- Communications: Data communication with the main controller
- Phone Calls: Voice communication with home devices, lobby entry phones & other guardroom controllers
- Receipt of status info: Fire, gas leakage, buglar, emergencies & "absence mode"
- Storage & Display of Statue Info: Displays, stores (up to 250 events) & prints received information
- Self-diagnosis: Checks data communications and channel connections of the whole system to address problems at earlier stage.