Roughly three seconds of searching on google gave me this :
http://subscriber.communications.sie...00images.shtml
It has an Ethernet connection, but no USB, so I'm assuming that you'll be connected to your computer via the Ethernet? If so then at the moment you'll only be able to connect to your computer
or your Xbox, not both at the same time. Unless you go wireless.
That router doesn't appear to be wireless, which mean to become wireless you'll need a wireless router (around £65) a wireless adaptor for your Xbox (around £55) and a wireless adaptor for your PC (around £20)
Quite an expensive outlay, I'm in a similar situation, luckily I have a USB port on mine as well, which means I can have the PC and the 360 plugged in together... pain in the Arse having to move the 360 all the time but at the minute I can't justify spending that amount of cash to my missus..