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After check with carrier, the DTMF is out-of-band RFC 2833 and the RTP payload type 101, kindly see the attached file.
And after put the DTMF method in cloud RTP Event, it never work, but when change to In-band Audio or none some times work but after delay, thank you so much
By default Genesys Cloud trunk is also set to use RTP Events (RFC2833 out-band) with payload type 101 (but it can also carry 102 e.g. when you're using opus as a codec) as a DTMF method. If you didn't change that I would suggest to keep that same in your gateway and after doing a test call look into the captured Wireshark. There you should find the related info in SDP offers and RTP packets.
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