The recommended installation method is to follow the instructions that comes with the DSL self-installation package (which comes with your DSL modem/router). The instructions will direct you to the following webpage. Note, using this method requires the installation of a small program on your computer.
Suppose you know how to configure a DSL modem/router but need only to register for a new AT&T PPPOE network user account, you can accomplish this by going to the following webpage.
AT&T ships 2Wire devices. Here is a link to the 2Wire Gateway user guide: