Corrective Action
At the end of each step wait to see if the fault clears. If not, continue with the next step.
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1
Perform the “Path Power Trace” (p. 3-8) to determine if there are any anomalies upstream
of the alarmed card that would cause PWRMARGIN condition to be raised. Look for
excessive losses in fiber jumpers or connectors or signal degrade conditions.
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2
Remove the fiber jumper from the point just before the anomaly and clean the fiber and
the bulkhead connector. Insert the fiber back into the bulkhead connector from which it
was removed.
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3
Repeat Step 1 and Step 2 for the path going upstream until all the excessive losses are
resolved.
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4
Verify that the fiber length and type used in the span immediately upstream of the
alarmed card still match the original specifications according to the network plan. This
may require a validation by performing an Optical Time Domain Reflectometer (OTDR)
test from the customer patch panel into the fiber plant. Any anomalies detected at this
stage require external intervention by personnel responsible for the maintenance of the
fiber plant.
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5
If the path is within all acceptable power ranges, then it is possible that the gain range
provisioned by the EPT for this amplifier is insufficient to accommodate the unexpected
change in loss in the network. Capture the current operating state of the network, using
the EMS XML network export feature and refer the problem to network planning for
analysis.
PWRMAXGAIN
PWRMAXGAIN (Gain Adjustment Exceeded Max Value)
Trouble-clearing procedures
PWRMARGIN
PWRMARGIN (Power Adjust Loss Margin Exceeded)
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1830 PSS-36/PSS–32/PSS-16/PSS-4
8DG60888CAAA Release 3.6.0 and 3.6.1
Issue 1 June 2011
2-267
E ND OF STEPS
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