Inside the Ethernet cable, there are 8 color coded wires. These wires are twisted into 4 pairs of wires; each pair has a common color theme. It is important to wire according to a standard to get proper performance from the Ethernet cable. The plug is an 8-position modular connector that looks like a large phone plug.
1. Strip off about 2 inches of the Ethernet cable sheath.
2. Untwist the pairs - don't untwist them beyond what you have exposed, the more untwisted cable you have the worse the problems you can run into.
3. Align the colored wires according to the wiring diagrams above.
4. Trim all the wires to the same length, about 1/2" to 3/4" left exposed from the sheath.
5. Insert the wires into the RJ45 plug - make sure each wire is fully inserted to the front of the RJ45 plug and in the correct order. The sheath of the Ethernet cable should extend into the plug by about 1/2" and will be held in place by the crimp.
6. Crimp the RJ45 plug with the crimper tool.
7. Verify the wires ended up the right order and that the wires extend to the front of the RJ45 plug and make good contact with the metal contacts in the RJ45 plug
8. Cut the Ethernet cable to length - make sure it is more than long enough for your needs.
9. Repeat the above steps for the second RJ45 plug.
Use an Ethernet cable tester, to verify the proper connectivity of the cable. If your cable doesn’t pass the test, look closely at each end and see if you can find the problem. A wire might be in the wrong place.
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