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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
01Mar/10

Meet the project in March 2010

March 1, 2010Newskamailio, openser, ser, sip routeradmin

Members of Kamailio (OpenSER) and SIP Router projects participate at several VoIP Events in March 2010. Drop an email to sr-dev@lists.sip-router.org This email address is being protected from spam bots, you needRead More…

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23Feb/10

New features in development branch

February 23, 2010Newskamailio, openser, ser, sip routeradmin

A bit more than one month since first official release of branch 3.0 and the development branch includes lot of new features: seven new modules additions to pv, blst, uac, xlog andRead More…

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02Feb/10

Kamailio v1.5.4 Released

February 2, 2010Newskamailio, openser, ser, sip routeradmin

Kamailio v1.5.4 is out – a minor release of the branch 1.5, including fixes since v1.5.3 – configuration file and database compatibility is preserved… A new release in 1.5 series is out.Read More…

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02Feb/10

Kamailio v1.4.5 Released

February 2, 2010Newsadmin

Kamailio v1.4.5 is out – a minor release of the branch 1.4, including fixes since v1.4.4 – configuration file and database compatibility is preserved… A new release in 1.4 series is out.Read More…

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29Jan/10

FOSDEM 2010 Brussels

January 29, 2010Newskamailio, openser, ser, sip routeradmin

There will be a lightning talk about Kamailio (OpenSER) 3.0.0 on the main track at FOSDEM 2010, the annual meeting of free and open source developers. It is already a tradition thatRead More…

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18Jan/10

Siremis v1.0.0 Released

January 18, 2010Newskamailio, openser, ser, sip router, siremisadmin

Siremis v1.0.0 is out – web management interface for Kamailio (OpenSER) 3.0.0 A new version of SIREMIS Web Management Interface for Kamailio (former OpenSER) and SIP Router is available as v1.0.0. SiremisRead More…

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11Jan/10

Kamailio (OpenSER) v3.0.0 Released

January 11, 2010Newsadmin

Kamailio (OpenSER) v3.0.0 is out – major release with astonishing number of new features and improvements … On January 11, 2010, Kamailio (OpenSER) 3.0.0 has been released – this is a specialRead More…

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21Dec/09

VUC: Kamailio – Asterisk

December 21, 2009Newsadmin

Alex Balashov of Evariste Systems, active community member and contributer, running a VoIP consultancy business in USA, leads a VoIP User Conference about Kamailio, the role of Asterisk, the role of SERRead More…

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01Sep/09

Best of Open Source Software Awards 2009

September 1, 2009Newsadmin

Kamailio (OpenSER) winner at InfoWorld’s Best of Open Source Software Awards 2009, within category Best of Open Source Networking Software … InfoWorld has published the Best of Open Source Software Awards 2009.Read More…

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04Nov/08

The SIP Router Project

November 4, 2008Newskamailio, openser, ser, sip routeradmin

The sip-router.org project launched Nov 04, 2008 – join of Kamailio (OpenSER) and SIP Express Router (SER). The SIP Router Project aims to build a solid open source SIP routing platform, basedRead 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

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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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