3com 4800G Installation Instruction

Redundant power 
system LED 

RPS 

Solid green

The AC power input and the DC power 
input are both normal. 

Solid yellow

The DC power input is normal, but an AC 
power failure occurs or no AC power is 
connected. 

OFF

No DC power is connected. 

Module LED 

MOD  Solid green

The module is in position and works 
normally. 

Flashing yellow

The switch does not support the module 
or a module failure occurs. 

OFF

No module is installed. 

7-segment digital 
LED 

Unit 

POST running

The power LED flashes green  The LED displays the POST test ID. 

  

POST failed

The power LED flashes red 

The LED flashes the POST test ID of the 
failed test. 

  

Software loading

The power LED flashes green. A bar rotates clockwise around the LED. 

  

Fan failure

The power LED is solid red. 

The LED displays F. 

  

Over-temperature alarm

The power LED is solid red. 

The LED displays t. 

  

Cluster state

The power LED is solid green. For a command switch, the LED displays C.

For a member switch, the LED displays S.

For a candidate switch, the LED displays c.

The LED displays 1 if there is only one unit. 

PoE mode

The power LED is solid green.  The LED displays the utilization of the 

power supply. 

  

Table 5   Descriptions of the LEDs on the front panel of Switch 4800G PWR 24-Port

 

 

 

 

 

 

0 - 20% 

21 - 40% 

41 - 60% 

61 - 80% 

81 - 100%