I'm curious about your recommendation to use a long (600 sec) media/RTP timeout value in the sofia profile.  Is this a specific need for the Audiocodes device or just generally better for T.38?  I'm assuming you are referring to the "rtp-timeout-sec" parameter? 

I'm using FreeSwitch as a media proxy to a T38 provider and have had decent success, but usually have problems with longer faxes (8+ pages) and am wondering if this setting might help?

Thanks,

Dave Redmore

----- Original Message -----
From: "Kristian Kielhofner" <kris@kriskinc.com>
To: "FreeSWITCH Users Help" <freeswitch-users@lists.freeswitch.org>
Sent: Tuesday, November 16, 2010 9:39:22 AM GMT -06:00 US/Canada Central
Subject: Re: [Freeswitch-users] T.38 and Audiocodes or Patton gateway

Tim,

  I've have good experiences with the MP-20x series using T.38 with FreeSWITCH.

  On the AudioCodes:
  Make sure your T.30 and T.38 redundancy settings are at least "1".
  Make sure ECM is disabled.
  Use the latest 2.6 firmware (not 3.x).

  In FreeSWITCH:
  Make sure ECM is disabled.
  Make sure to have a very high (600 seconds seems ideal) media/rtp
timeout parameter on the Sofia profile for the AudioCodes device.

  On the fax machine:
  Make sure ECM is disabled.
  Disable Super G3 or anything higher than 14.4.

On Mon, Nov 15, 2010 at 1:08 PM, Tim St. Pierre
<fs-list@communicatefreely.net> wrote:
> Hello,
>
> I am trying to get a reliable fax setup working.
>
> I have set up a nice fax receiver mechanism with mod_spandsp and it works very well when I send a
> fax using a Linksys SPA2102
>
> I have poor results with Audiocodes MP202B, and can't get anything to work with a Patton M-ATA
>
> I have a number of Audiocodes MP202B in service and would rather not replace them if I can avoid it.
>
> In each case, the fax fails with "communications error" on the sending machine, and "Call hungup
> prematurely" on the SpanDSP side.
>
> There aren't too many knobs on the gateways.  Are there any knobs in mod_spandsp that might help
> this condition?  Anyone else have any experience with these devices?
>
> Thanks!
>
> -Tim
>
> _______________________________________________
> FreeSWITCH-users mailing list
> FreeSWITCH-users@lists.freeswitch.org
> http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
> UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
> http://www.freeswitch.org
>



--
Kristian Kielhofner
http://www.astlinux.org
http://blog.krisk.org
http://www.star2star.com
http://www.submityoursip.com
http://www.voalte.com

_______________________________________________
FreeSWITCH-users mailing list
FreeSWITCH-users@lists.freeswitch.org
http://lists.freeswitch.org/mailman/listinfo/freeswitch-users
UNSUBSCRIBE:http://lists.freeswitch.org/mailman/options/freeswitch-users
http://www.freeswitch.org