How to create RJ-45 network cables. By Casper3699
casper3699@sisna.com


Things that you need.
- section of Cat 5 cable, length is up to you
- network cable crimper
- pair of pliers or small flat head screwdriver(if you have no crimper)
- some RJ-45 cable connectors


First off you need to strip the main insulation off about an inch from the end. There should be 8 color coded wires(four sets of twisted pairs). The colors are like this, White/orange, Orange, White/Green, Green, White/Blue, Blue, White/Brown, and Brown.

Here is what the wiring standards for each pin is:

Pin#....Signal...........EIA-TIA 568A....AT&T 258A or EIA-TIA 568B
1.........Transmit+.....White-Green....White-Orange
2.........Transmit-......Green...............Orange
3.........Receive+......White-Orange...White-Green
4.........Not used*....Blue...................Blue
5.........Not used*....White-Blue........White-Blue
6.........Receive-.......Orange.............Green
7.........Not used*....White-Brown....White-Brown
8.........Not used*....Brown...............Brown

*Even though they are not used they need to be there

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For standard twisted pair network cable the order goes like this,

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

Side 2
Pin 1 White/Orange
Pin 2 Orange
Pin 3 White/Green
Pin 4 Blue
Pin 5 White/Blue
Pin 6 Green
Pin 7 White/Brown
Pin 8 Brown
Here is how they link together:

1 Tx+ to 1 Rc+
2 Tx- to 2 Rc-
3 Rc+ to 3 Tx+
6 Rc- to 6 Tx-

(Pins 4,5,7,8 are same on both)


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For crossover cable the order is like this

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

Side 2
Pin 1 White/Green
Pin 2 Green
Pin 3 White/Orange
Pin 4 Blue
Pin 5 White/Blue
Pin 6 Orange
Pin 7 White/Brown
Pin 8 Brown
How they link for Crossover cable:

1 Rx+ to 3 Tx+
2 Rc- to 6 Tx-
3 Tx+ to 1 Rc+
6 Tx- to 2 Rc-

(Pins 4,5,7,8 are straight through)


When you get the wires organized the way that you want them then put them into the cable connecters. Before you crimp the connectors together you should double check and make sure that you have the wire config right, if not then reorganize and try again. And make sure the wires are pushed al the way in to the end of the connector. Once you get it right then use the crimper(or pliers if no crimper) and make sure all the connections are locked tight. Now you should probably test it to make sure it works.

Standard network cables are used if you have hus, or switches in your network. They are used to connect your computer to the switch or hub, and to connect one hub to another on the uplink port.
Cross over cables are used if you have no type of switch or hub and need to connect two computers together. It provides a direct connection between two nics. The only thing that you need to remember is to set up your networking using either static IP's or NetBEUI. You can also do this on ones with a hub or switch.

If you have any questions email me at Casper3699@sisna.com or post a reply to this thread.
At the end of this I enclosed a pic to show you where the 1st pin is.