DTMF tones

[VOIPoTim]

Support had put me on these settings before you posted them and I am still hearing the tones. Oh, and I have rebooted the ATA several times.

Out of curiosity, how long have you had STUN on? Depending on the network setup in some cases STUN can force the audio to be routed directly instead of being proxied regardless of what we set it to do.

Has it always been enabled or was it enabled around the time this started?

If STUN wasn't on for a reason, let's try disabling it (and rebooting) and see if that solves it since it being disabled will make sure the audio preference is followed.