Hey I have an issue where by I am sending the DTMF tone but I can’t hear it on the browser but console log shows the dtmf tone is sent, any ideas how I can resolve this?
I’m not sure you’ll be able to hear them in the audio, as they’re sent as a separate payload type (RFC 4733) and not encoded in the audio stream.
hmmm could there be a work around it 
I suggest to read this MDN article and it might get much clearer:
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Thanks Mirko let me give that a try 