[asterisk-biz] Double DTMF (Fixed it)

[Andrew Joakimsen]

In my ATA there is an option "Suppress voice packets during RFC2833
 Telephone Event packet transmission" Enabling this option fixes the
dual DTMF issue.

If you are using G711 codec you could also disable RFC2833/SIP INFO
DTMF which would cause asterisk to do the detection.

Basically the issue is that asterisk will still do in-band DTMF
detection even when it gets an RFC2833 DTMF payload.