Specifications

24 AT-9900 Series Switch
C613-03084-00 REV A
AT-9900 Series port LEDs
Fault Red The switch or management software is
malfunctioning.
1 Flash One or more heatsink fans has failed or is
operating below the recommended speed.
6 Flashes
1
The switch’s temperature has exceeded the
recommended threshold.
Slow flashing at
startup
The SDRAM (DIMM) has not been detected.
Rapid flashing at
startup
The SDRAM (DIMM) is not compatible with the
switch.
CF Green The CompactFlash memory is active. Do not
eject the flash memory module.
1. If the switch exceeds the temperature alarm threshold the fault LED will flash six times, turn off for
a short period, and then repeat the flashing sequence.
Table 1-10: SFP Port LEDs on all AT-9900 Series switches
LED State Function
L/A
(Link activity)
Green A SFP transceiver is installed and a link is open.
Flashing green A SFP transceiver is installed and link activity is
occurring.
Amber A SFP transceiver is installed but a link is not
open.
Flashing amber A SFP transceiver is installed but there is a
transmission fault.
Table 1-11: Ethernet Port LEDs on all AT-9900 Series Switches
LED State Function
L/A
(Link activity)
Green A 1000 Mbps link is open.
Flashing green 1000 Mbps activity is occurring.
Amber A 10/100 Mbps link is open.
Flashing amber 10/100 Mbps activity is occurring..
D/C
(Duplex/collision)
Green The port is operating in full duplex mode.
Amber The port is operating in half duplex mode.
Flashing amber Collisions are occurring.
Table 1-9: System LEDs on all AT-9900 Series switches (Continued)
LED State Function