|As Stuart pointed out the wake-on-ring is for dial-up users, not DSL.|
When a system is on high-speed (DSL/broadband) there is no specific event that will bring the system up unless you are remotely connecting to it.
Is that what you are trying to do? is the system always on? You can setup remote connection to start a session but the other place to enable is the BIOS if your system has the wake-on-LAN setting. Enable that and decide on the method you are connecting with (remote desktop, PC Anywhere, GOTO My PC) or some other interface.