[Asterisk-Users] Re: DTMF Talk off

[Matt King]

With recent versions of *, you can increase the detection time in 
zapata.conf with the toneduration variable.

The default setting is:

toneduration=100

We had the same problem and solved it by increasing this to 200. 

You can also increase the threshold volume for detection of DTMF by 
setting VPM_DEFAULT_DTMFTHRESHOLD in the relevant zaptel wctXXXXX.c and 
recompiling (though if you increase this too much you risk losing your 
ability to detect DTMF at all).

Hope this helps,

    Matt.