User's Manual

AT-9000 Gigabit Ethernet Switch Installation Guide
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 AT-9000/28, AT-9000/28SP, AT-9000/52: either collision, speed,
duplex, or activity, depending on the selected mode.
 AT-9000/28POE: either PoE, speed, duplex, or activity, depending
on the selected mode.
LINK LED
The RJ-45 LINK LED states are described in Table 5.
PoE LED
On the AT-9000/12POE switch, the right LED indicates the PoE status as
described in Table 6.
MODE LED
The AT-9000/28, AT-9000/28SP, AT-9000/28POE, and AT-9000/52
switches are equipped with a MODE LED SELECT button.
You can choose the port status parameter (Collision or PoE depending on
the model, Speed, Duplex, or Activity) by pushing the MODE LED
SELECT button located next to the ecoFriendly button on the front panel.
The status of this parameter will be displayed on each RJ-45 port MODE
LED (shown in Figure 9 on page 37). The MODE function that is selected
Table 5. RJ-45 LINK LED States
Switch Model LED State Description
All Solid Green A link is established on the port
Off No link is established on the port
AT-9000/12POE Flashing
Green
Port is transmitting or receiving
data
Table 6. AT-9000/12POE RJ-45 PoE LED States
LED State Description
Solid Green PoE is enabled
Off PoE is disabled
Solid Amber PD error
Flashing Amber Switch’s power budget is at
maximum usage