Airlink101 AR686W User Manual page 56

Or, you can check "Configure Wireless Station", and enter the PIN generated by the
wireless client computer into Enrollee PIN, and then click Trigger button to start WPS.
2) PBC (Push Button Configuration)
You can choose to press the hardware button on the front panel of the router, or select
Configure Wireless Station, Software button, and click Trigger button to start WPS.
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