OpenVBX Selective Phone Call Blocking/Rejecting
A few years ago I created a software plugin for the OpenVBX/Twilio system that allowed someone to add phone numbers to a block list so that they would not be charged when an unwanted caller called their line. This plugin did not require any external resources outside of OpenVBX; it was self-sufficient, unlike other similar plugins available. I once charged for this plugin, but now I just don’t have time to support it so I’m offering the code for free, without any support.
There is a guide that goes over how to use the plugin on my other website.
Again, no support or warranty comes with this plugin so use at your own risk.