Troubleshooting Transceivers - 3Com CoreBuilder 9000 Installation Manual

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Troubleshooting Transceivers

After you insert the GBIC transceiver into the port, the system software
verifies the transceiver operation. If you should experience problems
refer to the steps and conditions below.
To ensure optimal performance, compatibility, and regulatory
compliance, use only GBIC transceivers that 3Com supports. For a list
of currently supported GBICs, see this 3Com Web site:
http://www.3com.com/gigabit_ethernet/gbics
No LED Error
If the GBIC LED does not light after you insert it into the chassis,
remove the GBIC and re-insert it.
If the transceiver is not working properly, the system displays an
appropriate error message, as described in the following sections.
All these error messages apply to the Switch 4007 only.
"Unqualified GBIC" Error
If the system detects an unqualified GBIC or a problem with the
integrity of the GBIC, it sets the port type to Unqualified GBIC, displays
a short description ( Uqual.GBIC ), and captures the error in the event
log.