Hello, I'm a former tier-2/NOC technician, I worked 10 years for a VoIP company in the US, I have built and troubleshoot many voip systems, mostly PBX such as Asterisk; I read your requirements, and I can build your dialler app and take care of all the necessary dial-plan as I have done this many times, but I see you require "Android" skills, is this generator supposed to be an Android app? Please contact me so we can confirm exactly what you need, and I can, and I can start working on this project for you right away. **10 days is deadline** most likely this can be done sooner, depending on your requirements.
Thank you!