Hello, I'm a voip specialist with over 10 years of experience working on the TS department of a US voip company; I can install, troubleshoot and customize many voip devices, including softphones, ATAs, IP-phones and PBX systems like Asterisk/FreePBX. I read your project description and I can help you connecting JIO with FPBX. I'm available through chat to discuss your project further, and get started.
Thank you.