26CHAPTER 2: INSTALLING THE SWITCH

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

1000BASE-SX SFP transceiver

Use this transceiver to connect the Switch directly to a multimode fiber-optic cable.

1000BASE-LX SFP transceiver

Use this transceiver to connect 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 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 49.

Use of non-3Com SFPs is not recommended. If the SFP transceiver is invalid it will not be recognized by the Switch.

Use the following sequence of steps to activate the SFP ports:

1The SFP transceiver is keyed and there is only one way in which it can be installed correctly. It is not necessary to power-down your Switch.

2Hold the transceiver so that the connector is toward you and the product label is visible, as shown in Figure 7. Ensure the wire release lever is closed (in the upright position).

3Gently slide the transceiver into the SFP port until it clicks.

CAUTION: SFP transceivers are keyed and can be properly inserted only one way. If the transceiver does not click when you insert it, remove it, turn it over, and reinsert it.

4Remove the plastic protective cover if fitted.

5Use the appropriate cable to connect the transceiver to a suitable device.

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3Com 3 manual Installing the Switch