Help for Home LAN Cabling

Help for Home LAN Cabling


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Posted by Paul Matthews on December 19, 1999 at 10:27:02:

I have a small Ethernet (10 Base-T) LAN in my home
office. I have used it for years. I have a Netgear
RT-328 ISDN router and a Bay Networks Model 800 hub,
with a Unix box and several NT boxes. My house has
several floors, and I will be incapacitated by surgery
next week for several weeks. I do not have a patch
panel with segments going upstairs, so I had an
electrician install a straight-through cable segment
from my Living Room/Office to the bedroom upstairs.
It has Radio Shack RJ-45 outlets at each end. The
cable apparently tested okay when he installed it.

When I plug my laptop into the socket upstairs with a
short (about 6') patch cable and a patch cable at the
hub to the other socket, I get a green light on my
3Com PCMCIA adapter that indicates a 10 MbPS
connection. However, TCP/IP fails. Nothing actually
connects to the Internet, so I can't do any work at
my office.

When I made a 50' patch cable and ran it upstairs, it
works fine. Of course there are fewer segments
between the laptop and the hub. I also connected the
50' cable into the upstairs socket and then connected
a short patch cable into the living room socket; the
cable tester indicates the electrician's cable is okay.

Suggestions to make the custom cable work? Do I need
some kind of repeater? I don't understand why this
won't work if the tester indicates correct pinout. I
guess I can live with a cable strung up the stairs for
a few weeks, but it is hazardous, and I would like to
get this fixed properly. Do I need to install a patch
panel and expensive switches?


Thank you for any suggestions. Best regards,

Paul Matthews
Senior Consulting Engineer
(Obviously NOT in LAN Cabling)


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