LEDs
23
6 LEDs
The following table lists the descriptions of the front panel LEDs.
Table 14 Front Panel LEDs
LED
State
Description
Power 1 LED
On
Power 1 is connected and operates properly.
Off
Power 1 is not connected or operates abnormally.
Power 2 LED
On
Power 2 is connected and operates properly.
Off
Power 2 is not connected or operates abnormally.
Running LED
Blinking
The CPU operates properly.
Off
The CPU does not start up.
Ring LED
On
Master station (DT-Ring)/Root (DRP)
Blinking
Slave station (DT-Ring)/B-Root or Normal (DRP)
Off
No ring
Alarm LED
On
An alarm occurs.
Off
No alarm occurs.
100Base-FX Ethernet port LED
On
Effective port connection
Blinking
Ongoing network activities
Off
No effective port connection
Gigabit SFP slot LED
On
Effective port connection
Blinking
Ongoing network activities
Off
No effective port connection
10/100Base-T(X) Ethernet port
speed LED (yellow)
On
100M working state (100Base-TX)
Off
10M working state (10Base-T) or no connection
10/100Base-T(X) Ethernet port
connection status LED (green)
On
Effective port connection
Blinking
Ongoing network activities
