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wrote...
Posts: 193
A week ago
What are the three components of any alarm system?
Textbook 

Introduction to Security: Operations and Management

Edition: 5th
Authors:
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wrote...
Posts: 213
A week ago
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Every alarm system consists of three basic components: (1) a triggering, initiating, or activation device, or a sensor (detector) that detects a condition; (2) an alarm system circuit that transmits information; and (3) an annunciator (signal) that notifies the recipient of the detected condition.
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