I've been using one of the popular asterisk ISO distributions for a couple of years and DTMF had always worked. I recently switched to another asterisk ISO distribution, and outbound DTMF is no longer working. After doing a bit of digging, I noticed that the new distribution wasn't setting any sort of dtmfmode at all, anywhere. The old distribution had rfc2833 set in sip.conf for the phone extensions, so I thought I'd set the dtmfmode and see if that helped. Unfortunately, it did not. I then went ahead and set dtmfmode=inband in sip.conf and iax.conf for the phones and trunk to provider, respectively. At that point, I was finally able to hear DTMF tones when I called out to my cell from my 7960 but they still weren't enough to trigger the menu of an IVR outside of the * system. Jitterbuffer is disabled on the IAX trunk to the provider. DTMF seems to work fine from the phone to *, because I can trigger menus on my own IVR without a problem. I don't specifically recall the minor, but I know the old asterisk distribution major was 1.2. Maybe the minor was high 20s, 30s. Who knows. The new distribution is 1.4.23.1. I upgraded my 7960 from 8.6.0 to 8.11.0 with the transition to the new distro, so perhaps that's an issue. (FTR, my call path is: SIP from the phone (7960) to *, IAX from * to the provider.) Any ideas?