Re: [hylafax-users] DTE to DCE Data Underflow

["Jay R. Ashworth" <jra@baylink.com>]

On Wednesday, August 30, 2000, at 7:03:28 AM, Andreas Grimmel wrote:
> I set up a HylaFAX Server quite successful some time ago, and it seemed
> to work REALLY fine. Then I went in vacation and when I came back, I got
> lots of people queueing in front of my office door, all of them telling
> me the same thing: Some Faxes just can't be delivered, and in the logs
> it says everytime the same thing: "DTE to DCE Data Underflow" etc etc
> etc.

Hmmm...

> This does not happen all of the time, most faxes are delivered very
> well. For me it seems this is a problem with older Fax machines, I tried
> this in our office with one 5-year-old-machine and one 6-months-old-one.

Yeah; some modems and some fax machines will get along poorly.

> With the old one faxing crashes everytime, with the new one never.
> I'm using a SUSE 6.3 Box with a 2.2.14 Kernel running on a
> PentiumIII/550 SCSI Machine with 256 Megs of RAM, an Elsa Microlink 56K
> Pro Modem in Class 2.0 Mode and HylaFAX 4.1beta2.

Cool; a complete list.

> Could that be that the older Fax machines don't understand my Modem's
> talking in Class 2.0 mode ? I don't have too much knowledge about fax
> protocols and phone lines and that stuff, so please excuse me if that is
> a totally dumb question where reactions normally are "damn can't you see
> this has REALLY NOTHING to do with each other???" ;-)

"Damn; can't you see that this has REALLY NOTHING to do with each
other???"

:-)

No; Class 1, 2, and 2.0 define how the fax program talks to the local
modem.  *If* the protocol code is clean in each case (and I would have
blamed 4.0pl2, but 4.1beta is *much* cleaner), then the remote should
be unable to tell how you are talking to your own modem.

It's certainly worth trying switching to Class 1, but I can't
guarantee it'll help.

> I would be very happy if you could help me outta this, because ignoring
> the above problem it's just wonderful seeing the HylaFAX server work (we
> had an NT Machine before, and it crashed twice a week, hehe).

:-)  Can you post a commlog of a failed session or two, and perhaps
one from a success?

> Thanks to the HylaFAX devel team for just a GREAT piece of work.

Yeah; it is spiffy, ain't it?  Me'at off to the dyuke, too.

Cheers,
-- jra
-- 
Jay R. Ashworth                                                jra@baylink.com
Member of the Technical Staff     
The Suncoast Freenet
Tampa Bay, Florida     http://baylink.pitas.com                +1 727 804 5015




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