A “standard” crossover cable looks just like a standard patch cord, but is wired T568A on one end and T568B on the other end. Another way to say this is that the orange and green pairs are swapped. The end-to-end pinout would be as follows:

  End A    End B   Wire Color

     1          3      white/green

     2          6      green (or green/white)

     3          1      white/orange

     4          4      blue (or blue/white)

     5          5      white/blue

     6          2      orange (or orange/white)

     7          7      white/brown

     8          8      brown (or brown/white)

Remember, this is the standard crossover cable. It is typically used for peer-to-peer ethernet connections (i.e. computer-to-computer or hub-to-hub).

If some other crossover cable different than this is needed, it should be defined in at least the level of detail above, so that it can be built correctly.