Alcatel-Lucent 1830 PSS-4 - Page 417

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4
Clean the fiber.
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5
Replace the fiber.
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6
Replace the pluggable module.
LOS-O
LOS-O (Incoming SUPVY LOS)
The OSC SFP receive port on one of the amplifier cards has detected a Loss Of Signal.
The LOS-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
On a fiber span, the OSC mode should match on both ends. If the rates do not match,
LOS-O is raised on one end, and Data Link Down (see “NET” (p. 2-202) is raised on the
other
end.
Severity Minor
Service affecting? No
Applicability A2325A, AHPHG, AHPLG, ALPHG, ALPFGT, AM2017B,
AM2125A, AM2125B, AM2325B, OSCT
Trouble-clearing procedures
LOSOCM
LOSOCM (WTOCM Input LOS)
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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
2-167
E ND OF STEPS
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