About

Kamailio (OpenSER) is released from SIP Router Project source tree, as a result of collaboration work started on November 4, 2008. To understand the meaning of Kamailio (OpenSER) in SIP Router project context see SIP Router Releases and Kamailio SIP Router Releases pages.

As an application, Kamailio (OpenSER) is released under GNU Public License v2 (GPLv2). Beginning with 3.0.0, the application includes parts of code under BSD license that can be used such as individual components.

Kamailio (OpenSER) can be:

  • SIP proxy server
  • SIP registrar server
  • SIP location server
  • SIP application server
  • SIP dispatcher server
  • more detailed list of capabilities is available in features page

Kamailio (OpenSER) cannot be:

  • SIP phone
  • media server
  • back-to-back user agent

Get involved

We invite individuals, academic institutes or companies to actively take part in the development of the project. It is not only about writing C code, you can help with:

  • code development – core, modules and adjacent applications
  • documentation – writing or enriching documentation
  • miscellaneous – different management tasks (e.g., web site maintenance)
  • ideas – new ideas bring brilliant solutions

Join the mailing lists, start using and contributing to the SIP server.

Evolution of the project over the time is summarized in History page.

You can get in contact with developers via public mailing lists and web forum.