[Asterisk-Users] RE: Voice calls sent to fax extension

[Julian Lyndon-Smith]

Surely once the call has been bridged the fax detection should turn off ?

Julian
Colin Anderson wrote:
> yes. Wind whistling in a car, female voices at a particular pitch and
> volume, fax machine running in the background of a voice call with the
> speaker on. It happens. Whether this is a problem or not depends on your
> pain threshold. I get a couple reports a week, which means that it actually
> happens ten times a couple times a week, so twenty times a week, and I
> process ~20K calls a week, so it happens to me .1 % of the time. Is this a
> problem for me? Nah. Is it a problem for you? Maybe - what's your pain
> threshold?
> 
> ps fwiw, this behavior will happen with any device that listens inline for a
> CNG tone, so it's not just an Asterisk thing
> 
> -----Original Message-----
> From: Paul A. Pringle [mailto:papringle at sep.com]
> Sent: Monday, June 26, 2006 8:54 AM
> To: asterisk-users at lists.digium.com
> Subject: [Asterisk-Users] RE: Voice calls sent to fax extension
> 
> 
> I thought it might be an inadvertent button press, but none of the keys
> (on my phone at least) are recognized by Asterisk as fax tones.  This
> has happened to two different users getting calls from different people
> using different equipment.  Does anyone else see this behavior
> occasionally?
> 
> Paul
> 
> -----Original Message-----
> Date: Fri, 23 Jun 2006 15:29:31 -0400
> From: "Bill Gibbs" <bgibbs at edurotech.com>
> Subject: RE: [Asterisk-Users] Voice calls sent to fax extension
> To: "Asterisk Users Mailing List - Non-Commercial Discussion"
> 	<asterisk-users at lists.digium.com>
> Message-ID:
> 	<BC4D33685C413A478FEC8BE36C4B810012B06D at eduro1.eduro.local>
> Content-Type: text/plain;	charset="us-ascii"
> 
> Maybe their fat jowls hit a few buttons on the keypad and sent the fax
> tone down the line and they didn't realize it?
> 
> Bill
> 
> -----Original Message-----
> From: asterisk-users-bounces at lists.digium.com
> [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of Paul A.
> Pringle
> Sent: Friday, June 23, 2006 2:51 PM
> To: asterisk-users at lists.digium.com
> Subject: [Asterisk-Users] Voice calls sent to fax extension
> 
> I have a situation that has repeated itself a few times.  Someone calls
> into Asterisk and is connected with a voice extension.  At some point
> during the call, the log shows "chan_zap.c: DTMF digit: f on Zap/2-1".
> At this point, the call is redirected to receive a fax and the Asterisk
> voice extension is hung up.  The users report that there were no
> noticable tones heard just before the cutover, so I'm not sure what's
> going on.  Is there a way to disable detection of faxes after the
> voicecall is initiated?  We're running a Digium card to convert our
> analog trunks if that makes any difference.
> 
> Thanks!
> 
> Paul
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