I have used both Record and Monitor Function to record the tone being played in callers mouth piece. This tone is a DTMF tone and I have this in a wave file in my PC. And I put the mouth piece of caller(myself) in front of the speaker to record this tone using asterisk. The problem is the asterisk (Monitor and Record function) do not record the tone. But when I speak anything myself, that is recorded without any noise. Can anybody please help me in this regard. Why the tone is not being recorded (or if recorded, then it is not proper, we can hear breaks in the tone but these breaks are not in the actual file).