This may be caused by the following reasons:
• Damaged or dirty fiber connected to the local receiver
• The received power may not be within the acceptable range on local port input
• The input optical signal is severely degraded by the optical noise
Severity Major
Service affecting? Yes
Applicability 11DPE12E, 11DPM12, 11QPA4, 11STAR1, 43STA1P, 43STX4P
This procedure details the corrective action for an FECUBCSD against the OT port. At
the end of each step wait to see if the fault clears. If it does not, go to the next step.
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1
Clean the input fiber at the receiver, and check if the input power is within the specified
range.
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2
Check if there is any power management or optical channel alarm reported on the link.
Perform the corrective action for clearing these alarms on the link.
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3
Measure the optical signal noise ratio (OSNR) with at the received amplifier with an
optical spectrum analyzer. Check if the OSNR is within the range specified by the EPT.
Perform the actions to improve the system OSNR.
FELANLFI
FELANLFI (Far End Local Fault)
The Far End OT port has detected a LAN Local Fault Indication ordered set at its input.
This condition typically indicates Ethernet link down condition on the client equipment
connected to the far-end port.
Trouble-clearing procedures
FECUBCSD
FECUBCSD (Post-FEC Signal Degrade)
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2-94
1830 PSS-36/PSS–32/PSS-16/PSS-4
8DG60888CAAA Release 3.6.0 and 3.6.1
Issue 1 June 2011
E ND OF STEPS
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