DTMF generate and decode

IoT Modules GSM Module
1

Hi
I trying to generate DTMF direct from the M95F module in a voice call, I’m using the AT+QWDTMF command, I have tried with all 3 audio channels but I never heard the DTM tones in the other side…

Any suggestions?

Thanks,

Danilo

2

Dear Logicafago,
Thanks for your inquiry in Quectel forum.
Please make sure whether your setting is the same as the following recommendation. You also can get more information from the document of GSM DTMF Application Note. Thanks!

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