12:05 AM Friday, April 25, 2014 (UTC)

How To Make Straight-Through Ethernet Cable

Here you will come to know how to make Straight-Through cable. Straight-Through Cable is a network cable that used to connect a computer to a network device such as hub, switch, routers, host to switch or hub and router to switch or hub. Below is a diagram taken from the “Cisco Networking Academy Program CCNA” of how to properly match the cable wiring when creating a straight through cable? If you hold the cable in a “U” shape the first diagram would show you the proper way to match the wires on the left side of the “U” and the second diagram would show you the proper way to match the wires on the right side of the “U”.  This is the easier kind of cable to wire because the left wire mapping is the same as the right.

Four wires are used in straight-through cable to connect Ethernet devices. It is quite simple to create this type; the following image describes the four wires used in a straight-through Ethernet cable. You can see that only 1, 2, 3, and 6 wires are used. Now you have to just connect 1 to 1, 2 to 2, 3 to 3, and 6 to 6 then you will be up and networking in no time. But remember that this would be an Ethernet-only cable and wouldn’t work with voice, Token Ring, ISDN, and so on.

Filed in: HowTo's, Inter-Networking, Networking, Technology Updates

3 Responses to “How To Make Straight-Through Ethernet Cable”

  1. Susan J. Marquez
    June 19, 2013 at 01:43 #

    The RJ45 data cables we use to connect computers to a Ethernet switch is straight-through cables. As noted above, the RJ45 cable uses only 2-pairs of wires: Orange (pins 1 & 2) and Green (pins 3 & 6). Pins 4, 5 (Blue) and 7, 8 (Brown) are NOT used. Straight-through cable, as its name suggests, connects pin 1 to pin 1, pin 2 to pin 2, pin 3 to pin 3, and pin 6 to pin 6. Cross-over cables are used to connect TX to RX , and TX- to RX-, which connects pin 1 to pin 3, pin 2 to pin 6, pin 3 to pin 1 and pin 6 to pin 2. The unused pins are generally connected straight-through in both straight-through and cross-over cables.

  2. Jonathan Smiths
    June 21, 2013 at 14:54 #

    These cables can be purchased at affordable prices. They way you told about making cable is really appreciable.

  3. June 28, 2013 at 16:07 #

    Strip about an inch of the insulation off the cable. Cut it back nice and square. Some crimping tools such as the one used in this article come with a built-in wire stripper. You put the cable in to a stop on one side of the cutter. It will cut the jacket the right length to make a perfect crimp. It is extremely important that you only cut the plastic insulation/jacket and not the wire. Damaging one of the 8 wires, even if you just nick it or partially cut it, will ruin your cable.

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