[Asterisk-Users] RxFAX generates no tiff file

[Darren Nickerson]

Steve,

We have no frame slips, so we probably have a frame slip problem ;-)

This may be plaguing us on our faxing. Gain and echo cancelation (ie: none)
are all approximately correct, and yet still we cannot get reliable faxing
through the POTS lines plugged into our FXO card on the Adit (whereas we can
fax well when using the POTS lines directly). Faxing T1 -> T1 via a TE405P
works well, ... it's only when we try to use the connection to the Adit (24
fxs_ks channels in a T1) that things go horribly wrong.

Is there any sure-fire way to detect frame slips? I see a counter for IRQ
misses with zttool, but that's all. In my Adit600 I see lots of measures of
errors (line errored seconds, controlled slip seconds, bursty errored
seconds etc) but they're all zero.

Am I missing an obvious way to detect./observe these events?

-Darren

--
Darren Nickerson
Senior Sales & Support Engineer
iFax Solutions, Inc. www.ifax.com
darren.nickerson at ifax.com
+1.215.438.4638
+1.215.243.8335 (fax)

----- Original Message ----- 
From: "Steve Underwood" <steveu at coppice.org>
To: <asterisk-users at lists.digium.com>
Sent: Sunday, May 23, 2004 8:03 PM
Subject: Re: [Asterisk-Users] RxFAX generates no tiff file


> Hi Petr,
>
> For most people who are sure they have no frame slips, the problem
> usually turns out to be frame slips :-)
>
> If you are *really* sure you do not have frame slips, then uncomment the
> first line in t30.c, and rebuild and reinstall spandsp. The when you
> exchange a fax you should end up with a pair of audio files in your /tmp
> directory - one for the transmit signal and one for the receive signal.
> Send those to me, and I will investigate.
>
> Regards,
> Steve
>
>
> Petr Grussmann wrote:
>
> > I have same problem connected to PBX over E1 and sync and not slip I
> > have latest version spanDSP
> >
> > I receiving 1/3 pages from faxis
> >
> > ?
> > who is a problems-)
> >
> >
> > I
> > Steve Underwood wrote:
> >
> >> Hi Troy,
> >>
> >> People had a lot of problems like this with earlier versions of
> >> spandsp. However, the latest version is pretty solid, and people are
> >> using it in high volume production applications. If you are getting
> >> these bad results with the latest version I would be interested to
> >> see the audio log file, so I can investigate the reason.
> >>
> >> Regards,
> >> Steve
> >>
> >>
> >> Troy Settle wrote:
> >>
> >>> Dunno about not being able to generate a tiff, I got rxfax to do
> >>> that, but
> >>> they're badly malformed.
> >>>
> >>> http://roanoke-voip01.psknet.com/fax/
> >>
>
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