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Chapter 1: Overview
34
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
Mode - DC OFF Indicates that the port has not established a
valid link with its end node.
Steady
Green
Indicates that the port is operating in full
duplex mode.
Steady
Amber
Indicates that the port is operating in half
duplex mode.
Flashing
Amber
Indicates that the port is operating in half
duplex mode and that data collisions are
occurring on the port.
Mode - POE OFF Indicates that the device connected to the
port is not a powered device and does not
require PoE.
Green Indicates that the end node is a powered
device and that the port is providing power
to it.
Steady
Amber
Indicates that the port experienced a
problem providing PoE to the end node. For
further information, refer to Chapter 3,
“Troubleshooting” on page 77.
Flashing
Amber
Indicates that the port is connected to a
powered device but that providing power to
it would exceed the maximum PoE power
budget of the switch. For further
information, refer to Chapter 3,
“Troubleshooting” on page 77.
Table 6. LEDs for the 10/100Base-TX Twisted Pair Ports on the
AT-8524POE Switch (Continued)
LED State Description