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Date:      Tue, 15 Apr 1997 22:18:21 -0700 (PDT)
From:      Doug White <dwhite@gdi.uoregon.edu>
To:        The Hermit Hacker <scrappy@hub.org>
Cc:        questions@freebsd.org
Subject:   Re: Exhausting modem problems ... 
Message-ID:  <Pine.BSF.3.96.970415221520.13247I-100000@localhost>
In-Reply-To: <Pine.NEB.3.96.970415150420.219R-100000@thelab.hub.org>

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On Tue, 15 Apr 1997, The Hermit Hacker wrote:

> 	Just over a month ago, I upgraded my systems modem from an
> external 28.8 to an internal 33.6.  The modem is called a Magitronic
> and that's about all I know about it.  Standard modem manual comes with
> it...

Good -> cheap.  You couldn't upgrade the external?  Most manufacturers
will upgrade you for cheap or, in the case of Supra, it's just a flash
upgrade.  I've seen more of this change blow up and die under FreeBSD.
Face it people, internal modem flaunt the serial port standard and
*won't*work*.  

> 	The problem is that it randomly hangs.  It doesn't hang up or
> anything, it just sits there and no data goes across the link :(

El-cheapo modem!

> 	I got the reseller to send me a new modem, which I've just installed,
> and get the same 'hang'.
> 
> 	I've tried looking into the modem settings, and there really doesn't
> seem to be anything there that seems, to me, out of the ordinary.  Hardware
> flow control is on, DTE is set at 115200, connection comes up clean, or so
> it seems...
> 
> 	So, I figure I'm down to a general problem with my provider (Netcom.ca,
> whom I wouldn't quite consider close to problem free in the first place...but
> I *never* had a problem with my 28.8 modem...) or with FreeBSD...

El-cheapo modem!

> 	Someone once mentioned that FreeBSD 'triggers' the FIFOs very high
> in comparison to something like Windows, so I may be getting buffer overflows
> that it can't recover from...but I get nothing in /var/log/messages that I
> would expect to back this up...
> 
> 	Can anyone suggest what I might want to look into to determine which
> end of the connection is having the problems?  All I know now is that no
> packets are getting through.

Get rid of your internal and upgrade your external?   :)  I have *never*
trusted internals.  I can't watch their lights and make sure they aren't
doing evil things behind my back.  

As you can tell, I'm touchy about this. :)

Doug White                              | University of Oregon  
Internet:  dwhite@resnet.uoregon.edu    | Residence Networking Assistant
http://gladstone.uoregon.edu/~dwhite    | Computer Science Major




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