3Com 9400 manual Connecting the LX Transceiver to MMF

24CHAPTER 3: CABLING COREBUILDER 9400 PORTS

Figure 8 Cabling the GBIC Transceiver

Connecting the LX Transceiver to MMF

0BASE TX
US	PACKET	CONSOLE
		FAULT
		POWER

1000BASE (GBIC)

141516

		1000BASE (GBIC)
20	21		22

STATUS

green	= enabled, link OK
flashing green	= disabled, link OK
off	= link fail

PCKT

STAT

1718

	PCKT
	STAT
23	24

The LX transceiver supports a connection to multimode fiber using a conditioned launch cable. The conditioned launch cable consists of an offset mechanism on the transmit side of the cable that aligns the single-mode laser launch away from the center of the multimode fiber core, creating a transmission signal similar to typical multimode light-emitting-diode (LED) launches. This offset allows the transmission of LX signals over multimode fiber cable.

You need a conditioned launch cable to complete the following procedure. To ensure optimal compatibility, performance, and regulatory compliance, use only

GBIC

transceiver

Fiber optic

network cableDuplex SC connector

6Attach the other end of the network fiber-optic cable to the network device that you want to connect.

7Repeat steps 1 through 6 for additional GBIC ports.

conditioned launch cables that 3Com supports. For a list of currently supported launch cables, visit this 3Com Web site:

http://www.3Com.com/gigabit_ethernet/gbics

To cable a GBIC port to multimode fiber using an LX transceiver:

1Read and follow the “Fiber Safety Precautions” on page 19 and the Caution at the beginning of “Cabling Gigabit Ethernet Ports” earlier in this chapter.

2Insert a GBIC LX transceiver into a GBIC port until it clicks into place, as shown in Figure 6.

3If you haven’t already done so, remove the SC connector cover from the transceiver, as shown in Figure 7.