Yea but that's what's stupid about it.
If i put the cable into the back of my router and 360.
1) im not aloud to go on the internet at the same time.
2) It signs me off every second. Absolutely pathetic, And the support for the 360 is dreadful.
If you can't go on the internet, then you're router is the problem.
My router has 4 ethernet out ports and can support as many wireless connections as I need... Are you sure you're not thinking of a modem?
Modem>Router> what ever the fuck you wanna put online.
And I have to disagree with Xbox support being dreadful, my mic started to die, I rang them up, they sent me a new one, simple as.