ESA Certified Alarm Technician Practice Exam

Which component is essential for a digital communicator's operation in residential systems?

1. An active communication path

2. A backup power source

3. A surveillance camera

4. A dedicated phone line

The correct answer is: An active communication path

In the context of a digital communicator in residential alarm systems, the essential component for its operation is an active communication path. This means that the digital communicator must have a reliable way to connect with the central monitoring station or other destinations to relay alarm signals or status updates. The active communication path ensures that signals can be sent and received appropriately, enabling the system to function effectively in alerting authorities in case of an intrusion or emergency. While other options like a backup power source and a dedicated phone line may enhance the functionality or reliability of the system, they are not strictly essential for the basic operation of the digital communicator. A backup power source is important for maintaining operation during power outages, but without an active communication path, the communicator would not be able to send any information, defeating its purpose. Similarly, a dedicated phone line can facilitate communication but is not always necessary since digital communicators can also connect via cellular or internet protocols. Thus, the active communication path remains the fundamental requirement for the communicator's operation.