This guide explains how to make an Ethernet network cable using an eight-position modular plug and the T568A or T568B wiring standard. Use components rated for the cable category and follow workplace safety requirements.
Tools and Materials
- Twisted-pair Ethernet cable
- Compatible modular plugs
- Cable stripper and crimping tool
- Cable tester
- Boots and labels if required
T568A and T568B
Both standards are valid. A straight-through cable uses the same standard at both ends. T568B is common in many installations, while some structured-cabling requirements specify T568A. Follow the existing site standard.
T568B Pin Order
White-orange, orange, white-green, blue, white-blue, green, white-brown, brown.
T568A Pin Order
White-green, green, white-orange, blue, white-blue, orange, white-brown, brown.
Termination Steps
- Measure the run and leave appropriate service slack.
- Cut the cable cleanly.
- Remove only enough jacket for termination.
- Keep pair twists as close to the plug as practical.
- Arrange conductors in the selected pin order.
- Trim them evenly and insert them fully.
- Confirm the jacket reaches the strain-relief area.
- Crimp with the correct tool.
- Repeat at the other end and test every conductor.
Straight-Through vs Crossover
A crossover cable uses T568A on one end and T568B on the other. Modern devices often support auto-MDI/MDIX, so crossover cables are less commonly required, but the concept remains useful.
Common Problems
- Wrong pin order or reversed plug orientation
- Conductors not fully seated
- Too much untwisted wire
- Damaged conductors
- Plug incompatible with the cable type
- Skipping the cable test
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