I have a computer set up with DSL modem and all the hookups in my room upstairs. But I want to hook up another computer – it is old (Millenium Edition) but just use it for internet only. There is no way to hook it up to wireless so I would have to have it on wired. SO — can I plug the ethernet cable into the phone jack and the other end to the computer and have internet with no router or modem?