The ones triggered by sensors. Example:
PRTG Network Monitor (Monitoring Setver)
Sensor PING 5 (Ping)
Status Up ((Downtime: 5 m 54 s))
Date/Time 11/18/2011 10:51:00 AM (Eastern Standard Time)
Last Result 0 msec (Ping Time)
Last Message OK
Probe Local probe
Group 1st group (visible to all user accounts)
Device Server1
Last Scan 11/18/2011 10:51:00 AM [0 s ago]
Last Up 11/18/2011 10:51:00 AM [0 s ago]
Last Down 11/18/2011 10:50:05 AM [54 s ago]
Uptime/Downtime Up: 99.9840% [83 d 22 h]
Down: 0.0160% [19 m 22 s]
Cumulated since: 8/25/2011 4:02:03 PM
Settings Interval: 60 sec
Location
Sensor History 11/18/2011 10:50:00 AM Notification Info, State Trigger activated (Trigger ID: 8589934592)
11/18/2011 10:46:01 AM Notification Info, State Trigger activated (Trigger ID: 8589934592)
11/18/2011 10:44:10 AM Down, Request timed out (ICMP error # 11010)
11/18/2011 10:44:05 AM Warning, Request timed out (ICMP error # 11010)
Sensor Comments
Device Comments
Sensor Actions Check Now
Acknowledge Alarm...
Pause
Pause for 5 minutes
Pause for 60 minutes
Pause for 24 hours
Resume
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