[SOLVED] Pin 5 of Cat5E Cable Not Working

[greenmax]

Hi,
I am working on network wiring for my home and am having a peculiar issue with pin 5 for one cable run. Any help on how to troubleshoot would be appreciated. Key details of the whole system are below:

1. Cat5E cables were run by the contractor a few months ago. I have about 15 cable runs that converge from all over the house to a closet
2. I have been placing keystone jacks on the cables in the rooms and connecting them to a patch panel in the closet. The patch panel is a Monoprice 18 port panel
3. So far I have terminated and tested ~10 cables successfully. I am testing them using following tester:

https://www.monoprice.com/product?p...nLtIypGYGIrTrep_GntJ28AN2N-xnJqhoCtJUQAvD_BwE
4. This is the first time I am handling these cables and am getting better with each termination,


In one particular cable, I am not getting a connection on pin 5 (white/blue) cable. I tried cutting the cable by a few inches and terminating it again in the room and the closet but still have the same problem. Then I disconnected the cable from the patch panel and connected it with an RJ45 connector and ran the test again. I still get the failure on the pin 5.

Is there anything I can do to figure out what is wrong or where the cable has a disconnection.

Thanks

 

[bill001g]

This is where a $1000 tester helps

They can scan the wire and tell you if there is break in the cable and approx how far it is from the meter. You could have a staple or nail in the cable someplace.

Normally cutting off a bit and reterminating is all it takes. RJ45 ends are pretty easy to do wrong multiple time but keystones normally you can do just the 1 wire if there is enough slack. Many times you just repunch it down without removing it. The no tools jacks tend to be more problematic.

The only thing it sound like is you have not attempted to replace the jack on the far end unless you terminated both end with rj45 plugs.

This is why when we have cables run in commercial buildings we require a test report on each run. The fancy meters do that too. That way before the contractor leaves we know every cable functions.

 

[greenmax]

Hello @bill001g . I was afraid this would be the reply. Yes, I changed the keystone jack in the room a couple of times as well.

My next question is will I be able to get stable internet connection through this wire for a 10/100MBPS connection. What about a GBPS connection.

 

[bill001g]

10/100 will work fine it uses the pairs on pins 1,2 and 3,6. The only concern I would have is sometime gbit ports get confused with a cable like this. If it does not automatically detect and run at 100mbps try to disconnect all 4 wires that make up the brown and blue pairs.