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Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
July 2005
Chapter 1 General Troubleshooting
1.6.7 Sample Trouble Resolutions
Step 4 In the Intervals area, click 15 Min.
1.6.7 Sample Trouble Resolutions
Some sample trouble resolutions using performance monitoring and TCAs for isolating points of
degrade are provided below.
Symptom There is a BBE TCA on a single transponder pair.
Possible Cause The transponder input power is out of range.
Recommended Action Check the input power on the transponder. It should be within the
specified/supported range.
Possible Cause There are dirty trunk connectors on the transponder.
Recommended Action Check the connector on the trunk port.
Possible Cause There is a degraded trunk patch cord between the transponder and the DWDM port.
Recommended Action Check the patch cord on the transponder DWDM port.
Possible Cause There are dirty client connectors on the channel add-drop (ADxC) transmit port or
the demultiplexer has crossed the near-end TCA.
Recommended Action Check the connector on the OCH port of the ADxC.
Possible Cause There are dirty client connectors on the ADxC receive port or the multiplexer has
crossed the far-end TCA point.
Recommended Action If an optical channel bypass exists along the line, check the connectors.
Symptom There is a BBE TCA on all transponders connected to a band add-drop card (ADxB).
Possible Cause The transponder input power is out of range.
Recommended Action Check the input power on the transponder. It should be within the
specified/supported range.
Possible Cause There is a dirty connector on the 4MD port.
Recommended Action Check the connector on the drop port of the ADxB.
Possible Cause There is a dirty connector on the ADxB drop port and it has crossed the near-end
TCA point.
Recommended Action Check the connector on the drop port of the 4MD.
Possible Cause There is a dirty connector on the ADxB add port and it has crossed the far-end TCA.
Recommended Action Check the patch cord on the 4MD or AD1B.
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