What are intrusion detection systems called when they only alert individuals within close proximity to the alarm?

The correct answer is local intrusion systems because these systems are designed to provide alerts primarily to individuals who are in the immediate vicinity of the alarm. Local intrusion systems typically utilize audible alarms or visual indicators to bring attention to a security event, signaling to those nearby to respond. This immediacy is crucial in scenarios where prompt action might mitigate threats or address potential breaches.

In contrast, central monitoring systems often relay information to a remote security team or a central monitoring station rather than just alerting local personnel. Remote intrusion systems may be designed to send alerts over long distances, including phone notifications or internet-based notifications, which is not limited to proximity. Integrated security systems encompass a range of security measures, including surveillance cameras, access control, and alarms, but do not specifically refer to those that only alert nearby individuals. Thus, local intrusion systems best fit the description posed by the question.