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CAT 5 RJ-45 jack termination

By judah.levine ·
I found the CAT-5 Cable Creation Guide very useful. How should I terminate a CAT-5 cable inside an RJ-45 jack? The jack is labeled inside as 1-BL,2-OR,3-BK,4-RD,5-GR,6-YL,7-BR,8-WH. And then, how do I terminate the other end of the cable in the RJ-45 connector in order to plug it into my Ethernet hub?

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CAT 5 RJ-45 jack termination

by DoubleDown In reply to CAT 5 RJ-45 jack terminat ...

The color code for RJ-45 is this:

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

To use this cable with a hub (straight-through) use the same configuration on both ends.

To use this cable directly between two NIC's (cross-over) switch the orange and green wires, and switch the white/orange and white/green wires.

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CAT 5 RJ-45 jack termination

by judah.levine In reply to CAT 5 RJ-45 jack terminat ...

The answer helps me with the 2nd part of my question - that is, how to crimp the connector that goes into the hub.
But, how do I wire the *inside* of the RJ-45 jack?
TIA.

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CAT 5 RJ-45 jack termination

by kth11 In reply to CAT 5 RJ-45 jack terminat ...

the wire is actually terminated on the cat 5 cable inside the rj45 when you crimp it. you jsut need to allow the crimping to take effect using a crimping tool and the wireing that was given by the last answer. The termination is unlike with thin-net with the bnc connectors. With that system the cable needed a resistance to absorb the line so the data would not be bouncing all over the place. Hope this cleared up any confusions.

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CAT 5 RJ-45 jack termination

by judah.levine In reply to CAT 5 RJ-45 jack terminat ...

Inside the RJ45 jack there are 8 screw-down posts, each connected to a solid-colored cable. Which of each of the 8 CAT-5 wires (noted by DoubleDown) should be connected to each of the screw-down posts (1-BL,2-OR,3-BK,4-RD,5-GR,6-YL,7-BR,8-WH)?

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CAT 5 RJ-45 jack termination

by Its a secret In reply to CAT 5 RJ-45 jack terminat ...

You really should not do it. You should allways have the same ends on the cabling. eg. do not put a jack on one end and a connector on the other end. Use a jack on both ends and use a patch cable at the hub and a patch cable at the PC. That is why on racks you have punch down blocks. Most jacks are labled a(568a) and b(568b). The industry standard is 568b on both ends. If you want a cross over do 568a on one end and 568b on the other. The colors you listed sound odd. You list 8 solid colors. Cat5 is twisted pair 4 solid and 4 striped.

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CAT 5 RJ-45 jack termination

by Its a secret In reply to CAT 5 RJ-45 jack terminat ...

answer one gave you the cat5 numbers 1..8
use this setup on your jack as well.

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CAT 5 RJ-45 jack termination

by judah.levine In reply to CAT 5 RJ-45 jack terminat ...

Poster rated this answer

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CAT 5 RJ-45 jack termination

by judah.levine In reply to CAT 5 RJ-45 jack terminat ...

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