D-Link xStack Hardware Installation Manual page 15

xStack® DGS-3420 Series Layer 2+ Managed Stackable Gigabit Switch Hardware Installation Reference Guide
LED
Power
Console
RPS
SD
Stack ID
Link/Act LEDs
PoE
Figure 1- 12. LED indicators for the DGS-3420-52P
Description
This LED will light green after powering the Switch on to indicate the ready state of the
device. The indicator is dark when the Switch is no longer receiving power (i.e. powered
off).
This LED will blink green during the Power-On Self Test (POST). When the POST is
finished, the LED goes dark. The indicator will light steady green when a user is logged in
through the console port.
This LED will light green if the Redundant Powers Supply is in use. If the indicator is off, the
RPS is not in use. When the switch detects that the RPS is connected, the light will be
blinking.
This LED will light green if a Secure Digital (SD) card is plugged in. When the Switch is
reading or writing, the indicator will blink green. No light LED means there is no link. A solid
red LED indicates SD card failure.
For standalone Switches, this will display number "1". For stacked Switches, this indicates
the position in the stacking box ID. The box ID is assigned either by the user (static mode)
or by the system (automatic mode). When "1" to "12" is displayed, this indicates the
stacking position of the switch. An "H" indicates the device was assigned as the stacking
Master. "h" means the device was selected to be the Backup Master. A "G" is displayed
when the Safeguard Engine feature enters the exhausted mode.
The Switch has LED indicators for Link and Activity. The LED will light steady green when
there is a secure connection (or link) to a 1000Mbps Ethernet device at any of the ports, or
steady orange when there is a secure connection (or link) to a 10/100Mbps Ethernet device
at any of the ports. The LED will blink green when a 1000Mbps port is active, or blink
orange when a 10/100Mbps port is active. The LED remains dark when there is no link or
activity.
Only the DGS-3420-28PC and the DGS-3420-52P switches are equipt with a PoE LED.
When this light is on with a solid green light, it means that the corresponding ports are
feeding power to the PoE devices plugged in. When this light is on with a solid orange light,
it means that the port is in an error condition state. When this light is off, it means that the
ports are not supplying power to the devices plugged into the ports.
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