Well, its there because sometimes networks are not JUST wireless, you can get networks with a bit of both, which is why the cable socket is also available for you to plug a switch/hub into it for your wired network. Firmware Updates and other maintenance for the router are also usually carried out by using a computer connected via cable because the wireless network may not function while you are setting it up, so a wired connection would be used.
Hi, Just a thought.. the cable is poss to connect the wireless router to your modem.. (which in turn connects to the ADSL line, I guess).. You should have a wireless card in your PC (or even PCS if you're running a home network) and the router will talk to the card in your PC and pass on all the data via the modem onto the Internet.. At least, I think that's how it is supposed to work.. Hope this helps. BirinciMurat
you must configure the modem's firmware before you can use the router - this enables the router to make the connection with your ISP automatically, each time it's booted. The modem will submit your username/password combination for you, but you must connect it to your PC and download the information to it first. The lead that's supplied with the router plugs into your PC's USB port, and there will be an IP address which you enter into your browser's address bar. This will display an HTML page with fields into which you enter the required details.
You'll only have to do this once, and then you may disconnect the cable link between router and computer.