Hello, I'm a voip specialist with over 10 years of experience working on the TS/NOC departments of a US voip company; I can install, troubleshoot and customize many VOIP devices including: softphones, ATAs, IP-phones and PBX systems like Asterisk/FPBX. I read your project description and I have built many custom solutions using Asterisk, python, php, etc; I'm free through chat to discuss your project further.
Thank you.