D-Link DIR-850L User Manual page 20

Section 3 - Configuration
If the router does not detect a valid Ethernet connection from the
Internet port, this screen will appear. Connect your broadband modem
to the Internet port and then click Next.
If the router detects an Ethernet connection but does not detect the type
of Internet connection you have, this screen will appear. Click Guide me
through the Internet Connection Settings to display a list of connection
types to choose from.
Select your Internet connection type. You can select DHCP Connection
(Dynamic IP Address) if your Internet connection automatically
provides you with an IP Address. This option is commonly used for cable
modem services. Click Next to continue.
D-Link DIR-850L User Manual 15