Tap-201: Clear 'Ots Los' And/Or 'Osc Los (Opposite Direction To Optical Channels) - Lucent Technologies LambdaXtreme Alarm Messages And Trouble Clearing Manual

TAPs for PortOA_RP and LINE Alarm
Groups
TAP-201: Clear 'OTS LOS' and/or 'OSC LOS (opposite
direction to optical channels)'
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Overview
Procedure
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365-575-783R1.1
Issue 1, June 2002
This procedure is used to clear the following conditions:
•
OTS LOS
•
OSC LOS (opposite direction to optical channels)
is raised at the InLine port of the RP or RP(50G/100G)
OTS LOS
circuit pack when a loss of the incoming DWDM signal is detected.
OSC LOS (opposite direction to optical channels)
the OutLine port of the OA(Raman), OA(Raman EDFA), OA(DGEF),
OA(VOA), or OA(OADM LineOut) circuit pack when a loss of the
incoming Supervisory signal is detected.
The incoming signal loss is caused by a fiber cut between adjacent
NEs, a disconnected fiber, or failure of the transmitting circuit pack at
the adjacent NE. In the case of a single-fiber cut, the upstream NE
will raise OSC LOS and the downstream NE will raise OTS LOS. For
details see "APR for a Single-Fiber Cut"
connecting two NEs are cut, then both NEs will raise both OTS LOS
and OSC LOS. For details, see
™
LambdaXtreme
LOS and/or OSC LOS. When the incoming signal loss is repaired, the
system will resume normal operation and the OTS LOS and/or OSC
LOS conditions will clear.
Important! This condition is caused by an upstream facility failure or
a failure on the receive side of the NE.
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If the alarm is detected at a Repeater or OADM terminal, look at the
1
source address ID displayed in the alarm report to determine whether
it's an east or a west circuit pack that has raised the alarm. This also
determines whether the alarm affects the east or the west side of the
NE.
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Log into the adjacent NE in the direction identified in
2
Examine the NE Alarm List
Lucent Technologies - Proprietary
See notice on first page
"APR for a Two-Fiber Cut"
Transport initiates APR when an NE detects OTS
.
Trouble Clearing Tasks
is raised at
(3-3). If both of the fibers
(3-8).
Step 1.
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