OMD Input LOS
The OMD port on one of the SFC cards has detected a Loss Of Signal. The LOS alarm is
raised if the power measured at the port input drops below a threshold.
This may be caused by the following reasons:
• A misconnected, damaged or dirty fiber
• The received power may not be within the acceptable range
Severity Critical
Service affecting? Yes
Applicability SFC
n
, SFD
n
Corrective Action
This procedure details the corrective action for a LOS against the OMD port.
At the end of each step wait to see if the fault clears. If not, continue with the next step.
...................................................................................................................................................................................................
1
Query the receive power on the port where the LOS condition is present.
CLI show interface
<shelf slot port>
WEBUI From the Equipment Tree, select the card, and select the desired port.
...................................................................................................................................................................................................
2
Verify that the fiber is the correct type (multi-mode/single mode) and that the other end of
the fiber is connected properly.
...................................................................................................................................................................................................
3
Ensure that the administrative state of the port is Admin Up. If it is Up, then toggle the
administrative state from UP > DOWN > UP.
...................................................................................................................................................................................................
4
Remove the fiber from the receive port where the LOS is raised and measure the optical
power.
If... Then...
the optical power is below the threshold level
provisioned by the 1354 RM-PhM for the type
of port
using the standard optical fiber jumper
cleaning procedure, clean the fiber, and
measure the power again.
Trouble-clearing procedures
LOS
OMD 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
2-161
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