apols, i meant you can have 2 sorts. 1 for adsl lines where the router has a adsl modem built in, and one which can be used on ntl cable modems which have a network cable (also called cat5) connector. the linksys wrt54(g)(s) is a very good bit of kit but only comes in the sort which is used with cable modems. Im sure linksys do similar including adsl modem but im not familiar with it. (the main benefit with wrt54g is that its good hardware and can be flashed with 'alternative' firmware to make it into a very powerful router indeed)