3Com 9400 manual When you cable Gbic transceivers, note that the SC

Cabling Gigabit Ethernet Ports 25

When you cable GBIC transceivers, note that the SC	Figure 9 Connecting Using a Conditioned Launch Cable
Receive (RX) port is on the left and the SC Transmit
(TX) port is on the right. See Figure 9.

4 Insert the SC connectors on the conditioned launch cable into the transceiver as shown in Figure 9, ensuring that you:

■ Insert the SC connector on the multimode Receive	0BASE TX					STATUS
(RX) side of the conditioned launch cable into the	US	PACKET	CONSOLE		green	= enabled, link OK
			POWER		flashing green = disabled, link OK
			FAULT		off	= link fail
RX port on the transceiver.			1000BASE (GBIC)
						PCKT
■ Insert the SC connector on the single-mode						STAT
	14		15	16	17	18
Transmit (TX) side of the conditioned launch cable			1000BASE (GBIC)
into the TX port on the transceiver.						PCKT
	20		21	22	23	24
						STAT

You can think of the conditioned launch cable as an
extension to the multimode network cable.			RX			TX
5 Attach the other end of the conditioned launch cable						SC connector
to the multimode network cable, ensuring that you:	To network
■ Connect the multimode RX side of the conditioned	cable		A			B
launch cable to the RX side of the network cable.
■ Connect the multimode TX side of the conditioned		A				Offset
launch cable to the TX side of the network cable.
If necessary, use fiber-optic couplers to connect the		A		A	= Multimode fiber
male SC connectors on the multimode end of the					= Single-mode fiber
				B
conditioned launch cable to the multimode network
cable.		7 Repeat steps 1 through 6 for additional 1000BASE
6 Attach the other end of the network fiber-optic cable		GBIC ports.
to the network device that you want to connect.