3Com 4800G Getting Started Guide - Page 14

14 CHAPTER 1: PRODUCT OVERVIEW (7) LED for extended module slot 1 (9) Mode LED (8) LED for extended module slot 2 (10) Mode button Rear Panel Figure 9 Rear panel of the Switch 4800G PWR 24-Port (1) (2) (3) (4) (5) (1) RPS port (3) Grounding screw (5) Extended module slot 2 (2) AC power socket (4) Extended interface module slot 1 Power Supply System 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 Cooling System The Switch 4800G PWR 24-Port is equipped with six fans for heat dissipation. LEDs 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. Table 5 Descriptions of the LEDs on the front panel of Switch 4800G PWR 24-Port LED Mode LED Power LED Mark Status Mode Speed Solid green Duplex Solid yellow PoE Flashing green (1 Hz) PWR Solid green Flashing green (1 Hz) Solid red Flashing yellow (1 Hz) OFF Description Rate of the port Duplex mode of the port PoE mode of the port The switch is started normally. The system is running a power-on self-test (POST). The system fails the POST or a power failure occurs. Some ports fail a POST or a port failure occurs. The power is disconnected.