Edimax Technology EW-7722PnD - Manual (Page 31)

2-3-5-2 PIN mode WPS configuration
There are two roles in PIN mode WPS configuration: registrar and enrollee.
Registrar is the one who waits for incoming WPS request, and enrollee is the
one who searches for WPS registrar and will attempt to connect it.
The WPS role of two devices should not be same: When one device is
registrar, the other one must be enrollee, and vice versa.
To setup WPS connection by PIN, select ‘PIN / numeric code’, then click right
arrow.
There will be a menu displaying 8-digit WPS PIN code on the configuration
menu, please get this number. Please remember the number will become
invalid after a short period of time (2 minutes or so).
Select ‘Enrollee’ in ‘Config mode’ dropdown list, and input PIN code in ‘Pin
Code’, then click right
arrow.