https://www.dialgizmo.com/
DialGizmo - Pulse to Tone converter for VoIP lines changes decadec dialling to touch tone
The Dialgizmo pulse to tone converter box allows you to use any old rotary pulse dial phone on modern telephone systems including VoIP lines. DialGizmo has...
pulse to tone converter
https://hackaday.io/project/28557-pulse-to-tone-converter
Pulse to Tone Converter | Hackaday.io
Converts pulse dialing of your POTS telephone to DTMF dialing allowing you to use it with your VOIP's FXS-port.
pulse to tone converterhackadayio