D-Link AMPLIFI DAP-1525 User Manual page 21

Section 3 - Configuration
Start WPS on the wireless device you are adding to your
wireless network to complete the setup.
Select PBC to use the Push Button Configuration in order
to connect to your network.
Click Connect to continue.
Press down the Push Button on the wireless device that
you are adding to your network to complete the setup.
D-Link DAP-1525 User Manual 21