Our house was pre-wired with cat5e cable to all rooms but we have never tried to use them until we had fios installed this week. Each room has an outlet with 2 rj45 and 2 coax. The Fios router was installed in the closet next to the wire distribution center and when I plug in the cat5e cable (with an rj45 connector ) into the router nothing happens - no light on the router indicating that it recognizes the connection. The ethernet connection in the room has the same result - the pc, laptop and xbox 360 all were all connected and none of them recognized the ethernet connection. I pulled out the outlet plate in the room and the cat5e cable is numbered the same as the cat5e cable on the other end in the wire distribution closet, and I see that they have split the cat5e wiring for ethernet and phone, 2 pairs to one rj45, one pair to the other and left the brown pair out, which sounds right based on what I have read online about splitting cat5 wiring for phone/ethernet into an rj45 connector? But, the online instructions also say that each end of the cable should match, and the connector that goes into the wireless router has all 8 wires attached to the rj45. I would really like to take advantage of the ethernet wiring in the upstairs rooms so that I don't have to buy a wireless card for the pc and the xbox, but am not sure about how to check the rj45 connections. I borrowed a cable tester from my neighbor and it shows a red light which indicates a problem, but I don't know on which end of the cable. Then there is the crossover cable that I read about online, where you switch pins if you are not connecting to a hub. So, is a router a hub???? As you can see, I am not a networking expert but am trying to understand what the problem is before calling in the pros who charge $90 for a service call and $140 an hour. I'm wondering if I have to buy the tools to strip the cable and punch the wires into the new connector if I may be better off calling someone to do it for me, or just buying the wireless cards. Thanks for any help you can give me.