In my application, I register a DMCC extension, start a monitor for DTMF on that extension and then call another extension, play a recording and take some action based on what DTMF tone I receive. A customer site is reporting that when their extensions answer the call and press a DTMF digit nothing happens. In looking through my logs I am not receiving any tone detected events. I do sometimes see the event, but very rarely compared to the number of times that I should be seeing them according to the customer. Any thoughts on what could be happening here?

Thanks,
Ben