LOF-O (Incoming SUPVY LOF)
The OSC SFP receive port on one of the amplifier cards has detected a Loss Of Frame.
The LOF-O alarm is raised if the SONET framer detects framing errors in the A1/A2
overhead bytes as per the SONET specification
This may be caused by the following reasons:
• A misconnected, damaged or dirty fiber
• The received power may not be within the acceptable range
• The data rate may be inconsistent
Severity Major
Service affecting? Yes
Applicability AHPHG, AHPLG, ALPHG, ALPFGT, AM2017B, AM2125A,
AM2125B, AM2325B, OSCT
Corrective Action
NOTICE
Service-disruption hazard
A cold reset, reseat, or replacement of a card is service impacting if the card is currently
carrying services. To determine if any services are currently carried over a card, perform
the procedure “Reseating a Card” (p. 3-19).
If
there are services currently carried over the card, it may be best to wait for a
maintenance window before resetting, replacing, or reseating the card.
This procedure details the corrective action for a LOF-O against the OSC port. At the end
of each step wait to see if the fault clears. If it does not, go to the next step.
...................................................................................................................................................................................................
1
Query for the OSC receive power on the port where the LOF-O condition is present.
CLI show interface
<shelf slot port>
WEBUI From the Equipment Tree, select the card, and select the desired
port.
Trouble-clearing procedures
LOF
LOF-O (Incoming SUPVY LOF)
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2-142
1830 PSS-36/PSS–32/PSS-16/PSS-4
8DG60888CAAA Release 3.6.0 and 3.6.1
Issue 1 June 2011
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