R502 Multifunctional Broadband Router User Guide     
1.2 LED Indicators on Rear Panel 
LED Indicators  Details 
POWER  Indicates the status of the Power 
SYS  Blinking Indicates the device’s system goes well. 
WAN Blinking
Indicates the WAN port is transmitting or 
receiving data. 
Always
ON 
Indicates corresponding LAN port is 
connected correctly. 
LAN 
(1/2/3/4) 
Blinking
Indicates the corresponding LAN port is 
transmitting or receiving data. 
1.3 Topology: 
 
4