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DB9 Cable: Crossover or Straight?

SirHill Posted messages 4070 Status Contributor -  
rafit jad kuldinger Posted messages 9193 Status Member -
Hello everyone,

How can you tell if a DB9 (or DB25) cable is a crossover cable or a straight-through cable?

Sure, you can plug it in and see "if it works", but is there a simpler and faster way?

Thank you for your responses.

6 answers

  1.
    Yoan Posted messages 11905 Status Moderator 2 356
     
    Hello,
    DB9 right = male / female
    DB9 crossbred = male / male
    --
    The urgent is done, the impossible is in progress,
    For miracles, please allow some time...
    9
  2. insomniak Posted messages 1544 Status Member 196
     
    Hello

    You can determine your cable by looking at the color of the wires on one of the plugs (if they are transparent)

    Here I think you have a good schematic! :
    http://polmeguimafr.free.fr/raccordement.html
    6
    1. rafit jad kuldinger Posted messages 9193 Status Member 1 155
       
      Ne pas confondre le RJ45 avec le DB9 (série) et le câble 25 broches (parallèle).
      0
  3. BRIEDJ Posted messages 23 Status Member 21
     
    Good evening everyone

    I have a straight DB9 cable and a female-male adapter. I cut wires 2 and 3 and crossed them (wire 2 with 3 and 3 with 2), aside from wire 5, should I cut the other wires (1, 4, 6, 7, 8, 9)?

    Thanks in advance and see you soon.

    Brièdj
    4
  4. SirHill Posted messages 4070 Status Contributor 543
     
    Thank you for your response, insomniak.

    Unfortunately, DB9 or DB25 connectors are generally not transparent or detachable, which does not make things easier...
    1
  6. insomniak Posted messages 1544 Status Member 196
     
    Sorry for the blunder.
    0
  7. jephtem2000 Posted messages 22 Status Member 1
     
    No, no need for it as soon as you've done it, as you say so well, it's fine.
    -3