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Leds – Allied Telesis AT-2931SX User Manual

Page 19

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AT-29xxSX Series Gigabit Ethernet Adapters Installation Guide

19

LEDs

All adapter models have two LEDs: LINK and ACT. The LINK LED
indicates an active link and the ACT (Activity) LED indicates data transfer
status. After the driver is loaded and the cables are connected properly.
The LINK LED is lit and the ACT LED is on if data traffic is present. See
Table 1.

Table 1. Fiber Optic Port LED Status

LED

State

Description

LINK

On

Valid fiber link.

Off

No fiber link.

ACT

Blinking

Data traffic is present
between the card and the
switch.

Off

Data traffic is not present.