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3com S8520X-28S 0235A370 User Manual

Product codes
0235A370
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1-11 
Port Mode LED 
The port mode LED on the S5820X series can display the working status of a port for you to obtain more 
device information. You can use the port mode switching button to change the status of the port mode 
LED. 
Table 1-10 
Port mode LED description 
LED 
Status 
Description 
Steady green 
Indicates port rate. 
Mode 
Steady yellow 
Indicates port duplex mode. 
 
10/100/1000Base-T Auto-Sensing Ethernet Port Status LED 
The port mode LED and the 10/100/1000Base-T auto-sensing Ethernet port status LED together 
indicate the port operation status, as shown in 
Table 1-11 
10/100/1000Base-T auto-sensing Ethernet port LEDs description 
Status 
Port mode 
LED 
Ethernet port status 
LED 
Meaning 
Steady green 
The port operates at a rate of 1000 Mbps; the LED is 
fast flashing when data is being sent and/or received on 
the port. 
Steady Yellow 
The port operates at a rate of 10/100 Mbps; the LED is 
fast flashing when data is being sent and/or received on 
the port. 
Flashing yellow (3 Hz) 
Power-on self test (POST) failed on the port. 
Steady green 
(rate mode) 
Off 
No link is present on the port. 
Steady green 
The port operates in full-duplex mode; the LED is fast 
flashing when data is being sent and/or received on the 
port. 
Steady Yellow 
The port operates in half-duplex mode; the LED is fast 
flashing when data is being sent and/or received on the 
port. 
Flashing yellow (3 Hz) 
POST failed on the port. 
Steady yellow 
(duplex mode) 
Off 
No link is present on the port. 
 
SFP+ Interface Status LED 
The port mode LED and the SFP+ status LED together indicate the SFP+ interface operation status, as 
shown in