I have an Obi110 connected to a PSTN line and registed as a trunk in FreePBX. Everything rings and connects correctly but DTMF tones are not being passed through to my FreePBX IVR. I have tried changing the DTMF settings in the ITSP profile to auto, inband, and RFC2833. I have also togled the "X_usefixeddurationrfc" with all three. Nothing works and no tones are passed through. If I answer the call and the caller press keys, I DO hear VERY short chirps. They are so short they are barely audible.
