Allied Telesis AT-8550SP - Manual (Page 33)

AT-8500 Series Fast Ethernet Switch Installation Guide
33
GBIC and SFP Expansion Slot LEDs
The GBIC and SFP slots on the AT-8550GB and AT-8550SP switches,
respectively, have two LEDs. The LEDs display the operating status of the
fiber optic port. Use the Mode Select button on the switch to toggle the
status information displayed by the MODE LED. The LEDs are defined in
Table 6.
Table 6 LEDs for the Optional GBIC and SFP Ports on an AT-8550GB and
AT-8550SP Switches
LED State Description
LINK OFF Indicates that there is no link between the
port and the end node.
Solid
Green Indicates a valid link has been established
between the port and the end node.
Mode - COL OFF Indicates that no data collisions are
occurring on the port.
Flashing
Green Indicates that data collisions are occurring
on the port.
Mode - SPD Solid
Green Indicates that the port is operating at 1000
Mbps.
Mode - FDX OFF Indicates that the port is operating in
half-duplex mode.
Solid
Green Indicates that the port is operating in
full-duplex mode.
Mode - ACT OFF Indicates that there is no activity on the
port.
Flashing
Green Indicates that the port is transmitting and/
or receiving data packets.