Hey guys.  Has anyone else experienced the inability to detect/receive DTMF tones?  Just yesterday I had about 4-5 hours where One of my IVR scripts would not detect 1, 2 or 3, but detected the other digits perfectly.  If I removed the sound file that was playing, and substituted silence it worked, add the sound file in, and it broke.  I have a strong feeling that this is not an issue with FS, but with an upstream system.  But wanted to know if anyone has seen this before, and how they went about identifying the culprit and/or fixing it.

Some background:

- Using FS trunk

- Both legs of the call were via SIP gateway.

- Setting loglevel to 9 (console and sofia) showed that the RTP packets were not received by FS for 1/2/3 but were received for other digits

- Both legs of calls were to/from ATT cell phones

-  Was using session:setInputCallback() to receive tones, did not test with playAndGetDigits()

Thanks for any help.

-pete