IW SPM IP Fault Management
Nortel Networks Confidential
Copyright © 2004, Nortel Networks
IW SPM IP Fault Management
Fault management strategy
Alarm reporting system for SPM-based equipment
The alarm reporting system integrates event detection and alarm
notification functions. An alarm becomes active when a reduced
service, reliability, or test condition occurs in the network or network
element. The alarm remains active until a system event or activity
performed by operating company personnel clears the alarm condition.
The alarm system includes audible notification and visual display
through warning lights and the Maintenance and Administration
Position (MAP) terminal.
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Critical alarm
A critical alarm indicates a reduced service condition or complete
loss of service. A critical alarm indicates that the system can no
longer perform its design function. The alarm condition requires
immediate correcting action so that the performance of the system
can return to its design function.
•
Major alarm
A major alarm indicates lost redundancy. The next fault of the same
type can cause a reduction or complete loss of service. There is no
backup if another fault occurs on the active system. this alarm level
can be generated when service decreases below an operating
company defined threshold.
•
Minor alarm
A minor alarm indicates a small loss of redundancy. The next fault
of the same type will not cause degradation of service.
Equipment alarms and alarm severity codes indicate the effect that a
fault or event has on a single piece of equipment. There are three types
of alarm severities:
For IW SPM IP-based equipment, the MAP terminal displays alarm
codes in the banner and the subsystem status summary field (SSSF).
The alarm banner displays alarm codes that indicate the effect of the
