What is the scanning process in a fire alarm system?

The scanning process in a fire alarm system refers to the continuous monitoring of devices for any changes in their status. This process is essential because it allows the fire alarm system to detect conditions such as smoke, heat, or a triggered manual pull station. By actively scanning the status of each connected device, the system can promptly identify and respond to potential fire hazards.

Monitoring for changes involves checking whether a device is in a normal state or if it has recognized a problem that could indicate the presence of a fire. This capability is vital for effective fire detection and ensuring timely alerts to occupants and emergency services.

The other options do not represent the scanning process: testing alarm sirens focuses on ensuring that the alarm sounds are functioning, checking battery power levels is about maintaining the system's reliability, and communicating with emergency services is the next step after an alarm is triggered. Each of these functions is important for the overall operation of the fire alarm system but does not define the scanning process itself.