Allied Telesis AT-8550SP - Manual (Page 32)

Overview
32
Fiber Optic Port LEDs
This section applies to the AT-8516F/SC switch. The fiber optic ports on
an AT-8516F/SC switch have two LEDs, labeled L/A and D/C. The LEDs
are defined in Table 5.
Note
The AT-8516F/SC switch does not have an LED Mode Select button.
Table 5 LEDs for the Fiber Optic Ports on the AT-8516F/SC Switch
LED State Description
L/A OFF Indicates no link has been established
between the port and the end node.
Green Indicates a valid link exists between the port
and the end node.
Flashing
Green Indicates that the port is transmitting and/or
receiving data packets.
D/C Green Indicates that the port is operating in full-
duplex mode.
Amber Indicates that the port is operating in half-
duplex mode.
Flashing
Amber Indicates that data collisions are occurring on
the port.