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

[Servetas, Andrew]

Yes, it seems to be happening on any call that passes over the T1 card.
SIP-to-SIP works fine.


Date: Thu, 07 Sep 2006 10:36:24 +0300
From: Zoa <zoachien at securax.org>
Subject: Re: [asterisk-users] Volume events causing talk off on
	Asterisk with	Digium 411P
To: Asterisk Users Mailing List - Non-Commercial Discussion
	<asterisk-users at lists.digium.com>
Message-ID: <44FFCBF8.2020908 at securax.org>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed

I have the same problem on on of our systems, but i always thought it to

be a problem in the ATA's connected to this server.
(My customer has a lot of traffic on the lines and only sometimes hears 
this problem).

It seemed to happen especially with loud woman voices, but i was unable 
to reproduce it on command.
I have several other te410p's on different locations (with different 
carriers), without those complaints.

Does this also happen on pri to pri calls for you ?

Maybe its a combination of carrier volume with the te410p ?

Zoa

Servetas, Andrew wrote:

>  
>
> 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/> 
>
>  
>