A UTP (Unshielded Twisted Pair) cable consists of four twisted cable pairs. The standard colors for these pairs are:
- white/blue - blue
- white/orange - orange
- white/green - green
- white/brown - brown
There are two different cables you may need, and the wiring has to be done as follows:
- For a Hub to Hub or Computer to Computer connection you need a Crossover Cable: one end T568A and the other end T568B.
- For a Hub to Computer connection, you need a Straight-Through Cable: T568B on each end.
This wiring scheme is the most common, but of course you can make a Straight-Through Ethernet Cable using T568A on each end.
All 1000Base-T 100Base-T and 10Base-T Category "X" are wired this way (or equivalent).
Search Google for further reading on Ethernet cables.
T568B (with clip down)
T568A (with clip down)
