3com 7754 用户手册

C

HAPTER

 1: S

WITCH

 7750 C

OMPONENTS

■

4-port 1000BASE-X-GBIC submodule

■

4-port 10/100/1000BASE-T submodule

For more information on these submodules, see “Fabric 32 Submodules”on 
page 12.

The Switch 7750 Fabric modules provide the following fixed ports:

■

■

1000BASE-X-SFP (PoE Fabric 96 only)

■

■

The Fabric module provides a CF port to accommodate a standard CF card, where 
you can save logging information, host version information, alarming and other 
diagnostic information. You can also use the CF port to upgrade software online.

The PoE Fabric 96 provides four 1000 Mbps full-duplex SFP ports. Table 4 describes 
the SFP cables for these ports.

Table 8 describes the LEDs of the SFP ports.

Table 4   Cables for 1000BASE-T-SFP Modules

1000BASE-SX-SFP

850 nm

LC

50/125 µm 
multimode 
optical fiber 
cable

550 m (1804 ft.)

62/125 µm 
multimode 
optical fiber 
cable

275 m (902 ft.)

1000BASE-LX-SFP

1310 nm

9/125 µm single 
mode optical 
fiber cable

10 km (6 mi.)

1000BASE-LH-SFP

30 km (19 mi.)

1000BASE-ZX-LR-SFP

1550 nm

40 km (25 mi.)

1000BASE-ZX-VR-SFP

70 km (43 mi.)

1000BASE-T-FD-SFP

RJ-45

100 m (328 ft.)

Table 5   SFP Port LEDs 

LINK/ACT

Off — The line is not connected. 

 

Green — The line is connected.

 

Green flashing — Data is being transmitted or received.