Hawking Technology PS12U - Manual (Page 6)

LED Indicators
The print server is equipped with three
LED lights to assist in diagnosing print
server or network errors.
Status ( Orange )
When the print server unit is powered on, the Status LED will flash up
to five times as part of the unit’s Power On Self Test (POST). This
indicates that the print server hardware is properly configured. This
LED, however, may flicker whenever data is being transmitted and
printed.
2 Link LEDs ( Green )
This light will illuminate green if the PS12U detects a problem-free
network connection.