Andrew Libby on Fri, 11 Jun 1999 08:22:24 -0400 (EDT)


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Re: [Plug] Modem lost! Puzzledly!


Let's take some time to consider the modem.  Internal or external?
Jumper or software configured?
You mentioned that you're using COM4 in DOS, what device are you 
using in Linux?  /dev/cua3, /dev/ttyS3?

On Thu, Jun 10, 1999 at 08:40:27PM -0700, Pham Long Trung Duy wrote:
> I had my modem on a windows box, running just fine (not a winmodem).  I
> start play around with PPP and IPmasq on my linux box, so I move the
> modem over linux box, buying a another (unfortunately, pnp win-) modem
> for windows.  After a few test rides, I decided it's not the one for me,
> as when windows get heavily loaded the connection broke.  Taking it back
> to the store and getting the refund is not the problem!  However, the
> problem is, when I tried to re-install my old modem onto the windows box
> (remember?  I cannot get IPmasq working yet), the darn thing won't work.
> 
> Thinking that I probably killed it by static, I still, desperately,
> moved it back to the linux box.  And voila!  It worked!  I could telnet
> to a unix account 2000 miles away.  I'd love to blame Windows and
> Microsoft for it, but I couldn't:  Hate to lose the battle, I bring it
> back to Windows machine, but this time boot it into plain DOS mode, and
> use Telix (minicom-like comm sw for DOS).  Telix can open the COM4
> (supposingly my modem), but the CTS signal is dead, hence unsuccessfully
> communicate to the modem.  
> 
> My next step was to go into BIOS, turning off all the pnp feature.  But
> it doesnt help.  My linux box is a old 486 with ISA/VESA motherboard, no
> pnp at all.  The DOS machine is Pentium 200 Tyan with PCI/ISA and pnp
> BIOS.  I think the problem is at hardware level, but cannot understand
> what difference on the PentiumII motherboard that make the modem won't
> work.  Is it that the software driver for the winmodem reconfigure all
> the pnp things, putting my system (my old modem is also pnp) in wierd
> configuration ?  Or Does BIOS do any pnp configuring at boot even before
> DOS gets loaded?  How come it still work on the old 486?  I even tried
> removing all cards from windows box, leaving just the video and the
> modem card, to eliminate resource conflicts, but still no luck.  What
> went wrong?  What else should I try?
> 
> I hate pnp.  Just give me back my the jumpers.  I CAN read the table!
> 
> I'll try anything to get me out of this mystery!
> 
> thanks for you feedback, btw.
> duy
> 
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