excessive holdover
....................................................................................................................................................................................................................................
excessive holdover
The system has been in holdover mode for more than 4 hours. This
may cause degraded performance (jitter and slips) on the terminated
payload. Whenever this condition exists, the holdover mode active
condition also exists.
Alarm Data
Value/Meaning
Reported Alarm
Level(s)
Minor (Mn)
AID (type)
Blank
Date
month/day/year that condition was detected
Time
hour:minute:second that condition was detected
Probable Cause
LHI
Effect on Service
NSA
Alarm Entity Type
COM
Description
excessive holdover
Likely Cause
The system was manually switched to holdover mode (with the
opr-syncnsw
command or WaveStar
®
CIT System View
Fault
→
Timing/Sync Protection
Switch
→
Clock Mode Switch
) and the switch has not been reset.
The system is provisioned for sync message signaling, but the upstream
system from which it line-times has not been provisioned for sync message
signaling.
The system automatically switched to holdover mode due to failure of the
timing references and:
•
The reference failures have not cleared.
•
The system is provisioned for nonrevertive synchronization mode
switching.
•
The system is provisioned for line-timed operation and the optical line or
OCN circuit pack has failed, or a message indicating an upstream clock
problem has been received on the sync message bits of the optical line,
or autoreconfiguration is enabled and both line references are failed.
Visible indication
Lighted
MN/ABN
LED on SYSCTL faceplate.
Action
Proceed to
Alarms, conditions, and error messages
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365-372-333 R2.1
Issue 4, June 2005
Lucent Technologies
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