D-Link DIR-850L User Manual page 131

Section 5 - Security
5. Enter the same security key or passphrase (Wi-Fi password) that is on
your router and click Connect. You can also connect by pushing the
WPS button on the router.
It may take 20-30 seconds to connect to the wireless network. If the
connection fails, please verify that the security settings are correct. The
key or passphrase must be exactly the same as on the wireless router.
D-Link DIR-850L User Manual 127