What is the key function of a security alarm system?

The key function of a security alarm system is to detect unauthorized entry and alert the property owner or authorities. This primary capability is crucial for enhancing security measures in both residential and commercial settings. When an alarm system is triggered by unauthorized access, it serves as an immediate notification to the occupants and can connect to law enforcement agencies, ensuring a prompt response.

Effective security alarms are designed with sensors that monitor entry points—such as doors and windows—and can differentiate between normal and suspicious activities. Once an intrusion is detected, the alarm is activated, which not only notifies the property owner but can also initiate a response protocol, like dispatching security personnel or police, thereby minimizing potential damage or theft.

While visible deterrents, like security cameras and signage, can discourage crime, they do not provide real-time alerts as an alarm system does. Record-keeping of employee activities or surveillance over parking lots may be functions related to other security measures, but they do not encapsulate the core purpose of a traditional security alarm system which focuses on immediate detection and alerting.