I have been working on a trouble call for a while now. I have a customer with a 1-800 number call in, then he has to enter his pin number to get access. When I call this number from any phone it rings into the 1-800 number recording and prompts me to enter my pin number. But thats the whole thing, I enter my pin number and it is like it doesn't hear it, it just asks me again and again to enter my pin number. It is like it doesn't hear my DTMF. I can call from my cell phone and it works fine with hearing my DTMF, so I know the pin number is correct. I also can call a different 1-800 number with a phone tree and it responds to my DTMF fine. Any ideas, and I mean any are welcome. I'm lost.