What type of alarm system can notify a central monitoring station?

A monitored alarm system is specifically designed to continuously alert a central monitoring station. This type of system utilizes communication technologies such as telephone lines, cellular networks, or internet connections to send signals from the alarm panels to the monitoring center in real-time. When an alarm is triggered, the monitoring station receives the notification and can take appropriate action, such as contacting emergency services or notifying the property owner.

In contrast, local alarm systems primarily sound an alarm on-site, such as a siren or alarm bell, but do not communicate with a monitoring station. Silent alarm systems may inform specific parties without audible alerting (e.g., sending signals discreetly), but these too typically do not connect to a monitoring service in the same manner as monitored systems. Unmonitored alarm systems function independently and do not send alerts to any external monitoring service whatsoever. Hence, the unique capability of the monitored alarm system to notify a central monitoring station makes it the correct answer.