Once the alarm signal is sent to the central station, they take predetermined actions based on a protocol made by the customer. For example, the protocol might be to call the business owner first, the VP second, and then call the police if they are both inaccessible. A common protocol for a home security system is to call the homeowners cellular and home, and to only take action when directed. This prevents false alarms, but can be dangerous if the homeowner is not always around their cellular.

The entire transaction is recorded by the central station, so in case there are any issues with the following of the protocol.