the belkin router comes in two ways. a modem/router where there is a modem built in. this is useful if the other users want to access the internet without having to turn on the main computer. you can attatch this to the main phone point if you wish but it needs to be configures at the pc first. personally i have mine hardwired to my main computer and my daughters can access any time they from their room.
the second is just a router, which will connect all the computers