3Com Hub 1000 SX manual Connecting a, GBIC Module, Installing and

Installing and Connecting a GBIC Module 2-7

Installing and	The gigabit interface connector (GBIC) port on the rear panel of the
Connecting a	Hub 1000 SX chassis accepts an optional 3Com GBIC module that
GBIC Module	permits connection to a Gigabit Ethernet device. GBIC modules must
	be ordered separately in either single-packs or six-packs.
	By inserting the appropriate GBIC module in the hub’s rear-panel uplink
	port, you can use various types of cabling to connect the hub to LAN
	devices. For example, you can use the 1000BASE-LX module to reach
	much greater distances than is possible with 1000BASE-SX connections.
	A sample GBIC module appears in Figure 2-4. Table 2-3 lists the types of
	GBIC modules available from 3Com.

Figure 2-4Sample GBIC Module

Table 2-3GBIC Modules

	3Com	Connector		Maximum Cable
Module Type	Part Number	Type	Cable Type	Length (Meters)
1000BASE-CX	3CGBIC4	HSSDC	Shielded balanced twinaxial STP	25
	3CGBIC4-6PK		(coaxial jumper)
1000BASE-LX	3CGBIC2	SC	Long-wavelength fiber-optic
	3CGBIC2-6PK		(1300 nm):
			62.5/125 ∝ MMF
				440
			50/125 ∝ MMF
				550
			SMF
				3000
1000BASE-SX	3CGBIC1	SC	Short-wavelength fiber-optic
	3CGBIC1-6PK		(850 nm):

62.5/125 ∝ MMF	260
50/125 ∝ MMF
	550