Welcome to Kamailio (OpenSER) – the Open Source SIP Server
Kamailio (former OpenSER) is an Open Source SIP Server released under GPL, able to handle thousands of call setups per second. Among features: asynchronous TCP, UDP and SCTP, secure communication via TLS for VoIP (voice, video); IPv4 and IPv6; SIMPLE instant messaging and presence with embedded XCAP server and MSRP relay; ENUM; DID and least cost routing; load balancing; routing fail-over; accounting, authentication and authorization; support for many backend systems such as MySQL, Postgres, Oracle, Radius, LDAP, Redis, Cassandra; XMLRPC control interface, SNMP monitoring. It can be used to build large VoIP servicing platforms or to scale up SIP-to-PSTN gateways, PBX systems or media servers like Asterisk™, FreeSWITCH™ or SEMS.
- Kamailio and SIP Express Router (SER) teamed up for integration of the two applications and new development. As result, starting with version 3.0.0 there is one application and a single source tree that incorporates all the features of the two projects plus new additions.
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- October 18, 2011 – Kamailio (OpenSER) – New Major Version v3.2.0 Released. - Latest minor release in this series is v3.2.1
- September 01, 2009 – Kamailio awarded Best Open Source Networking Software 2009
- November 04, 2008 – Kamailio (OpenSER) and SIP Express Router (SER) teamed up to build the SIP Router project
- July 28, 2008 – due to trademark issues, OpenSER was renamed to Kamailio. Click here to listen the new name jingle
Development site (SVN source code repository, bug tracker) is hosted since 2005 by SourceForge.net for Kamailio (OpenSER) 0.9.4 up to version 1.5.x, at:
Kamailio 3.0.0 and greater use since 2009 the SIP Router Project server to host the tracker and GIT source code repository:
Kamailio can be used on systems with limited resources as well as on carrier grade servers. It is written in pure C for Unix/Linux-like systems with architecture specific optimizations to offer high performances. Kamailio Project aims to be a collaborative environment of its users to develop secure and extensible SIP server to provide modern Unified Communication and VoIP services.
