D-Link DIR-601 - Connect to a Wireless Network Using Windows 7

78D-Link DIR-601 User Manual
Section 4 - Security
From the Setup > Wireless Settings screen, click Add Wireless Device
with WPS.
Add Wireless Device with WPS Wizard
PIN: Select this option to use PIN method. In order to use this method you
must know the wireless client’s 8 digit PIN and click Connect.
PBC: Select this option to use PBC (Push Button) method to add a wireless
client. Click Connect.
Select Auto to add a wireless client using WPS (Wi-Fi Protected Setup). Once
you select Auto and click Connect, you will have a 120 second time limit
to apply the settings to your wireless client(s) and successfully establish a
connection.
If you select Manual, a settings summary screen will appear. Write down
the security key and enter this on your wireless clients.