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Chapter 7: Operation
79
Chapter 7: Operation
After installation and programming is completed, the
Model 1108 is fully operational. This chapter explains the
sequence of events that occur during an alarm dialout to
illustrate how the Model 1108 operates.
7.1 Alarm Detection, Dial-out and Acknowledgment
Generally, an alarm event is structured in the following
manner:
I. The Model 1108 detects an alert condition due to
a change at the sensor.
II. A valid alarm is recognized.
III. Dial-out begins.
IV. The alarm is acknowledged.
Often, an alarm does not proceed through all stages: either an
alert condition does not persist long enough to be considered
valid, or a valid alarm is cancelled.
The table on the following page explains the alarm detection,
dial-out and acknowledgment features and lists important
variable factors affecting their operation.