We have a case where some users with cellphones have an issue with HMP (using in-band DTMF detection) where not all the digits they key in are detected
I have a wave file capture and did an analysis on the the digits. (wave file is attached to this post)
A frequency analysis shows the DTMF dual tones are correct frequencies.
The duration on the tones is about 80 milliseconds which I believe is well within the Dialogic HMP qualification templates.
I did notice a bit of a click/pop just prior to each digit but I wouldn't expect that that would cuase detection issues
I cannot understand why HMP cannot reliably detect all digits that these users key in.
Any one have any idea whay HMP has a problem with these digits?