asterisk users - Jun 2006 - TDM Fax Problems

I am running into errors in faxes received by my * server that I route to
fax machines on a channel bank. I have a channelized T-1 coming in and I
take certain channels and transfer them to channels on my channel bank. The
T-1 and channel bank are on a Sangoma A104D 4 port with echo canceling. The
faxes tend to have problems with sections of the transmission getting
garbled or lost. Does anyone have any information on why this might be
happening or how to fix it?

-- 
Bruce
Nortex Networks
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Turn off echo can for those calls.

 

________________________________

From: asterisk-users-bounces@lists.digium.com
[mailto:asterisk-users-bounces@lists.digium.com] On Behalf Of Bruce
Reeves
Sent: Monday, June 12, 2006 10:55 AM
To: Asterisk Users Mailing List - Non-Commercial Discussion
Subject: [Asterisk-Users] TDM Fax Problems

 

I am running into errors in faxes received by my * server that I route
to fax machines on a channel bank. I have a channelized T-1 coming in
and I take certain channels and transfer them to channels on my channel
bank. The T-1 and channel bank are on a Sangoma A104D 4 port with echo
canceling. The faxes tend to have problems with sections of the
transmission getting garbled or lost. Does anyone have any information
on why this might be happening or how to fix it? 

-- 
Bruce
Nortex Networks 

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Thanks Damon, I have now turned off all echo cancelation on both the lines
coming in for fax and the channels to the channel bank that have fax
modems/machines. The fax is clearer, but not as clear as it was prior to *.
I have an error showing up of  WARNING[2465]: chan_zap.c:3925
zt_handle_event: Ring/Off-hook in strange state 6 on channel 55 when the
call is bridged between the fax modem on 6 and the T-1 on 55, or any
combination of ports. Are there any other solutions or possible causes?

On 6/12/06, Damon Estep <damon@suburbanbroadband.net>
wrote:
>
>  Turn off echo can for those calls.
>
>
>   ------------------------------
>
> *From:* asterisk-users-bounces@lists.digium.com [mailto:
> asterisk-users-bounces@lists.digium.com] *On Behalf Of *Bruce Reeves
> *Sent:* Monday, June 12, 2006 10:55 AM
> *To:* Asterisk Users Mailing List - Non-Commercial Discussion
> *Subject:* [Asterisk-Users] TDM Fax Problems
>
>
>
> I am running into errors in faxes received by my * server that I route to
> fax machines on a channel bank. I have a channelized T-1 coming in and I
> take certain channels and transfer them to channels on my channel bank. The
> T-1 and channel bank are on a Sangoma A104D 4 port with echo canceling. The
> faxes tend to have problems with sections of the transmission getting
> garbled or lost. Does anyone have any information on why this might be
> happening or how to fix it?
>
> --
> Bruce
> Nortex Networks
>
> _______________________________________________
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-- 
Bruce
Nortex Networks
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