[lug] need cat5 wiring/"Dest host unreachable" help

[Michael J. Hammel]

I'm trying to wire my upstairs game room to my downstairs office with CAT5
cable.  The cable was already run when the house was built.  But the
connections were mucked up.  So I'm trying to fix them.

My office has a gateway connected to a hub with 3 other computers
(including a laptop) hooked directly into the hub.  All that works fine.  I
connected the CAT5 cable in the wall to an CAT5 jack and moved the cable
that was running to the laptop from the hub into the wall.  Upstairs I used
the same wiring combination on the jack (see below) and plugged another
cable from that jack into my laptop.  

I get a link light on the laptops connector (external pcmcia type) and on
the hub.  However, when I ping anyone on the downstairs net from the laptop
upstairs (or reverse the direction) I get "Destination Host Unreachable".
I think the wiring is correct.  But I can't ping anyone on opposite floors.

I doubt the cable is over 100 meters in total length, so that shouldn't be
the problem.  None of the cabled used to plug the laptop into the wall or
the wall into the hub is a crossover cable, so that's the not the problem.  

Is the timeout for the ping expiring and making it look like the remote
hosts can't be reached?  Should any of the transmit/receive wires be
crossed?

I used the T568B standards for the wiring and run in straight through.  The
wire from downstairs runs to a junction box where it is connected straight
through to to the wire that runs to the wall in the game room.  

Anyone got any suggestions?  Some of the twists came out of the wires so I
added them back in (I've heard that helps reduce noise).  But that didn't
help.  The green/green-white pairs seem to provide link lights.  The
orange/orange-white pairs seem to provide data.  Is that correct?  The
blue/blue-white and brown/brown-white pairs are unused as far as I know.
Those latter sets are currently unconnected.

-- 
Michael J. Hammel                               The Graphics Muse 
mjhammel at graphics-muse.org                      http://www.graphics-muse.com
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I have no special talents.  I am only passionately curious. -- Albert Einstein