3com Switch 4500G 24-Port Switch 4500G 48-Port Switch 4500G PWR 24-Port Switch 4500G PWR 48-Port User Manual

10/100/1000 
BASE-T 
Ethernet port 
status LED

None

Rate mode

Green

The port works at the rate of 
1000 Mbps; the LED blinks 
quickly when the port is 
sending or receiving data. 

Yellow

The port works at the rate of 
10/100 Mbps; the LED blinks 
quickly when the port is 
sending or receiving data. 

Yellow, 
blinking (3 Hz)

POST fails on the port. 

OFF

The port is not connected. 

Duplex 
mode

Green

The port works in full duplex 
mode; the LED blinks quickly 
when the port is sending or 
receiving data. 

Yellow

The port works in half duplex 
mode; the LED blinks quickly 
when the port is sending or 
receiving data. 

Yellow, 
blinking (3 Hz)

POST fails on the port. 

OFF

The port is not connected. 

PoE mode

Green, ON

The port supplies power 
normally

Green, 
blinking (1 Hz)

The required power of the 
attached devices has exceeded 
the maximum power that the 
port can supply.

The total power that the 
switch supplies has reached 
the maximum power, so the 
port does not supply power 
any more. 

Yellow, ON

The devices attached to the 
port are not powered devices 
(PDs), so the port does not 
supply power.

The PoE power fails, so the 
port cannot supply power. 

10/100/1000 
BASE-T 
Ethernet port 
status LED 
(continued)

None

PoE mode 
(continued)

Yellow, 
blinking (3 Hz)

POST fails on the port

OFF

The port does not supply 
power.

1000 Base 
SFP port 
status LED

None

This LED is 
not 
influenced 
by the mode 
button

Green

The port works at the rate of 
1000 Mbps; the LED blinks 
quickly when the port is 
sending or receiving data. 

Yellow, 
blinking (3 Hz)

POST fails on the port. 

OFF

The port is not connected.

Table 4   Switch 4500G PWR 24-Port and 48-Port Front Panel LEDs