LED State Meaning
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.
‡ (1920S PoE+ switches only) Press the Mode button in for PoE mode, leave the Mode button out for
Spd mode.
Mode button
The 1920S PoE+ switches have one Mode LED per port. The Mode LED shows either the port speed or
the PoE status. In PoE mode, it shows whether the port is configured to provide PoE power. The
operation of the Mode LED is controlled by the Mode select button. Press the Mode button in to select the
PoE mode, or leave the button in its out position for Spd (speed) mode.
Reset button
The Reset button is used to restore Factory Default settings, or reset the switch while it is powered on.
• Resetting the Switch — Press and release the button. This action clears any temporary error
conditions that may have occurred and executes the switch self test.
• Restoring Factory Default Configuration — Press and hold down for over 5 seconds, the switch will
then complete its self test and begin operating with its configuration restored to the factory default
settings. Any configuration changes you may have made through the web browser interface are
removed.
Power connector
The 1920S 24G, 1920S 24G PPoE+, 1920S 24G PoE+, 1920S 48G, and 1920S 48G PPoE+ Switches do
not have a power switch, they are powered on when connected to an active AC power source. The
switches automatically adjust to any voltage between 100-127 and 200-240 volts and either 50 or 60 Hz.
There are no voltage range settings required.
The 1920S 8G and 1920S 8G PPoE+ Switches do not have a power switch, they are powered on when
the external AC/DC power adapter is connected to the switch and to a power source. The external AC/DC
power adapter supplies 12 volts DC to the switch and automatically adjusts to any AC voltage between
100-240 volts and either 50 or 60 Hz. No voltage range settings are required.
Mode button 11