stright-thru vs crossover

Sa'adSa'ad Member Posts: 150 ■■■□□□□□□□
Does anyone now how to distinguish a stright-thru cable from a crossover cable just by looking at them, are they color coded or labelled, how can you tell the difference?

Thanks!
INE v4 volume 1

Comments

  • Ricka182Ricka182 Member Posts: 3,359
    You can look at each end of a cable, check the colors on each wire, if they match, it's a patch, if not, it could be a cross. You could also use a cable tester.
    i remain, he who remains to be....
  • keatronkeatron Security Tinkerer Member Posts: 1,213 ■■■■■■□□□□
    Sa'ad wrote:
    Does anyone now how to distinguish a stright-thru cable from a crossover cable just by looking at them, are they color coded or labelled, how can you tell the difference?

    Thanks!

    If it's a cable you purchased. It'll have it written on it usually. It will simply read patch if it's just a regular, and it'll read crossover (or something similar) if is a X over.
  • Ten9t6Ten9t6 Member Posts: 691
    Hold up both ends.....hold the connectors side by side. If they are in the same order (color) it is a normal patch cable. If wires 1 and 3......and 2 and 6 are crossed, it is a cross over.

    You can't always go by color. Some Knuckle-head may not know the color scheme, but could get the correct pinouts. A crossover is usually 568A on one side and 568B on the other.

    straight through:

    Pin 1 (TX+) <
    > Pin 1 (RX+)
    Pin 2 (TX-) <
    > Pin 2 (RX-)
    Pin 3 (RX+) <
    > Pin 3 (TX+)
    Pin 6 (RX-) <
    > Pin 6 (TX-)

    Cross over:

    Pin 1 (TX+) <
    > Pin 3 (RX+)
    Pin 2 (TX-) <
    > Pin 6 (RX-)
    Pin 3 (RX+) <
    > Pin 1 (TX+)
    Pin 6 (RX-) <
    > Pin 2 (TX-)


    Other tips......If wired correctly (color):

    568A:

    GreenWhite, Green, OrangeWhite, Blue, BlueWhite, Orange, BrownWhite, Brown

    568B:

    OrangeWhite, Orange, GreenWhite, Blue, BlueWhite, Green, BrownWhite, Brown


    When doing normal wiring, I normally use 568B.

    Hope this helps...
    Kenny

    A+, Network+, Linux+, Security+, MCSE+I, MCSE:Security, MCDBA, CCNP, CCDP, CCSP, CCVP, CCIE Written (R/S, Voice),INFOSEC, JNCIA (M and FWV), JNCIS (M and FWV), ENA, C|EH, ACA, ACS, ACE, CTP, CISSP, SSCP, MCIWD, CIWSA
  • Sa'adSa'ad Member Posts: 150 ■■■□□□□□□□
    Thanks Ten, that is helpful as well.
    INE v4 volume 1
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