Airlink APSUSB1 - Manual (Page 7)

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External Features
This section describes the external features of your 1-Port USB Print Server.
Front View
Front Panel
There are three green LED indicators on the front panel:
LEDs Description
Power Steady light confirms that the Print Server is powered
on.
LAN Steady light confirms that the print server has a good
connection to your network.
When it blinks (briefly dark), the print server is
receiving/ transmitting data from/to the network.
USB Steady blinking (briefly dark) is initiated when the
printer is printing, otherwise, it remains dark.