DTMF over IMS and the phone will always recieve it

IoT Modules LTE Standard Module
1

HI.
Are there a example when i should send DTMF tones over EC21. I couldn´t recieve any tones when my Phone have enable VoLTE. ( i have test with AT+VTS = “2343” I have Read that we could use RFC2833, but there are no example for that.

How can I fix that.

2

Hi
Can you use AT+QAUDCFG=“voltedtmfcfg” command to Adjust the DTMF audio time in volte mode.
like this AT+QAUDCFG=“voltedtmfcfg”,400,5000
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