D-Link DWR-112 User Manual page 105

Section 5 - Connecting to a Wireless Network
3. The Wireless Network Connection box will appear. Enter the
WPA-PSK pass phrase and click Connect.
It may take 20-30 seconds to connect to the wireless network. If the
connection fails, please verify that the WPA-PSK settings are correct.
The WPA-PSK pass phrase must be exactly the same as on the
wireless router.
D-Link DWR-112 User Manual 101