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Chapter 1
General Troubleshooting
In the Intervals area, click 15 Min.
Step 4
1.6.7 Sample Trouble Resolutions
Some sample trouble resolutions using performance monitoring and TCAs for isolating points of
degrade are provided below.
Symptom
Symptom
July 2005
There is a BBE TCA on a single transponder pair.
The transponder input power is out of range.
Possible Cause
Check the input power on the transponder. It should be within the
Recommended Action
specified/supported range.
Possible Cause
There are dirty trunk connectors on the transponder.
Check the connector on the trunk port.
Recommended Action
There is a degraded trunk patch cord between the transponder and the DWDM port.
Possible Cause
Recommended Action
Check the patch cord on the transponder DWDM port.
There are dirty client connectors on the channel add-drop (ADxC) transmit port or
Possible Cause
the demultiplexer has crossed the near-end TCA.
Check the connector on the OCH port of the ADxC.
Recommended Action
There are dirty client connectors on the ADxC receive port or the multiplexer has
Possible Cause
crossed the far-end TCA point.
Recommended Action
If an optical channel bypass exists along the line, check the connectors.
There is a BBE TCA on all transponders connected to a band add-drop card (ADxB).
The transponder input power is out of range.
Possible Cause
Check the input power on the transponder. It should be within the
Recommended Action
specified/supported range.
There is a dirty connector on the 4MD port.
Possible Cause
Recommended Action
Check the connector on the drop port of the ADxB.
There is a dirty connector on the ADxB drop port and it has crossed the near-end
Possible Cause
TCA point.
Check the connector on the drop port of the 4MD.
Recommended Action
Possible Cause
There is a dirty connector on the ADxB add port and it has crossed the far-end TCA.
Check the patch cord on the 4MD or AD1B.
Recommended Action
1.6.7 Sample Trouble Resolutions
Cisco ONS 15454 SDH Troubleshooting Guide, R5.0
1-103
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