What does an “alarm log” report?

An "alarm log" is a critical component of alarm systems, serving as a systematic record of all alarm events and activities. This log includes detailed documentation of when alarms were triggered, what caused the triggers, and any actions taken in response to the alarms. Such records are essential for monitoring system performance, investigating incidents, and evaluating response protocols.

The importance of maintaining an accurate and comprehensive alarm log cannot be overstated, as it aids in identifying patterns, troubleshooting issues, and ensuring compliance with regulatory requirements. This makes option B the most appropriate choice, as it encapsulates the essential function of the log in monitoring and managing security events.

While a list of authorized users is important for understanding who has access to the system, it does not provide the chronological record of alarm activity that the alarm log does. Similarly, information on equipment maintenance is crucial for the upkeep of the system, but it focuses on the operational status rather than documenting alarm incidents. Lastly, visual footage of all alarm triggers relates to image capture technologies, which might supplement the alarm log but does not encompass the full scope of events recorded within the log itself. Therefore, the alarm log serves a unique and vital role in capturing the history of alarm activities.