Before we purchase gigabit switches for our network, I want to certify our network wiring to make sure it will support gigabit. Nobody knows for sure if the wires are cat5 or cat5e. The owner of the company says just plug a computer in to a port connected to a GB switch and if it connects at 1GB, then its good. I have had problems with this before and I know that trying to run GB over bad wiring can be worse than just leaving it as 100Mb. However what I am having trouble with is finding documentation to support that. Can anyone help me out by posting some links explaining why you have to test your wiring? Thanks!