Cat5 cable problem

Startech.com Ethernet - rj45 to ethernet...
October 30, 2009 at 13:54:38
Specs: Windows XP
I am running a 50 ft rj45 and it will work on 2 of our laptops but not on any of 3 desktops I have tried.
Our cable tester says it is ok. Any ideas????

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#1
October 30, 2009 at 14:02:46
how did you wire it, xover or straight?

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#2
October 30, 2009 at 14:32:16
Wander may have the idea. It may be that your old cable's were either one or the other.

Try the desktop again but reboot it with the new cable installed. See if it auto corrects. Usually almost all modern nic's support a built in way to correct for cable type. Desktop's don't tend to do it unless you reboot.

Playing to the angels
Les Paul (1915-2009)


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#3
October 30, 2009 at 14:50:15
Cable is straight through.
Rebooting does not make a difference.


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Related Solutions

#4
October 30, 2009 at 15:37:26
What are you connecting with this cable? pc to pc or pc to switch?
Your cable tester just does pinouts correct? No crosstalk/transmission tests?

What pinouts 568A or 568B did you use?


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#5
November 3, 2009 at 05:56:30
attaching to a switch. 568A

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#6
November 3, 2009 at 07:56:01
I would suggest redoing the ends. You shouldn't unravel more then 3/8" of the lines to then insert into the ends.

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#7
November 3, 2009 at 13:59:15
(If possible) Have you tested all computers with the same switch and a shorter pre-made cable....just to rule out any other issues?

> PLEASE HELP OTHERS - Report back what did/didn't work for those referencing this thread.<


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#8
November 5, 2009 at 11:39:53
568B would be the more common standard for UTP

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#9
November 5, 2009 at 12:10:59
First, The ends have been redone several times.
All desktops work with 6 foot cables.
2 laptops work with the long cable.
BUT none of the desktops work with the long cable.

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#10
November 5, 2009 at 13:00:20
The switch it connects to, is it a managed switch?
Heres what I think
1. not a switch that supports mdi/mdix
2. laptops nics support mdi/mdix
3. cable is miswired
4. cable works with devices that can autocorrect the wiring [mdi/mdix]
5. pcs nics can't do mdi/mdix

To know for sure you need a true cable tester not just a pinout tester.


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