D-Link DP-311U - Manual (Page 6)

6
Power / USB
Steady or flashing green light confirms that the Print Server is
powered ON. The LED indicator lights up to show that the Print
Server is transferring print data through the USB port.
Ethernet/WLAN
Steady or flashing green light confirms that the Print Server has a good
connection to the Ethernet or Fast Ethernet network.
The indicator blinks off briefly to indicate that the Print Server is
receiving or transmitting from the network.
These four indicators are also used by the Print Server’s Power-ON Self Test
(POST) to indicate any hardware failures.
Front Panel LED Indicators
Power
USB
WLAN
Ethernet
LED Indicators
The front panel of the Print Server features four LED indicators: