LOS
Loss of Signal
Loss of Frame (LOF)
A failure to synchronize to an incoming signal.
Loss of Pointer (LOP)
A failure to extract good data from an STS-1 payload.
Loss of Signal (LOS)
The complete absence of an incoming signal.
LPBK
Loopback
LR
Long Reach
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M
Major
Indicates a service-affecting failure, main or unit controller failure, or power supply failure.
MB
Megabytes
Mb/s
Megabits per second
Minor (MN)
Indicates a non-service-affecting failure of equipment or facility.
Miscellaneous Discrete Interface
Allows an operations system to control and monitor equipment collocated within a set of input
and output contact closures.
MJ
Major Alarm
MM
Multimode
MN
Minor Alarm
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365-372-333 R2.1
Issue 4, June 2005
Lucent Technologies
G L O S S A R Y
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