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3com 4210G Manual De Usuario

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Table 1-9 
Port mode LED description 
LED 
Status 
Description 
Steady green 
Indicates port rate. 
Flashing green (1 Hz) (supported by 
PoE switches only) 
Indicates port PoE power supply. 
Mode 
Steady yellow 
Indicates port duplex mode. 
 
Seven-Segment LED 
The seven-segment LED and the system status LED together indicate the operating status of the 
device. For details, refer to 
Table 1-10 
Seven-segment LED description (1) 
Status 
LED 
System status 
LED (PWR) 
Seven-segment LED 
Description 
Flashing green 
The LED displays the specific numbers 
one by one. 
 
POST running. The LED 
displays the POST test ID. 
Flashing red 
The LED flashes the specific numbers.
 
POST failed. The LED flashes 
the POST test ID of the failed 
test. 
Flashing green 
A bar rotates clockwise around the 
LED. 
 
 
Software loading 
Steady red 
The LED flashes F. 
 
 
Fan failure 
Steady red 
The LED flashes t. 
 
 
Over-temperature alarm 
The LED displays C. 
 
The current switch is the 
command switch in the cluster.
The LED displays S. 
 
The current switch is a member 
switch in the cluster. 
Unit 
Steady green 
The LED displays c. 
 
The current switch is a 
candidate switch in the cluster.