D-Link DIR-615/T User Manual page 18

Section 3 - Coniguration
If you selected PPPoE, enter your PPPoE username and password.
Click Next to continue.
Note: Make sure to remove any PPPoE software from your
computer. The software is no longer needed and will not work
through a router.
If you selected PPTP, select whether you require a Dynamic IP or
Static IP connection. If you selected Static, enter the IP address,
subnet mask, gateway IP address, and server IP address provided
to you by your ISP. Next, enter your PPTP username and password.
Under DNS Settings, you may need to enter the primary DNS
server address provided to you by your ISP.
Click Next to continue.
D-Link DIR-615 User Manual 14