Allied Telesis Uplink Module - Manual (Page 7)

Installation and Safety Guide 7
613-000689 Rev A
LEDs for the AT-A42/GBIC:
LEDs for the AT-A35/SX and AT-A35/LX:
LED State Function
L/A
Link/Activity Green A 1000 Mbps link is established.
Flashing green 1000 Mbps activity is occuring.
Flashing amber
(and GBIC LED is off) A transmission fault has occured.
Off No link is present.
GBIC Green The switch has recognised the GBIC, the
GBIC is a valid model.
Green (and L/A LED
is flashing green) The port is operating at full-duplex.
Amber
(and L/A LED is off) The switch has not recognised the GBIC,
the GBIC is not a valid model.
Amber
(and L/A LED is off) The port is operating at half-duplex.
Flashing amber (and L/A
LED is flashing green) Collisions are occuring.
Off No GBIC is installed, or a transmission fault
has occurred.
Both LEDs Slow alternate flashing of
L/A and GBIC LED, amber The switch has not recognised the GBIC, or
the GBIC is not a valid model.
LED State Function
Link Green An optical signal is reaching the port.
Off No link is present.
Activity Flashing Amber The port is transmitting or receiving frames.
Off No activity is occuring.