[Freeswitch-users] Fax processing not successful - result (48) Disconnected after permitted retries

[afshin afzali]

Steve,

Thank you very very much :)
I'll inform you of the result.

Best,
 Afshin

On Wed, Jul 18, 2012 at 5:31 PM, Steve Underwood <steveu at coppice.org> wrote:

> On 07/18/2012 07:48 PM, afshin afzali wrote:
> > Hi Steve,
> >
> > I don't think that my problem relates straightly to the time that a
> > fax takes to be received. In some cases I could get better result to
> > decrease fax speed (normally causes longer time). Let me tell you my
> > today case. There is a tabular document that I could receive from a
> > Panasonic fax machine and the same time unable to receive that from a
> > Canon machine. Although I'm receiving other (simpler than) documents
> > from the Canon one !
> A huge number of Canon machines have a broken V.29 modem, which produces
> such a poor signal you are lucky if other machines can decode it. The
> only real difference a complex image makes is the amount of data. This
> has only two effects:
>       - Obviously it takes longer.
>       - In ECM mode, if the image exceeds 64k it will be sent in 64k
> blocks, with error correction between each block.
> If your Cisco is running software more than a couple of years old, its
> T.38 engine may be horribly broken. It seems that had so much trouble
> with it, they tossed it out and put a complete replacement in there. The
> new one usually works well.
> >
> > I've tested various configurations on my 5350 device of modifying fax
> > rate, ls_redundancy and hs_redundancy but could not managed to fix this.
> >
> > Afshin
> >
> > On Wed, Jul 18, 2012 at 4:00 PM, Steve Underwood <steveu at coppice.org
> > <mailto:steveu at coppice.org>> wrote:
> >
> >     On 07/18/2012 06:54 PM, afshin afzali wrote:
> >     > Hi,
> >     >
> >     > There are some inbound fax sessions which I got error code 48
> >     (and in
> >     > some cases 49).
> >     >
> >     > FreeSWITCH Version 1.0.head (git-54ddef0 2011-12-06 21-53-45 -0600)
> >     > AS5350XM Voice / Fax ( T.38 ) Gateway
> >     >
> >     > I've noticed that this error appears in cases which there are
> >     complex
> >     > documents (graphics or gray areas).
> >     > appreciate all comments !
> >     If you have graphics, the pages generally take a lot longer to
> >     send. It
> >     is not uncommon for T.38 gateways to have stupidly short timeouts,
> >     which
> >     will cause a call to drop after a page has been in progress for
> >     just one
> >     minute, or one and a half minutes. Could that be your problem?
> >
> >     Steve
> >
>
> Steve
>
>
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