You would need certain VoIP platform features not available in the OPENSER SIP server, but you want to avoid delays introduced by self training of your people for coding them.
There is now the possibility to ask for a core-developer of the open source project to do this task for you in the shortest time possible, having also the guarantee of optimal solutions.
Our management team, made up of two OPENSER SIP Server project co-founders, committed to offer best development services on open source SIP server.
ASIPTO is offering training courses for OPENSER SIP Server extension development. It is the shortest option to write new functionalities by yourself and be sure you do it right, using at maximum the internal API.
For more details, please contact us.