How To Make A Ethernet Crossover Cable

Crossover Cable Diagram

There’s two types of color scheme to use. T-568A (color scheme A) and T-568B (color scheme B). The widely used scheme that I have seen is color scheme B. You could use any of the two to create your crossover cable. There’s no difference except the way the color is configured. Just make sure whatever scheme you choose on one end, do the opposite at the other end.

Example: Color Scheme A to Color Scheme B or Color Scheme B to Color Scheme A.

crossover cable diagramcrossover cable diagram

Making A Crossover Cable

So now you have an idea on how to configure the colors. Lets put it to practice.

If you have been following my past tutorial on how to repair a broken ethernet plug. You would have the necessarily tools to complete this task. These tools are included on an inexpensive network kit (crimper, cutter, and ethernet plug).

network kit tools

These Are The Tools You’ll Need!

You could either choose to make a complete cable with a CAT 5e wire or use your existing ethernet cable. The fastest way to create your crossover cable is to use your ethernet cable you have laying around your house. Just cut one end and depending on the color scheme configure the other end opposite of the colors are (color scheme B to A, A to B).

network crimper

Put the cut end of your cable through this groove.

cable stripping

Turn slightly to expose the wire.

exposing cat5e cable

Take out the cable jacket to expose the twisted pairs.

untwisting the cable pairs

Now start Untwisting the cable pairs.

straightening the cable pairs

Now straighten the pairs.

Measure the ethernet plug next to your pairs so you could cut enough length.

Measure the ethernet plug next to your pairs so you could cut enough length.

Cable insertion

Now insert the wire into the plug with the tab facing you.

crimping ethernet plug

then you insert the plug into the slot of the crimper where is 8P.

crossover cable pinout

Once you finish crimping the plug this is how it suppose to look like one end is color scheme A the other is color scheme B.

How To Use A Crossover Cable

Now that you finish making your crossover cable, it’s now time to put it to good use. the reason why you would need a crossover cable is to connect two computers together without going wireless or through an network.

Sure you could network the computer and share files that way, but it does take time or maybe you want to save the file more quickly and have a hard copy.

Most modern computer have a function called auto-midix which enable two computers to connect to each other without worrying what type of cable you have, straight through or crossover. However if you have an older laptop computer there’s a chance you might need a crossover cable. I have a few of these laptops and I constantly use my crossover cable to connect to each other.

And if you’re an aspiring network technician you would have to know how to create and what application you’ll need it for. Packetu have a great article for a more in-depth view in this matter.

Steps To Connect With A Crossover cable

Now here the steps to connect your computers with a crossover cable.

  1. Configure your IP addresses, you would need to make sure that both computers has a IP address that”re in the same subnet. Here a screenshot of how mine is setup.
    ip configure

    This is how it suppose to look like. Go to your network properties to input the numbers.

  2. Make sure your crossover cable is configure correctly.
  3. If you keep getting access denied errors. You would need to setup a new user accounts on both computers with the same name and password with administration rights.
  4. Lastly disable all firewalls including windows by going to your control panel.

Now you’re able to connect between your computers and start transferring files. Don’t you worry! If you’re having issues please don’t hesitate to post a comment and share your problem. I’ll try my best to help you out. And if you know of a better way to connect multiple computers, do share your experience.

Have fun!

Comments 7

    1. Brian Berrios

      Hey Paul, I’m glad you found this tutorial useful. I felt your website packetu.com was essential for the up and coming network technician.

      Do you have any tutorial suggestion you would like to see?

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