Greg,
How fast is fast? The DTMF detector is tested at the maximum specified rate - 10 digits per second - and gives no problems. Some systems do not control the rate properly, and allow the gaps between tone pulses to be completely eliminated. This contravenes the spec., and does not work. The detector is lifted from my spandsp library. You can download and try that yourself. It contains a full test suite for the DTMF decoder :-)
Steve
Greg Smith wrote:
Using inband DTMF signaling, our Asterisk server fails to pass DTMF when it is entered rapidly by a caller. For example, when a phone number is entered, if it is entered slowly (a brief pause between each number) Asterisk is fine. However, if the ten digits are entered quickly, Asterisk drops digits.
Thanks.
Greg
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