D-Link DSL-5300 User Manual page 19

Section 3 - Getting Started
If the router does not detect a valid Internet connection, a list of
connection types to choose from will be displayed.
Select your Internet connection type (this information can be obtained
from your Internet Service Provider) and click Next to continue.
If the router detected or you selected PPPoE, enter your PPPoE username
and password and click Next to continue.
Note: Make sure to remove your PPPoE software from your computer. The
software is no longer needed and will not work through a router.
D-Link DSL-5300 User Manual 15