Allied Telesis AT-8088/xx (MT and SC) - Manual (Page 30)

Overview
30
Twisted Pair Port LEDs and the LED Mode Select Button
The twisted pair port LEDs and the LED Mode Select button for the
AT-8000 Series Switches are describe below.
The port LEDs on the front panel display port status information. Each
port has two LEDs. The Link LED indicates whether there is a valid link
between a port and the end-node connected to it.
Each port also has a Mode LED. This LED displays a variety of status
information, including port speed and duplex mode. You use the Mode
Select button on the front panel to toggle the Mode LEDs to display
different status information. The LEDs next to the Mode Select button
indicate the status being displayed by the port Mode LEDs. For example,
if the Mode 100 LED is green, then the port Mode LEDs are displaying
port speed.
Note
Toggling the Mode Selection button does not affect the normal
operations of the switch.
Table 2 describes the twisted pair port LEDs of the AT-8000 Series
Switches, except for the AT-8088/xx switch, which does not have a LED
Mode Select button.
Table 2. AT-8000 Series Twisted Pair Port LEDs
LED State Description
LINK OFF Indicates that there is no link between the
port and the end-node.
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 - 100 OFF Indicates that the port is operating at 10
Mbps.
Green Indicates that the port is operating at 100
Mbps