TP-Link TL-ER6020 manual  LEDs, Status, Indication,  Interface Description, Port,  Reset button

 LEDs

LED	Status		Indication
PWR	On		The Router is powered on
	Off	The Router is powered off or power supply is abnormal
SYS	Flashing	The Router works properly
	On/Off	The Router works improperly
	On		There is a device linked to the corresponding port
Link/Act
	Off	There is no device linked to the corresponding port
	Flashing		The corresponding port is transmitting or receiving data
	On (Green)		The linked device is running at 1000Mbps
Speed	On (Yellow)		The linked device is running at 100Mbps
	Off		There is no device linked to the corresponding port or the
			linked device is running at 10Mbps
DMZ	On		The port is working in DMZ mode
	Off	The port is working in LAN mode

Interface Description

Interface		Port	Description
WAN	1~2		The WAN port is for connecting the Router to a DSL/Cable
			modem or Ethernet by the RJ45 cable
LAN	1~3		The LAN port is for connecting the Router to the local PCs or
			switches by the RJ45 cable
DMZ	3		The DMZ port is for connecting the Router to the servers
Console		N/A	The Console port is for connecting with the serial port of a
			computer or terminal to monitor and configure the Router

Reset button

Use the button to restore the Router to the factory defaults. With the Router powered on, use a pin to press and hold the Reset button (about 4~5 seconds). After the SYS LED goes out, release the Reset button. If the SYS LED is flashing with a high frequency about two or three seconds, it means the Router is restored successfully.

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