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Patch Panel wiring configuration problem.

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Last Modified: 2013-11-09
I'm confused, please help. I look after computers at a site and have little experience with cabling.

To test the connecton I used a simple transmitter which sends a single down each wire, you can see which wire by the lights on the top. The receiver also has the lights so you know which wire is receiving the signals.

I was testing the connection between a patch panel and a wall jack. I connected a Cat5 patch cable to a transmitter and plugged it into the patch panel. Then connected another Cat5 patch cable to a remote receiver and plugged it into the corresponding wall jack at the other end of the building.

The transmitter  was transmitting sequentially 1 through 8. I expected to see the same at the remote end. However the number order being received was 2, 1, 6, 5, 4, 3, 8, 7. My assumption was it had been wired incorrectly and would not work. However I plugged a computer into the wall jack, connected a switch with a server on it to the patch panel and everything worked fine.

Am I missing something???
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thacloneCyber Security Architect
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Commented:
you are not missing anything as long as all the lights light up irrespective of the order in which they appear except that your cable tester says it means something. by the way what cable tester are you using ?
thaclone
What speed you are connected with if you are using 100 mbps then only two pairs are used. Pair 1,2 & 3,6 are used to transmit & recieve the signal. If other pairs open its not going to affect the communication.

Cheers

Yasir
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Commented:
Yes definately a crossover connection
I would just re-terminate the cables.  Cause a lot less problems in the future.  To me it does not sound like a crossover cable but a mis-terminated cable or a problem with your tester.
Thanks, for future reference, a strait though cable is terminated orange/white, orange, green/white, blue, blue/white, green, brown/white, brown on both ends.  A crossover will be the above on one end and green/white, green, orange/white, blue, blue/white, orange, brown/white, brown on the other end.
Thanks and HTH
Jason

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