I am new to Cisco switches and I have purchased a Catalyst 2948G (WS-C2948G used on Ebay and while trying to download documentation on it from Cisco I am finding Catalyst 2948G-GE, 2948G-TX, 2948G-L3. How do I know which one I have? There is no image loaded to it so I don't know if it is a router or just a switch. When I remote to it all I get is rommon. Any help would be appreciated.