3com 4800G Installation Instruction

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HAPTER

 1: P

RODUCT

 O

VERVIEW

Figure 9   Rear panel of the Switch 4800G PWR 24-Port

The Switch 4800G PWR 24-Port can adopt AC power input, or DC power input, or 
both to provide backup.

■

AC power input

Rated voltage range: 100 VAC to 240 VAC, 50 Hz or 60 Hz

Rated voltage range: 90 VAC to 264 VAC, 47 Hz to 63 Hz

Only the RPS recommended by 3Com can be used for the Switch 4800G PWR 
24-Port. The -48 VDC power supply in the equipment room cannot be used 
directly. Otherwise, the device may be damaged.

■

DC power input

Rated voltage range: -52 VDC to -55 VDC

The Switch 4800G PWR 24-Port is equipped with six fans for heat dissipation.

For descriptions about LEDs, see Table 5. You can switch the Mode LED display 
mode between speed, duplex, and PoE by pressing the Mode button on the panel.

(7) LED for extended module slot 1 

(8) LED for extended module slot 2 

(9) Mode LED 

(10) Mode button

(1) RPS port 

(2) AC power socket 

(3) Grounding screw 

(4) Extended interface module slot 1 

(5) Extended module slot 2 

(1)

(2)

(3)

(4)

(5)

(1)

(2)

(3)

(4)

(5)

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

Mode LED 

Mode  Speed 

Solid green

Rate of the port 

Duplex  Solid yellow

Duplex mode of the port 

PoE 

Flashing green (1 Hz)

PoE mode of the port 

Power LED 

PWR 

Solid green

The switch is started normally. 

Flashing green (1 Hz)

The system is running a power-on self-test 
(POST). 

Solid red

The system fails the POST or a power 
failure occurs. 

Flashing yellow (1 Hz)

Some ports fail a POST or a port failure 
occurs. 

OFF

The power is disconnected.