My set up is fs(g711) => cisco (e1 pri) => pstn. and I'm not using t38. If you see my pastebin link it seems some timer is causing sofia to send bye message and causes the call to drop.

On Sun, Oct 28, 2012 at 11:35 PM, Mitch Capper <mitch.capper@gmail.com> wrote:

Hi Babak,
Check the wiki for the suggested methods to try for faxing also
provider can make a big difference. Let us know what you have tried
/are doing.
~mitch

On Sun, Oct 28, 2012 at 11:45 AM, Babak Yakhchali
<babak.freeswitch@gmail.com> wrote:
> Hi
> Sending faxes results in dropped calls: "The call dropped prematurely"
> http://pastebin.freeswitch.org/20133
>

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