To add to the above; in the past cross-over cables were used to link like devices, such as a router to a router, a switch to a switch, or PC to PC (directly) where a straight through cable, which is much more common, is used for un-like devices such as a PC to a switch. However, today many switches and routers will automatically detect transmit and receive connections/pins and automatically make the necessary adjustments, allowing you to just use straight through cables.
If interested the pin configurations can be seen in the following diagram:
http://www.incentre.net/in
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by: MarakkarPosted on 2007-12-31 at 19:07:15ID: 20558568
A crossover cable help to connect two computer devices peer-to-peer by switching Tx and Rx pins by making them one talk and the other listen, and the switches each other are no different.
Most of the switches today will have an uplink port equipped with a button when pressed it works as a crossover. Otherwise you can use a crossover cable.