Write an AGI - How do I?

AGI stands for Asterisk Gateway Interface, and much like CGI scripts used throughout the Internet, a custom-AGI brings additional (almost unlimited) configurability to your PBXtra . 

You can find the full API for AGI scripting within our KB:
FON Script Interface

Note that AGI scripting help/troubleshooting is not covered by Support.  Requests such as 'Teach me how to write my own script' or 'Help me debug my AGI' are not covered by the Annual Support and Maintenance Agreement.  Fonality Support will not help you create, debug, modify, backup, or otherwise manipulate code using the FON Script Interface.