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Cat5e wiring problem

Discussion in 'Networking' started by wdnitz, Nov 21, 2011.

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  1. wdnitz

    wdnitz Thread Starter

    Nov 21, 2011
    I just purchased some RJ-45 jacks for Cat5e and discovered that they were marked incorrectly. The error is that the blue pair is inverted according to 568A & 568B standards. (Pin 4 is color coded for white/blue and pin 5 is blue.) Some of these jacks were terminated onto plenum cables with correctly marked RJ-45 jacks on the other end. The effect is that TRD2+ and TRD2- get swapped from one end to the other. I'm guessing this going to cause a problem. Is it?
  2. Rockn


    Jul 29, 2001
    I would say it sill cause an issue eventually. It would be best to pull them all and wire them all up 568B
  3. jiml8

    jiml8 Guest

    Jul 2, 2005
    Some NICs autodetect the way the cable is wired. If your NICs do this, you won't have any trouble. Sounds to me like you bought crossover cables without intending to.
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