D-Link AC1750 User Manual page 119

Section 6 - Connecting to a Wireless Network
7. The following window appears while the DIR-869 is being configured.
Wait for the configuration to complete.
8. The following window informs you that WPS on the DIR-869 has been set up
successfully.
Make a note of the security key as you may need to provide this security key
if adding an older wireless device to the network in the future.
9. Click Close to complete WPS setup.
D-Link DIR-869 User Manual 115