Detect duration of a DTMF key press?
Q: Here’s the scenario, I am planning to use SIP phone to connect asterisk local extension number where it will connect me to my agiserver. My agiserver(written in java) as of now can detect and prints dtmf tones but not the dtmf done by prolonged key pressed. A: As of Asterisk 1.4, if you use RFC2833-generated DTMF, then it is possible. It would also be possible in any version with inband DTMF (which requires ulaw or alaw). All other cases, it is only possible to know that the event occurred, not how long the event lasted.
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