[asterisk-users] Volume events causing talk off on Asterisk with Digium 411P

[Servetas, Andrew]

We are experiencing random talk off events when we hear a loud volume
event on the PSTN side of our calls.  We do not always hear the spurious
DTMF, but I can see it in the console when I have the debug and verbose
levels turned up.  We do however always have the associated brief
periods of silence that immediately follow.  Sometimes they are only a
matter of seconds, other times they can be as long as a minute.  We hear
it most often if the remote party is on a cellular phone with a lot of
background noise, or if a loud noise happens during the call.  Neither
party can hear the other when this happens.  It almost reacts like an
AGC circuit is muting the call.

 

We are using a Digium TE411P quad-span T1 card on 1.2.5.  I called
Digium support and we have played with the VPM_DEFAULT_DTMFTHRESHOLD in
the WCT4XXP.C driver as recommended, and all the RELAXDTMF and GAIN
settings in Zapata.conf are set according to their recommendations.

 

Has anyone else experienced this, and if so, what have you done to
correct it?

 

Andy Servetas

CTI Support Engineer

  

Dirigosoft Corporation

Portland, ME

 

www.dirigosoft.com <http://www.dirigosoft.com/>   

 

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