Abstract: A method of operating a perimeter security system comprises monitoring a perimeter for a plurality of events, receiving an event signal for an event of the plurality of events wherein the event signal comprises an acceleration, processing the first event signal to determine if the event is a threat, transferring a confirmation request to confirm that the event is a threat in response to determining that the event is a threat, receiving a confirmation response in response to the confirmation request confirming that the event is a threat, and generating and transmitting a message identifying the event in response to confirming the threat.