3Com 3CR17660-91 manual SFP Operation, LEDs on page 54 for a list of suggested solutions, SFP port

26CHAPTER 2: INSTALLING THE SWITCH

	If there is evidence of a problem, see “Solving Problems Indicated by
	LEDs” on page 54 for a list of suggested solutions.
	CAUTION: The Switch has no ON/OFF switch; the only method of
	connecting or disconnecting mains power is by connecting or
	disconnecting the power cord.
SFP Operation	The following section describes how to insert an SFP transceiver into an
	SFP port.
	SFP transceivers are hot-insertable and hot-swappable. You can remove
	them from and insert them into any SFP port without having to power
	down the Switch.

Approved SFP The following list of approved Gigabit Ethernet SFP transceivers is correct Transceivers at the time of publication.

■3CSFP92 SFP (1000BASE-LX)

■3CSFP97 SFP (1000BASE-LH70)

■3CSFP93 SFP (1000BASE-T)

To access the latest list of approved SFP transceivers for the Switch on the 3Com Corporation World Wide Web site, enter this URL into your internet browser:

http://www.3com.com

Inserting an SFP To be recognized as valid, the SFP transceiver must have the following Transceiver characteristics:

■1000BASE-LX SFP transceiver

Use this transceiver to connect Gigabit Ethernet SFP ports on the Switch directly to a single-mode fiber-optic cable or to multimode fiber using a conditioned launch cable.

■1000BASE-LH70 SFP transceiver

Use this transceiver to connect Gigabit Ethernet SFP ports on the Switch directly to a single-mode fiber-optic cable.