LED State Meaning
Power (green) On The switch is receiving power.
Blinking* (1820 8G only) Power is available on the PoE In port (Port 1).
Off The switch is NOT receiving power.
Fault/Locator
(orange)
On On briefly after the switch is powered on or reset, at the beginning of
switch self test. If the LED remains on, it indicates a detected hardware
failure during the self test.
Blinking** A fault has occurred on the switch or one of the switch ports. The Link LED
for the port with the fault will blink simultaneously.
Blinking*** The LED is used to locate a specific switch in an area full of switches. The
LED blinks for 30 minutes when activated through the switch software.
Off The normal state; indicates that there are no fault conditions on the switch.
Link/Act(green) On The port is enabled and receiving a link indication from the connected
device.
Off One of these condition exists:
• no active network cable is connected to the port
• the port is not receiving link beat or sufficient light
• Green Mode has been enabled.
Blinking Indicates that there is network activity on the port.If the Link/Act LED is
blinking simultaneously with the Fault/Locator LED, it indicates a fault on
the port. The blinking behavior (1 second on, 1 second off) is the same as
the Fault/Locator LED.
SpdMode - Spd‡
(green)
On Indicates the port is operating at 1000 Mbps.
Flashing Indicates the port is operating at 100 Mbps.
Off Indicates the port is operating at 10 Mbps.
Mode - PoE‡
(green)
On Indicates the Port LEDs are lit for ports that are providing PoE power to the
connected device.
Blinking** There is an oversubscription condition (not enough PoE power available)
or the port has experienced a fault condition for PoE delivery.
* The blinking behavior is a 6 second on/off cycle; 5 seconds on, 1 second off.
** The blinking behavior is a 2 second on/off cycle; 1 second on, 1 second off.
*** The blinking behavior is a 4 second on/off cycle; 3 seconds on, 1 second off.
‡ (1820 PoE+ switches only) Press the Mode button in for PoE mode, leave the Mode button out for Spd
mode.
Switch overview 9
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