D-Link DP-313 User Manual page 8

Power
Steady green light confirms that the Print Server is powered
on.
Link/Act
In infrastructure mode steady or flashing green light confirms
the Print Server has a good connection to the Access Point.
In ad-hoc mode steady or flashing green light confirms
connection to other PC/Notebook.
The indicator blinks off briefly to indicate that the Print Server is
receiving/transmitting from/to the wireless network.
Wireless Quality (3)
These LED indicator lights show that the Print Server has
wireless quality connections to the network in either ad-hoc or
infrastructure mode.
If only the first Wireless LED indicator lights up, it indicates
poor wireless quality connection.
When the first & second LED indicator lights up simultaneously,
it indicates a moderate wireless quality connection.
If all three LED indicators light up simultaneously, it shows a
high quality wireless connection.
LPT1, LPT2, LPT3
These LED indicators light to show that the Print Server is
transferring print data through the appropriate parallel port.
These three indicators are also used by the print server's
power-on self test (POST) to indicate any hardware failures.
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