D-Link DWA-172 User Manual page 16

Section 3 - Configuration
Press the WPS button on the adapter and holding for two seconds until the
utility screen comes up. Then, press the WPS button on the router/access point
to continue.
The adapter will try to establish connectivity to your access point or wireless
router.
When this screen appears, you have successfully established connectivity.
Click Finish to complete your setup.
WPS UI will save the wireless connection profile named "security.htm" on the
desktop
D-Link DWA-172 User Manual 16