D-Link DIR-819 AC750 Manuel D'installation page 5

Connect another Ethernet cable from the Ethernet port on your computer
3
to one of the LAN ports on the router. You can also connect wirelessly
to the router with your computer. Use the supplied Wi-Fi Configuration
Card for the Wi-Fi network name (SSID) and Wi-Fi password of the router.
Complete steps 4 and 5 before attempting to connect.
RESET POWER POWER PORT
4 Plug the power back into your DSL or cable modem. Please wait about
one minute before continuing.
Modem
1 2 3 4
WPS INTERNET
DIR-819
Ethernet Cable
1 2 3 4
INTERNET
RESET POWER POWER PORT WPS
DIR-819
Computer
Computer
5