Re: [hylafax-users] Modem Wedged problems

["Mark Bennett" <Mark.Bennett@xxxxxxxxxxxxxxxxx>]

> -----Original Message-----
> From: Glen B [mailto:webmaster@xxxxxxxxxxxx] 
> Sent: Tuesday, 7 June 2005 8:10
> To: Mark Bennett
> Subject: RE: [hylafax-users] Modem Wedged problems
> 
> 
> > -----Original Message-----
> > From: hylafax-users-bounce@xxxxxxxxxxx 
> > [mailto:hylafax-users-bounce@xxxxxxxxxxx]On Behalf Of Mark Bennett
> > Sent: Monday, June 06, 2005 3:36 PM
> > To: hylafax-users@xxxxxxxxxxx
> > Subject: [hylafax-users] Modem Wedged problems
> >
> >
> >
> >
> > I am having fairly frequent "Wedged" problems with my modems.
> >
> > My Hylafax server processes around 1500 faxes / 2500 pages a month.
> >
> > The wedged issue doesn't seem to be modem brand specific, as I have 
> > tried a number of brands including very old 14.4k models.
> >
> > Currently I have 9 x Dynalink 1456VQE external, with the 
> Topic chipset
> >
> > tty config is "standard topic" settings.
> >
> > When wedged, the modem shows carrier present, and seems 
> unable to be 
> > reset.
> >
> > Also, a modem sometimes will just lock up, and not even a wedged 
> > message is sent. It is always the same sender when this occurs.
> > The sender is the biggest multipage sender, and it locks up 
> during the
> > later pages.
> > Typical log error for a lockup is "T.30 T2 timeout, 
> expected page not
> > received"
> >
> 
>  Have you checked the noise levels on your line? Too much 
> noise, or an overly high send level from the remote, can 
> cause any modem
> to freak out radically and freeze up in a knot. I don't know 
> if you can log the noise and signal levels in the fax status, but most
> modems have an AT command that will display them. It could be 
> called just after the initial connect to see if the remote is yelling
> way too loud over the static. I think that would be a nice 
> addition to the modem config parameters for hylafax and the logging
> facility. Many people moan and groan about sporadic T.2 
> timeout and phase B errors, but they don't realize it's 
> probably their phone
> line in combination with a faxmodem that can't deal with high 
> signal levels or excessive noise. Fax modems are no where near the
> class of fax machines in that regards. If they were, they'd 
> be a LOT more expensive.
> 
> Glen

This end, the PABX the modem attaches to is fibre connected to the
nearest exchange, so no noise that I can change.
The major issue is the modem not being available. 
In desparation, I have resorted to stepped incoming lines on the more
critical fax numbers.

I had 200 "wedged" emails this morning, after a long weekend.

I have tried Rockwell chipsets, but no great difference.
There is no support for line quality reporting in the Topic chipset. It
is very basic.

> 
> 

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