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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
06Mar/13

New Developer: Hugh Waite

March 6, 2013Newsmiconda

We are glad to announce that a new person got developer GIT write access to repository: Hugh Waite – he is quite old contributor by now, with many patches and activity onRead More…

28Feb/13

Getting close to 4.0.0 release – here’s how to test

February 28, 2013News, Releases4.0.0oej

We are getting very close to 4.0.0 release. Yesterday Daniel branched out 4.0.0 into a special GIT branch, opening up the GIT master branch for new code additions. We still encourage usersRead More…

25Feb/13

Kamailio v3.3.4 Released

February 25, 2013News, Releasesmiconda

Kamailio SIP Server v3.3.4 stable is out – a minor release including fixes in code and documentation since v3.3.3 – configuration file and database compatibility is preserved. Kamailio (former OpenSER) v3.3.4 isRead More…

22Feb/13

Kamailio 4.0.0 beta stress-tested at SIPit #30

February 22, 2013Events, Newsoej

SIPit is the event created by the SIP Forum to test the SIP protocol impementations that Open Source projects and vendors have. It’s not a certification, it’s a test lab where everyoneRead More…

11Feb/13

Kamailio World – First set of accepted presentations

February 11, 2013Events, Kamailio World, Newsmiconda

First set of accepted presentations for Kamailio World Conference has been published. Visit the Schedule page for the current draft of the agenda: http://conference.kamailio.com/k01/schedule/ About 15 sessions and speakers have been addedRead More…

07Feb/13

Tips: Make it easy to trace SIP dialogs and transactions with Homer!

February 7, 2013Companion Software, Tips & Trickscallflows, diagrams, homer, sipcapture, siptraceoej

Kamailio has two modules that is specially adopted for use with a 3rd party Open Source software – Homer SIPcapture.  Homer was awarded a Kamailio Award last year for it’s unique innovation.Read More…

30Jan/13

Add startup items to Kamailio

January 30, 2013Tips & Tricksevent_route, htable, scripting, startup itemsoej

When Kamailio starts up, it forks into multiple processes and starts executing the routing script for every SIP request and response. Did you know that there is a simple way to executeRead More…

25Jan/13

The heat is on – Kamailio World is the Open Source Communication conference in Europe this spring!

January 25, 2013Kamailio World, Newskamailio worldoej

Kamailio World will be THE conference to attend for everyone in Europe that works with Open Source communication – from classic PSTN over IP, VoIP to realtime communication platforms! While the conference isRead More…

21Jan/13

Kamailio Development Workshop, Feb 14-15, 2013, Alicante, Spain

January 21, 2013Events, Newsasipto, development, trainingmiconda

Want to learn more about the inside of Kamailio? Next Kamailio Development Workshop takes place in Alicante, Spain, during February 14-15, 2013. The event is organized by Asipto and University of Alicante,Read More…

21Jan/13

Changes for version 4: Module structure and Perl support

January 21, 2013News4.0, app_perl, db_perlvdb, modules, perloej

As we are getting closer to release of version 4 we are focusing on documentation, release management and bug fixing. During the weekend there was a few big changes done that mayRead 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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