Re: Pulse to DTMF Here's an expensive option:
https://www.amazon.com/Converter-Antique-Rotary-Telephone-Modern/dp/B00DUDAR5M Hopefully the other one is cheaper? Or - build your own? https://www.mattmillman.com/projects/building-your-own-pulse-to-tone-converter/ Andrew L. Ayers Glendale, Arizona phoenixgarage.org github.com/andrew-ayers
