This read-only INTEGER indicates whether the Server Manager board will notify pagers, telephones, or Server Manager Facilities when this monitored item crosses its threshold, and is undefined if the data type is string, data, or queue. An administrator cares because this governs whether out-of-band paging notification happens for that specific metric. For example, an admin enables this OID on a critical voltage item to ensure on-call staff get paged if it goes out of range overnight.