[Asterisk-Users] DTMF Talk off

[Doug Crompton]

Check....


http://lists.digium.com/pipermail/asterisk-users/2005-January/078141.html

On Sun, 18 Jun 2006, John Millican wrote:

> Hello all,
> I have seen some chatter again about DTMF.  I see most of the talk about DTMF
> around not being able to get an external IVR to recognize digits, not a big
> issue for me at this time but sill interesting.  My issue though, is with
> talk off on a zap channel.  It seems to be getting worse or maybe my patience
> is thinning.  All my calls go out and come in pstn through an FXO as I do not
> have high speed available here at home.  My Current setup is:
>
> Phone-->PAP2--> * --->PSTN--->Voip number to * at another location(that has
> high speed)--->send to VoIP provider
>
> I read a post about talked about the length of the DTMFish sound.  I also
> remeber seing something about relaxdtmf being set to something other than yes
> or no, so I looked in chan_zap.c and found  relaxdtmf in many places but it
> looked to my inexperienced eye that it could only be set to 'yes' or 'no',
> but i did find some mention of tonlength (at line 10858)
> followed that to zaptel.c (line 3357) where it said :
> if ((tdp.dtmf_tonelen > 4000 ) || (tdp.dtmf_tonelen < 10 ))
>     return -EINVAL
> Which I am guessing means unless the dtmf is between these 2 values ignore it.
> Any ideas what might happen if i increased the minimum time value? if this is
> indeed what this is referring to?
>
>
> Zapata.conf:
> [channels]
> callwaiting=yes
> callwaitingcallerid=yes
> threewaycalling=yes
> transfer=yes
> cancallforward=yes
> busydetect=yes
> busycount=6
> echocancel=128
> echocancelwhenbridged=yes
> echotraining=yes
> rxgain=0
> txgain=0
> immediate=no
> context=default
> signalling=fxs_ks
> channel => 1
> <same for channel 2>
>
> zaptel.conf:
> loadzone = us
> fxsks=1
> fxsks=2
>
> extensions.conf:
> exten => s,1,  NoOp(${CALLERID} time ${DATETIME});
> exten => s,2,  Dial(sip/677&sip/666,30,tT);
> exten => <a bunch of stuff to do with agi look ups and voicemail
> leave/retrieve>
>
> All very basic and works like a charm except for the talk off.
> Thanks in advance to all,
> John M
>
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"Those that sacrifice essential liberty to obtain a little temporary safety
 deserve neither liberty nor safety."  -- Ben Franklin (1759)

****************************
*  Doug Crompton	   *
*  Richboro, PA 18954	   *
*  215-431-6307		   *
*		  	   *
* doug at crompton.com        *
* http://www.crompton.com  *
****************************