Im a little confused, the voyager 105 is, I believe, a usb ASDL modem and apparently not compatible with Vista. The Linksys is a router. and requires either a LAN or wireless card in your laptop to connect to. Most, if not all, new laptops will have at least one and probably both.
You said you were with AOL by way of cable. Do you mean that you connected through an ethernet cable to another device (router) located away from your PC. Or are you saying that your ISP is a cable network (such as cable TV provider?)