To enter in the router or to use internet connection, an user must to use a IP address on the browser address bar that will let you to access to management console of the routers. An user must use 192.168.1.1 (not 192.168.l.1) IP for Netopia, 2Wire and Billion routers. This is private IP address which cannot accessible from outside of home. If anyone uses public IP only then they any one can get access from outside.
Log in to the router using default IP is a matter of a minute, within in one or two minutes you can easily enter to the management console from login screen. Make sure that your PC is connected with routers properly and routers LED lights are showing correct indication. If everything is okay then put the IP on the browser 192.168.1.1 (not 192.168.l.1) and putting default settings you enter in the console and update your firmware first. Now you can visit world through internet connection.