inc. OCN LOF
....................................................................................................................................................................................................................................
inc. OCN LOF
The system has detected a loss-of-frame (LOF) condition in an
incoming OC-N signal. LOF is declared when an out-of-frame (OOF)
condition (four consecutive errored STS-1 framing patterns) persists
for a period of 3 milliseconds.
Alarm Data
Value/Meaning
Reported Alarm
Level(s)
Critical (CR), Minor (MN)
AID (type)
OC-N Line
Date
month/day/year that condition was detected
Time
hour:minute:second that condition was detected
Probable Cause
LOF
Effect on
Service
CR = SA
MN = NSA
Alarm Entity
Type
OC3
OC12
Description
inc. OC3 LOF
inc. OC12 LOF
Likely Cause
Failure of the local OC-N circuit pack, failure of
the OC-N circuit pack at the far-end network
element, or failure of the receiver fiber.
An unprotected line/port carrying service failed:
CR (SA). A protected line/port failed: MN (NSA).
Visible
indication
Lighted
CR/MJ
or
MN/ABN
LED on SYSCTL
faceplate and a flashing
FAULT
LED on the
alarmed circuit pack.
Action
Proceed to
Alarms, conditions, and error messages
....................................................................................................................................................................................................................................
365-372-333 R2.1
Issue 4, June 2005
Lucent Technologies
3 - 5 1
