Telephone Central Office Re-Design with ESP32 Begins

[@CAXRAMEDIA]

I am interested, how to decoding Call Progress using esp32 without extra ic tone decoder eg. cmx673, cmx683, and so on

[@gadgetsideload]

Goertzel algorithm libraries might be able to decode the frequencies in the audio but I’ve never tried it and some people have found it to be inconsistent. Maybe if the chip is doing too many other things it could be even less reliable to the point where you need a separate chip anyway. www.hackster.io/MM_Shoaib/dtmf-decoder-using-only-arduino-872502

[@CAXRAMEDIA]

@@gadgetsideload I have successfully detected DTMF with Goertzel. However, for Call Progress, I still depend on CMX673, I would be very grateful if you could create a library to detect Call Progress Tone, especially to detect Bussy Tone, and Hello Voice :-)

[@CAXRAMEDIA]

@@gadgetsideload kzbin.info/www/bejne/pqqZpoewj5Vqn6Msi=AyFb04gPjdhGzUfz

[@OTRBRANDON]

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