LOS (Channel Absent)
Wavelength Tracker could not detect the provisioned channel. Possible reasons for this
alarm may be:
• the channel is missing
• the channel is outside the detectable range
• the Wavekeys are not being correctly applied at the source OT or SVAC
If the channel is missing it could be a provisioning error or fibering error.
At the end of each step wait for several seconds to see if the fault clears. If not, go to the
next step:
Note: It may take several seconds for channel power out of range and channel absent
alarms to clear when performing the corrective actions listed below.
Severity Critical
Service affecting? Yes
Applicability A2325A, AHPHG, AHPLG, ALPHG, ALPFGT, AM2017B,
AM2325B, OPS, OSCT, CWR8, CWR8-88, MESH4, OPS, OSCT,
WR
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.
...................................................................................................................................................................................................
1
Perform the procedure “Path Power Trace” (p. 3-8) to identify the probable network
trouble point for the lightpath. Resolve issues/alarms at the trouble point.
Trouble-clearing procedures
LOS
LOS (Channel Absent)
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2-150
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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