We help IT Professionals succeed at work.

Patch Panel wiring configuration problem.

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???
Watch Question

thacloneCyber Security Architect

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 ?
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.


Unlock this solution and get a sample of our free trial.
(No credit card required)

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

Gain unlimited access to on-demand training courses with an Experts Exchange subscription.

Get Access
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Empower Your Career
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE

Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Unlock the solution to this question.
Thanks for using Experts Exchange.

Please provide your email to receive a sample view!

*This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.


Please enter a first name

Please enter a last name

8+ characters (letters, numbers, and a symbol)

By clicking, you agree to the Terms of Use and Privacy Policy.