Alarms can be added, removed and edited from both the "Traffic Statistics" and the "Main" tab. Triggered alarms are treated as statistics data. This means they are stored when the probe is reset, and can later on be viewed in the "Traffic Log" tab. When the probe is stopped triggered alarms are lost. Defined alarms are not affected by resetting or stopping the probe, they exist until they are deleted by the user. There exists two types of alarms: absolute alarms, and delta alarms.

Absolute alarms

An absolute alarm will be triggered when the monitored entries value for the given field increases over a specified trigger value. Once the alarm is triggered it will not trigger again until the probe is reset.

Delta alarms

A delta alarm is triggered when the monitored entries delta value for the given field is larger than a specified value. For each sampling time there is taken a sample of the monitored entries value for the given field. If the difference of the two last samples taken is larger than the specified trigger value for a upper trigger type alarm, or lower than the specified trigger value for a lower trigger type alarm, the alarm is triggered.

Delta alarms can have upper or lower trigger type. A delta alarm with trigger type upper is triggered when the monitored entries delta value for the given field is larger than the specified trigger value. Once triggered, the alarm will not be triggered again if there is no lower trigger value set. Set a lower trigger value also to reset the alarm when the monitored entries delta value for the given field is smaller than the lower trigger value. If this happens, the alarm can be triggered again.

A delta alarm with trigger type lower is triggered when the monitored entries delta value for the given field is smaller than the specified lower trigger value. If an upper trigger value is set also the alarm can be triggered multiple times. If the monitored entries delta value for the given field is larger than the specified upper trigger value the alarm can be triggered again.