44 CHAPTER 2: INSTALLING THE SWITCH
SFP Operation The following sections describes how to select and use an SFP transceiver
in an SFP port.
Approved
1000BASE-X SFP
Transceivers
The following list of approved Gigabit Ethernet SFP transceivers is correct
at the time of publication.
■ 3CSFP91 SFP (1000BASE-SX)
■ 3CSFP92 SFP (1000BASE-LX)
■ 3CSFP93 SFP (1000BASE-T)
■ 3CSFP97 SFP (1000BASE-LH70)
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
SFP transceivers must be matched with the correct cable type as follows:
■ 1000BASE-SX, 1000BASE-LX, 1000BASE-LH70 or 1000BASE-T:
■ 1000BASE-SX SFP transceiver
Use this transceiver to connect Gigabit Ethernet SFP ports on the
Switch directly to a multimode fiber-optic cable.
■ 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 a multimode
fiber using a conditional 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.
■ 1000BASE-T SFP transceiver
This transceiver uses Category 5 copper cabling with RJ-45
connectors and supports segment lengths of up to 100 m (328 ft).
If the SFP transceiver is faulty, it will not operate within the Switch. See
“
Solving Hardware Problems” on page 79.
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