Hi,
I have been working with Cisco VoIP since 2001 and Asterisk and freepbx ,trixbox, elastix since 2007.
I have developed quite a few custom dial plans during this time and would like to help you out as well.
I would need access to your demo server (both ssh and web ).
kindly let me know if we can have a little chat about your project to better understand the needs of the project.
regards,