TP-Link TL-WDR3600 User Manual page 16

WPS/Reset:
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Pressing this button for less than 5 seconds enables the WPS function. If your client devices,
such as wireless adapters, that support Wi-Fi Protected Setup, then you can press this
button to quickly establish a connection between the Router and client devices and
automatically configure wireless security for your wireless network.
Pressing this button for more than 5 seconds enables the Reset function. With the Router
powered on, press and hold the WPS/Reset button (approximately 8 seconds) until the SYS
LED becomes quick-flash from slow-flash. And then release the button and wait the Router
to reboot to its factory default settings.
Wireless antenna: To receive and transmit the wireless data.
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TL-WDR3600 N600 Wireless Dual Band Gigabit Router
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