Install guide

16 AT-9900 Series Switch
System LEDs
How the LEDs on AT-9900 Series switches report faults and operational
activities are described in Table 1-1 on page 16.
How the LEDs on power supply units (AT-PWR01) and fan only modules
(AT-FAN01) report faults and operational activities are described in Table 1-2 on
page 17.
Ethernet port and Small Form Factor Pluggable (SFP) port LEDs are described in
the AT-9900 Series Hardware Reference.
Table 1-1: System LEDs on all AT-9900 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 and either 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.
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 and either 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.
Not lit A FOM is installed and the fan is good.
9900qig.fm Page 16 Thursday, September 2, 2004 9:41 AM