A visual indicator that displays several zones or buildings from which an alarm signal has originated is called a(n):

A visual indicator that displays several zones or buildings from which an alarm signal has originated is called an annunciator. This device plays a crucial role in alarm systems by providing immediate visual feedback about the status of the various protection areas being monitored. An annunciator typically consists of lights or indicators that light up when an alarm is triggered in a specific zone, allowing security personnel to quickly identify the source of the alarm.

This capability is important for effective security management, as it allows for prompt response and assessment of potential threats. In contrast, a zone alarm panel is more focused on monitoring individual zones without necessarily providing a consolidated visual summary of alarms across multiple areas. Contact and break alarm panels are typically designed for specific types of alarm inputs (like door contacts or glass breaks), rather than offering an overview of alarm signals across different zones. Thus, the functionality and design of an annunciator make it the correct answer in this context.