I dont know if it will work or not but have you tried setting each card up with different gains? 
 
I am not sure if the variables are global or not, but when I installed an FXO card on an [EMAIL PROTECTED] box and used genzaptelconf, it created a separate file for the FXO with its own rx settings and was included in zaptel.conf.
 
 
----- Original Message -----
Sent: Monday, September 26, 2005 7:28 AM
Subject: Re: [Asterisk-Users] Can't receive Faxes with Asterisk (help)

I have already to the highest volume. I have tried with different phones models and the same results...

On 9/26/05, Steve Totaro <[EMAIL PROTECTED]> wrote:
Turn up the volume on your phones?
----- Original Message -----
Sent: Monday, September 26, 2005 6:12 AM
Subject: Re: [Asterisk-Users] Can't receive Faxes with Asterisk (help)

 
Hi, 
   Yes, I have changed it. I tried as you have done, I put txgain and rxgain to "0" and it was possible receive and send faxes. I'm using two TDM400P (FXS with 4 ports and FXO with 4 ports). In my tests I'm sending faxes to asterisk from fax machine connected to one of the FXS ports.
The problem is, if put tx and rx gain to 0 in the conversations coming from FXO channels hear very very low.
What can I do then, any idea ?
 
 
 
On 9/23/05, Chris <[EMAIL PROTECTED]> wrote:
  Are you trying through Zap channels?
Have you changed the RXGain or TXGain?

   I can send faxes if I use RXGain= 20.0 but I can not receive unless I
have the RX and TX set to 0.



Chris

----- Original Message -----
From: < [EMAIL PROTECTED]>
To: < asterisk-users@lists.digium.com>
Sent: Friday, September 23, 2005 2:15 PM
Subject: [Asterisk-Users] Can't receive Faxes with Asterisk (help)


> Hi,
>    I have an Asterisk CVS-HEAD-08/29/05-13:21:43 built on a Redhat 9.
> I have problems to receive faxes with spandsp-0.0.2pre11 and
> libtiff-3.5.7-11.
> I'm trying with a fax machine Panasonic KX-FT25, 14.4Kbps modem speed.
> I have tested sending a Fax document from Asterisk to the fax machine,
> it is working fine, but when I try to receive with asterisk, I receive
> transmission error on the fax machine side.
>
> my extensions.conf
>
> exten =>301,2,Background(mp)
> exten =>fax,1,RxFax(/home/admin/testfax.tif)
>
> and I have tried with as well. Press * star on the fax machine and
> after hear the fax tone press the start button to send the document.
>
> exten =>301,2,Background(mp)
> exten =>*,1,RxFax(/home/admin/testfax.tif)
>
> Can somebody help me ?


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