opensips  3.2.3
About: OpenSIPS is a multi-functional, multi-purpose signaling SIP Server (Session Initiation Protocol). It can act as SIP Router/Switch, SIP Registrar, Application Server, Redirect Server, Load Balancer / Dispatcher, Back-to-Back User Agent, Presence Server, IM Server, Session Border Controller, SIP Front-End, NAT traversal Server, IP Gateway (SMS, XMPP) and others.
  Fossies Dox: opensips-3.2.3.tar.gz  ("unofficial" and yet experimental doxygen-generated source code documentation)  

opensips Documentation

Some Fossies usage hints in advance:

  1. To see the Doxygen generated documentation please click on one of the items in the steelblue colored "quick index" bar above or use the side panel at the left which displays a hierarchical tree-like index structure and is adjustable in width.
  2. If you want to search for something by keyword rather than browse for it you can use the client side search facility (using Javascript and DHTML) that provides live searching, i.e. the search results are presented and adapted as you type in the Search input field at the top right.
  3. Doxygen doesn't incorporate all member files but just a definable subset (basically the main project source code files that are written in a supported language). So to search and browse all member files you may visit the Fossies opensips-3.2.3.tar.gz contents page and use the Fossies standard member browsing features (also with source code highlighting and additionally with optional code folding).

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Welcome to OpenSIPS Project


OpenSIPS is a GPL licensed SIP server implementation. It started as a fork of Fokus Fraunhofer SIP Express Router (SER) project. OpenSIPS wants to be a more open project, not only from license point of view, but more open as project management, especially for external contributions.

OpenSIPS wants to overcome the development latency of current SER project, to ensure a shorter path into a release for new added features. OpenSIPS is a project maintained by OpenSIPS Solutions by a team including core and main developers of SER project.


For information regarding the OpenSIPS installation, please see the INSTALL file.

For current developers/contributors of this project, see the CREDITS and AUTHORS file. For complete license information, please see the COPYING file. For a quick overview of OpenSIPS modules, please see the README-MODULES file.


Documentation about each module can be found in the README file in each module directory. For online documentation, please see

For additional documentation, tutorials and examples please see also


For any question related to the OpenSIPS usage, please use the public mailing list.

For questions regarding the development of OpenSIPS - like contributions, bug reports, etc - please use the public mailing list.

For questions regarding businesses around OpenSIPS - like products,· consultancy, trainings, etc - please use the public mailing list.

Also there is a generic news mailing list where you can learn about what is· new or important for the OpenSIPS project, about alerts and updates regarding relaces and about events around the project.