User's Manual

Chapter 1: Overview
39
is indicated on one of the LEDs next to the MODE LED SELECT button, as
shown in Figure 10.
Figure 10. Front Panel MODE LED SELECT Button and LEDs
The RJ-45 Port MODE LED states are described in Table 7. Each port
MODE is selected by the MODE SELECT button.
Table 7. RJ-45 Port LED MODE States
Switch Model
Port
MODE
LED State Description
AT-9000/28
AT-9000/28SP
AT-9000/52
COL
Solid Green
Data collisions are occurring on the port
Off
No data collisions are occurring on the port
AT-9000/28POE POE
Solid Green PoE is enabled
Off PoE is disabled
Solid
Amber
PD error
Flashing
Amber
Switch’s power budget is at maximum usage
AT-9000/28
AT-9000/28POE
AT-9000/28SP
AT-9000/52
SPD
Solid Green
Link is established at 1000Mbps
Solid
Amber
Link is established at 100Mbps
Off
Link is established at 10Mbps
DUP
Solid Green
Full Duplex mode connection is established
Off
Half Duplex mode connection is established
ACT
Flashing
Green
Port is transmitting and/or receiving data
(default mode)
Off
No activity is established