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Posted by Michael T on February 25, 2005, 10:07 am
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Environment:
Windows XP Home Edition SP2
Computer: Dell Dimension 8200
ISP: COX cable modem
Modem: LinkSys EtherFast Cable Modem
Network card: CNet PRO200WL PCI Fast Ehernet Adaper
I intermittently see the "cable unplugged" message appear in my Windows XP
taskbar. This just started recently after working fine for over two years.
My question is a simple one (I think).
Is this more likely a problem with the signal from my ISP (COX cable
modem) - or is it more likely it is my cable modem? For that matter, perhaps
the gremlin is my network card.
As always, thank you in advance.
Michael
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Posted by Warren on February 25, 2005, 1:02 pm
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Michael T wrote:
> Environment:
> Windows XP Home Edition SP2
> Computer: Dell Dimension 8200
> ISP: COX cable modem
> Modem: LinkSys EtherFast Cable Modem
> Network card: CNet PRO200WL PCI Fast Ehernet Adaper
>
> I intermittently see the "cable unplugged" message appear in my
> Windows XP taskbar. This just started recently after working fine for
> over two years.
>
> My question is a simple one (I think).
>
> Is this more likely a problem with the signal from my ISP (COX cable
> modem) - or is it more likely it is my cable modem? For that matter,
> perhaps the gremlin is my network card.
The cable modem has a network interface. It's not a swappable card like
the one in the computer. It could be that interface. It could be your
NIC. It could be the cable.
The most likely point of failure is the cable, specifically the
connectors on each end.
The second most likely point of failure is the NIC in the computer.
Issues could include power management causing the NIC to shut down, a
bad transceiver, or a failure to automatically negotiate a connection
(10 or 100, and full or half-duplex). Check your power management
settings to prevent the NIC from shutting down, and try specifying the
connection speed and mode.
Last on the list would be the cable modem's network interface.
Coincidently one of the issues there could be a failure to automatically
negotiate a speed and mode, and specifying one at the NIC could resolve
the problem.
I believe the transceiver on the Linksys modem should support
100/Full-Duplex, but since the DOCSIS standard is only 10/Half- Duplex
it shouldn't matter what speed and mode is selected, as long as there is
agreement between the interfaces. You can't change what the network
interface in the cable modem wants to connect at, so it's just a matter
of matching it. And if you have to do that manually instead of
automatically, it's no big deal. Try 100/Full first, then 10/Full, then
10/Half.
--
Warren H.
==========
Disclaimer: My views reflect those of myself, and not my
employer, my friends, nor (as she often tells me) my wife.
Any resemblance to the views of anybody living or dead is
coincidental. No animals were hurt in the writing of this
response -- unless you count my dog who desperately wants
to go outside now.
Find the best books about gardening in the Pacific NW:
http://www.holzemville.com/mall/nwgarden/index.html
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Posted by Dave on February 25, 2005, 2:20 pm
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I would think it indicates a problem from your NIC to the cable modem. Have
you tried replacing the cable from the NIC to the cable modem?
> Environment:
> Windows XP Home Edition SP2
> Computer: Dell Dimension 8200
> ISP: COX cable modem
> Modem: LinkSys EtherFast Cable Modem
> Network card: CNet PRO200WL PCI Fast Ehernet Adaper
>
> I intermittently see the "cable unplugged" message appear in my Windows XP
> taskbar. This just started recently after working fine for over two years.
>
> My question is a simple one (I think).
>
> Is this more likely a problem with the signal from my ISP (COX cable
> modem) - or is it more likely it is my cable modem? For that matter,
> perhaps the gremlin is my network card.
>
> As always, thank you in advance.
>
> Michael
>
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Posted by Andrew Rossmann on February 25, 2005, 4:18 pm
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says...
> Environment:
> Windows XP Home Edition SP2
> Computer: Dell Dimension 8200
> ISP: COX cable modem
> Modem: LinkSys EtherFast Cable Modem
> Network card: CNet PRO200WL PCI Fast Ehernet Adaper
>
> I intermittently see the "cable unplugged" message appear in my Windows XP
> taskbar. This just started recently after working fine for over two years.
>
> My question is a simple one (I think).
>
> Is this more likely a problem with the signal from my ISP (COX cable
> modem) - or is it more likely it is my cable modem? For that matter, perhaps
> the gremlin is my network card.
As others posted, first check the cable and connections between your
modem and computer (to be honest, you should have a broadband router for
protection.)
It could be the card. There is a computer at work where the built-in
network controller was flakey, no matter which cable and connection we
tried. We ended up putting in a separate network card.
--
If there is a no_junk in my address, please REMOVE it before replying!
All junk mail senders will be prosecuted to the fullest extent of the
law!!
http://home.att.net/~andyross
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Posted by Michael T on February 25, 2005, 3:27 pm
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> says...
> As others posted, first check the cable and connections between your
> modem and computer (to be honest, you should have a broadband router for
> protection.)
>
Thanks everyone. Acting on your tips I discovered the following.
Weeks ago I had taken my long CAT 5 Ethernet cable and coiled it before
applying a twist tie. Well the coiled cable (between NIC and cable modem)
dangled in the air behind my PC. This apparently caused stress on the
connection at the jack (at either end) causing a poor connection.
Michael
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