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Checking LEDs
Once the module is correctly installed and the switch is
powered up, check the LEDs on the module and the front of
the switch to ensure correct operation.
LED
State
Module LEDs
Packet
Yellow
Status
Green
Green flashing
Switch unit LED
Status
Yellow
Yellow flashing
Off
Removing the Module
To remove the module from a switch
1 Disconnect the switch from the power supply and remove
fiber cables from the module.
2 Undo the two captive thumbscrews securing the module into
the switch. Do not remove any other screws from the rear of
the switch.
3 If you are not fitting another module immediately, you must
replace the blanking plate to ensure that dust and debris do
not enter the switch and to aid the circulation of cooling air.
Indicates:
Traffic is being transmit-
ted/received on this port
Link is present; port enabled
Link is present; port disabled
Module operating correctly
Unsupported module installed
No module installed
Problem Solving
If you suspect a problem, carry out these steps before
contacting your supplier:
Ensure that the devices at both ends of the link are
powered up and the connections are secure.
Ensure that the module is correctly installed in the switch.
Ensure that port configuration is correct.
Ensure the Tx and Rx connections are correct.
Clean the terminators (fiber cable ends) by wiping them
gently with a clean tissue or cotton bud moistened with a
little ethanol. Dirty fiber terminators on the fiber optic
segment will impair the quality of the light transmitted
through the cable.
Check that the host switch is operating correctly.
Obtaining Support
For further information on obtaining support, refer to the
Technical Support information in the User Guide that accom-
panies the switch, or visit our World Wide Web site by enter-
ing the following URL into your web browser:
http://www.3Com.com/
Year 2000 Compliance
For information on Year 2000 compliance and 3Com
products, visit the 3Com Year 2000 Web page:
http://www.3com.com/products/yr2000.html