[Asterisk-Users] Silencing Background App during touch tone detection

[Brian West]

Post your config and we can see whats up..

bkw

On Fri, 6 Feb 2004, Mark Farver wrote:

> We're still have problems with the outgoing voice message interfering
> with the touch tone detection.  Often the first touch tone pressed will
> be detected twice.  If I configure asterisk to not play the message, or
> if people wait till the outgoing message stops, it works flawlessly.
>
> I've noticed that many phone system silence the outgoing message once
> you start pressing buttons, is there anyway to configure asterisk to do
> the same?
>
> My C skills are non-existent, but the touch tone detection code in the
> zaptel libraries appears to work this way (apologies for basic like
> syntax):
>
> start:
> Wait for tone detected
> waiting:
> wait ~250ms
> still hearing tone?
>   Yes, goto waiting
>   No.. Add that tone to the queue, goto start
>
> In the above a short dropout that falls exactly on one of the 250ms
> checks would be detected as a break, even is it was only a few ms long.
>
> In my experience TT detection system work more like this, require a
> minimum length of silence/no Touch tone (100-250ms) before advancing to
> detecting the next number:
>
> start:
> wait for tone detected
>
> waiting:
> wait 250ms
> still hearing tone?
>   Yes, goto waiting
>   No..
>     wait 100-250ms,
>     Still no tone?
> 	yes,  add current tone to queue and goto start
>         no, ignore silence, and goto waiting
>
> Thanks
> Mark Farver
>
>
>
>
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