LEDs
27
6 LEDs
Table 12 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.
On
The CPU is starting up.
Off
The CPU does not start up.
Ring LED
On
Master (DT-Ring mode)/Root (DRP mode)
Blinking
Slave (DT-Ring mode)/B-Root or Normal (DRP mode)
Off
No ring
Alarm LED
On
An alarm occurs.
Off
No alarm occurs.
100Base-X SFP Port speed LED
（
yellow
）
On
100M working state (100Base-TX)
Off
No connection
100/1000Base-X SFP Port speed
LED
（
yellow
）
On
1000M working state (1000Base-TX)
Off
100M working state (100Base-TX) or no connection
100Base-FX Ethernet port/Gigabit
SFP slot connection status LED
（
green
）
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 or no connection
