D-Link DES-3226 User Manual page 69

The alarm group periodically takes statistical samples from variables in
the probe and compares them to previously configured thresholds.
If the monitored variable crosses a threshold, an event is generated. A
hysteresis mechanism is implemented to limit the generation of alarms.
This group consists of the alarmTable and requires the
implementation of the event group.
The Event Group
The event group controls the generation and notification of events from
this device. This group consists of the event Table and the log Table.
Use the Add and Modify function to add an index or change a selected index's
variables. Clicking the Add or Modify button will bring up the Control Table
pop-up menu. The Control Table pop-up screen is used to input index variables.
Statistics information displayed may be frozen at any point and resumed using
the Start and Stop buttons.
DES-3226 Management 65