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How to Make a Straight-Through LAN Cable

Creating a Straight-Through (Straight) LAN cable follows specific wiring standards to be used in a computer network. This type of cable is used to connect different types of devices, such as a computer to a switch or router.

Materials Needed

Before making the cable, prepare the following materials:

  1. UTP (Unshielded Twisted Pair) Cable (Cat5e or Cat6)
  2. RJ45 Connectors
  3. Crimping Tool
  4. Cable Stripper or Cutter
  5. LAN Tester (Optional, for testing)

Standard Color Wiring for LAN Cables

A straight-through cable uses the same color sequence on both ends, based on one of these two standards:


1. TIA/EIA-568A Color Sequence:

  1. White-Green
  2. Green
  3. White-Orange
  4. Blue
  5. White-Blue
  6. Orange
  7. White-Brown
  8. Brown

2. TIA/EIA-568B Color Sequence (More Commonly Used):

  1. White-Orange
  2. Orange
  3. White-Green
  4. Blue
  5. White-Blue
  6. Green
  7. White-Brown
  8. Brown

For a straight-through cable, both ends must follow the same wiring sequence (either TIA/EIA-568A to 568A or 568B to 568B).

Steps to Make a Straight-Through Cable

1. Strip the UTP Cable

  • Use a cable stripper to remove about 2 cm of the outer insulation, exposing the eight smaller wires inside.

2. Arrange the Wires According to the Standard

  • Choose either the TIA/EIA-568A or 568B standard and arrange the wires in the correct order.
  • Straighten the wires to keep them neat before inserting them into the RJ45 connector.

3. Trim the Wire Ends

  • Use a cable cutter to ensure that all wires are the same length and even.

4. Insert the Wires into the RJ45 Connector

  • Hold the RJ45 connector with the clip facing downward.
  • Insert the wires all the way in until they reach the end of the connector, making sure the order does not change.


5. Crimp the Cable

  • Use a crimping tool to press the RJ45 connector firmly so that the metal pins inside connect properly with the wires.

6. Repeat for the Other End of the Cable

  • Follow the same steps for the other end, making sure it has the same wiring sequence.

7. Test the Cable with a LAN Tester (Optional)

  • Use a LAN Tester to check if the cable works correctly.
  • If the lights on the tester turn on in the correct order, the cable is properly connected.


Conclusion

A Straight-Through (Straight) LAN cable is used to connect different devices, such as a PC to a switch or router. By following the TIA/EIA-568A or 568B standard and the steps above, you can create a LAN cable that functions correctly.

Tip: If you need to connect two computers directly without a switch, use a crossover cable, which has a different wiring sequence on both ends.

Hope this helps! 🚀💻

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