Allied Telesis AT-8900 SERIES - Manual (Page 11)

Quick Install Guide 11
C613-04048-01 REV B
Alternatively, type a question mark (?) at the end of a partially completed
command to see a list of valid options.
See the AT-8900 Series Software Reference for more information on
configuring the switch.
System LEDs
The following tables define the LED indicator functions on the switch, power
supply units (PSUs), and fan only module (FOM).
AT-8948 LEDs
Table 1: System LEDs found on all AT-8900 Series switches
LED State Function
PSU 1 Green PSU 1 is installed and supplying power to the
switch, and the voltage output is within
specification.
Red PSU 1 is installed in the switch, a fan has failed, or
the PSU has exceeded its recommend temperature
threshold of 75º C (167º F).
A FOM is installed in the switch and a fan has failed.
The bay is empty (no PSU or FOM installed).
Not lit A FOM is installed and the fan is good.
PSU 2 Green PSU 2 is installed and supplying power to the
switch, and the voltage output is within
specification.
Red PSU 2 is installed in the switch, a fan has failed, or
the PSU has exceeded its recommend temperature
threshold of 75º C (167º F).
A FOM is installed in the switch and a fan has failed.
The bay is empty (no PSU or FOM installed).
Not lit A FOM is installed and the fan is good.
Fault Red The switch or management software is
malfunctioning.
1 Flash A switch fan has failed or is operating below the
recommended speed.
6 Flashes The switch’s temperature has exceeded the
recommended threshold.
CF Green The compact flash memory is active. Do not eject
the flash memory module.