If you have to install a software to make it work basically it uses Dial Up Networking & VPN to make connection so if you just plug a cable modem into a network card and it works, you don't have it.
PPPoE won't work with regular router because you need to log in everytime, so if a router doesn't prompt you, connect will never establish.
Linksys has PPPoe and I think netgear, not sure..