If you run a lot of Ethernet cable, it is usually cheaper to build your own. Building Ethernet cables in bulk is easy and inexpensive. All you need is a crimper, jacks, cable, and a pair of scissors or cable cutter/stripper.

There are two standards for Ethernet cables, TIA568A (ISDN) and TIA568B(AT&T). There is no real different between the two and for internal networking, pick one and stick with it. Most commercial cables that I have seen follow 568B. Though there does seem to be a push to move to 568A.

1. Measure out a length of cable to meet your needs
2. Strip off about an inch of the Ethernet cable sheath, be careful not to cut the conductors
3. Untwist the pairs
4. Align the colored wires according to the wiring diagrams below and the standard you are following.
5. Insert the wires into the RJ45 plug to make sure they line up
6. Remove the wires from the plug and trim so that they are all even and the sheath can be fully inserted in the plug
7. Insert the wires into the RJ45 plug again, check the wires are in the correct locations and the sheath is fully inserted
8. Crimp the plug with the crimper tool
9. Verify that the sheath is held in place by the crimp and the wires made contact with the metal contacts
10. Repeat with other side

Pin	T568A Pair	T568B Pair	Wire	T568A Color	T568B Color	Pins on plug face (socket is reversed)
1	3	2	tip	white/green stripe	white/orange stripe
2	3	2	ring	green solid	orange solid
3	2	3	tip	white/orange stripe	white/green stripe
4	1	1	ring	blue solid	blue solid
5	1	1	tip	white/blue stripe	white/blue stripe
6	2	3	ring	orange solid	green solid
7	4	4	tip	white/brown stripe	white/brown stripe
8	4	4	ring	brown solid	brown solid
Wikipedia

References:
Ethernet crossover cable
How to Make a Network Cable
How To Make Your Own Ethernet Cables
How to wire Ethernet Cables
TIA/EIA-568
UTP Cable Termination Standards 568A Vs 568B

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