Allied-telesis AT-8550SP User Manual download pdf (Page 34)

Chapter 1: Overview

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

1 2 ... 29 30 31 32 33 34 35 36 37 38 39 ... 89 90

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