D-Link DGS-3420-28SC Quick Installation Manual page 3

Hardware Overview
LED Indicators
LED Indicative Colour
Power Green
Console Green
RPS Green
SD Green / Red
Stack ID
Link/Act Green /
Orange
MGMT Green
Status Description
Solid Green Power on.
Light off Power off.
Blinking Green During the Power-On Self Test (POST).
Light off When the POST is finished.
Solid Green When a user is logged in through the console port.
Solid Green Redundant Power Supply is in use.
Light off RPS is not in use.
Blinking Green RPS is connected.
Solid Green If a Secure Digital (SD) card is plugged in.
Blinking Green The Switch is reading or writing data to and from the SD card.
Light off No SD card is plugged into the SD port.
An SD card failure has been detected.
Solid Red
1 – 12
The box ID is assigned either by the user (static mode) or by the system
(automatic mode). For standalone Switches, this will display number "1".
H The device was assigned as the stacking Master.
h The device was selected to be the Backup Master.
The Safeguard Engine feature enters the exhausted mode.
G
Solid Green
When there is a secure connection to a 1000Mbps Ethernet device at any
of the ports.
Solid Orange
When there is a secure connection to a 10/100Mbps Ethernet device at any
of the ports.
Blinking Green When a 1000Mbps port is active.
Blinking Orange When a 10/100Mbps port is active.
Light off No link or activity.
Solid Green
Console on.
Blinking Green Secure connection established.
Light off Console off.
3