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After R_LOS Is Suppressed, Board Reports IN_PWR_ABN Alarm

Publication Date:  2012-08-12 Views:  49 Downloads:  0
Issue Description

 In an OSN project, the OptiX OSN 3500 and OptiX OSN 1500 form an SNCP ring. Three optical ports on the N1SLQ1 of the OptiX OSN 3500 are not used. Hence, the R_LOS alarm is suppressed for the three optical ports. Then, the IN_PWR_ABN alarm, however, is reported. 

 
 

Alarm Information
 Null 
 
Handling Process

 Suppress the IN_PWR_ABN alarm.  

Root Cause

After a higher level alarm is suppressed, the lower level alarms that are suppressed by this higher level alarm are reported. For example, after the R_LOS alarm is suppressed, the IN_PWR_ABN alarm is reported. 

 

Suggestions

 When you suppress an alarm, note that the lower level alarms that are suppressed by this alarm will be reported.

Figure 1 shows the inter-board suppression relations among common alarms.

Figure 1 Inter-board alarm suppression relations 
   

 Figure 2 shows the suppression relations among key alarms.

Figure 2 Suppression relations among key alarms  

  

END