Performing Spot Checks 19
not click when you insert it, remove it, turn it over,
and then re-insert it.
3Remove the plastic protective cover, if fitted.
4Connect the fiber cable.
5The transceiver connects to the network using a
duplex LC connector. Attach a male duplex LC con-
nector on the network cable into the duplex LC con-
nector on the transceiver.
6Connect the other end of the cable to a device fitted
with an appropriate Gigabit Ethernet connection.
7Check the Module Active LEDs on the front of the
Switch to ensure that it is operating correctly.

Removing an SFP Transceiver

Removing an SFP transceiver does not require power-
ing off the Switch.
To remove an SFP transceiver:
1Disconnect the cable from the transceiver.
2Move the wire release lever downwards until it is
pointing toward you.
3Pull the wire release lever toward you to release the
catch mechanism.
The SFP transceiver should slide out easily.
Performing Spot Checks
At frequent intervals, you should visually check the
Switch. Regular checks can give you an early warning
of a possible failure; any problems can then be
attended to when there will be least effect on users.
3Com recommends periodically checking the items
listed in Tab le 7.
Tabl e 7 Items to Check
If you experience any problems operating the Switch,
refer to “Troubleshooting” starting on page43.
Item Verify That
Cabling All external cabling connections are secure
and that no cables are pulled taut
Cooling fan Where possible, check that the cooling fan
is operating by listening to the unit. The
fan is fitted near to the front right hand
side of the unit (when viewed from the
front).