Allied Telesis AT-8550SP - Manual (Page 28)

Overview
28
Twisted Pair Port LEDs and the LED Mode Select Button
This section applies to the AT-8524M, AT-8524POE, AT-8550GB, and
AT-8550SP switches.
The port LEDs on the front panel display port status information. Each
port has two LEDs. One of the LEDs displays the status of the link
between a port and its end node. The second LED, labeled MODE,
displays a variety of status information, depending on the switch model.
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.
Note
Toggling the Mode Selection button does not affect the normal
operations of the switch.
Table 2 describes the LEDs for the 10/100Base-TX twisted pair ports on
the AT-8524M, AT-8550GB, and AT-8550SP switches.
Table 2 LEDs for the 10/100Base-TX Twisted Pair Ports on the
AT-8524M, AT-8550GB, and AT-8550SP Switches
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
(AT-8524M) OFF Indicates that the port is operating at 10
Mbps.
Green Indicates that the port is operating at 100
Mbps.
Mode - SPD
(AT-8550GB
and
AT-8550SP) OFF Indicates that the port is operating at 10
Mbps.
Green Indicates that the port is operating at 100
Mbps.