Instructions
Plug one end of your Ethernet cable into the Ethernet port at the rear of the D-Link router. This looks like a phone jack, only larger.
Plug the remaining end of the Ethernet cable into the Ethernet port at the back of the PS3. A green light will appear next to the port when the Ethernet cable has been properly inserted and is secure in the port.
Use the PS3 control pad to scroll through the options in the main menu screen until you come to "System" and press "X."
Scroll to "Settings" and press "X."
Scroll to "Network Settings" and then select the "Network Test" option. The system will run a quick test and inform you that the Internet connection is made.