet developers or other community members. Social NetworkingRead More…

23Mar/12

ITSPA Awards 2012 – Open Source VoIP Projects

March 23, 2012Newsmiconda

ITSPA UK has unveiled the winners of its 4th annual Awards, an event designed to celebrate innovation and best practice in the VoIP industry. The event took place at the House ofRead More…

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News

  • Kamailio v6.0.2 Released June 25, 2025
  • 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
DONATE TO KAMAILIO

– Download latest release –

6.0.2

(June 25, 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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