TP-Link TL-MR3420 User Manual page 6

Chapter 1
LED Explanation
Name
(System)
( Wi-Fi)
(LAN 1~4)
( Internet)
(USB)
(WPS)
Status
The Router is initializing.
On
The Router is working normally.
Flashing
The Router has a system error.
Off
The wireless function is enabled.
Flashing
The wireless function is disabled.
Off
A device is connected to the corresponding port but no data
On
are being transferred.
Data being transffered via the corresponding port.
Flashing
No device is connected to the corresponding port.
Off
The Internet port is connected and Internet is available.
Blue
The Internet port is not connected.
Off
The Internet port is connected, but Internet is unavailable.
Red
The USB port is connected but no data are being transferred.
On
Data are being transferred via this port.
Flashing
The USB port is not connected to any device.
Off
A device is connected to the router wirelessly successfully
On
using WPS.
A device fails to connect to the router using WPS.
Quick Flashing
A device is connecting to the router using WPS. This process
Slow Flashing
lasts 2 minutes.
Off
Get to Know About You Router
Indication
4