In large networks, possibly a large number of events occur. In general, network managers only want to be alerted about major network events such as a power failure in a backbone switch or a crash of the corporate mail-server. A non-functioning printer is simply less important and can wait - especially when Alerts are sent to a pager or mobile phone during the weekends. The Monitor one Alerting facility called "The Alerter" allows you to define when and how to alert.
Monitor one distinguishes 6 event types:
All event types except the Extensive Monitoring events can generate an alert!