Daniel-Constantin Mierla and Elena-Ramona Modroiu, members of ASIPTO team and co-founders of OPENSER SIP Server released the OPENSER Devel Guide – a tutorial aimed to help the developers writing extensions for OPENSER SIP Server.

The document approaches 14 key components of OPENSER, giving the kick-start guidelines, examples and references in the code. It reveals how to extend OPENSER functionality with new pseudo-variables, transformations, MI commands, core parameters and functions, statistics and modules.

Hopefully, the tutorial will make easier the understanding of OPENSER SIP Server internals, attracting new people in the development process, with new code or improvements to existing code.
The guide is available at:

http://www.asipto.com/pub/openser-devel-guide/