Nortel Communication Server 1000 Manual page 178

178 IDA status check and start-up
There are two criteria:
•
An alarm is present for more than the 'persistence time' defined for
that alarm.
•
An alarm occurs more times than the 'reset count threshold' within the
period defined by the 'monitor time' for that alarm.
In either case, the link is stopped, and a minor alarm is raised. When all
alarms are cleared, the link is restarted. Various diagnostic messages
are issued for alarms — please refer to the
(page
To support BTNR 190, four alarms are mandatory:
•
Bit errors of worse than 10-3
•
Alarm Indication Signal
•
Loss of Frame Alignment
•
Loss of Signal
Hardware supported alarm summary
The following is a summary of all alarms supported by hardware:
•
Loss of Frame Alignment
•
Frame Bit Error
•
Alarm Indication Signal
•
Loss of Signal
•
Remote Alarm Indication
•
Bipolar Violation
•
CRC-4
•
Loss of Multiframe Align
•
Slip Error
Setting alarm thresholds
In LD 74, values are set against the parameters shown in
"Alarm thresholds in LD 74" (page
are shown in
179).
Table 101 "Alarm condition thresholds" (page
Nortel Communication Server 1000
DASS2 Fundamentals
NN43001-571 04.01 4 June 2010
Copyright © 2007-2010 Nortel Networks. All Rights Reserved.
"Diagnostic error messages"
179). The alarm condition thresholds
Table 100
179).