What do the WPS LED indicators mean on the TL-WR841N?
A slow flash means a wireless device is connecting to the network via WPS and the process will last up to 2 minutes. A solid on means a wireless device has successfully been added to the network, and the LED will remain on for about 5 minutes before turning off. A quick flash means a wireless device failed to be added to the network by WPS. (Page 4)
From the official TP Link Tl WR841N Wireless N Router manual, page 4
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