Allied Telesis AT-8600 Series Switch - Manual (Page 18)

Installation & Safety Guide 17
SFP and 10/100/1000Base-T LEDs for the AT-8648T/2SP switch
LED State Description
LINK Off There is no link between the port
and the end-node.
Green A valid link has been established
between the port and the end-
node.
Mode - COL Off No data collisions are occurring on
the port.
Flashing Green Data collisions are occurring on
the port.
Mode - SPD Off The port is operating at 10/100
Mbps.
Green The port is operating at 1000
Mbps.
Mode - FDX Off The port is operating in half-duplex
mode.
Green The port is operating in full-duplex
mode.
Mode - ACT Off There is no activity on the port
Flashing Green There is activity on the port.