Exhibit 21 Subsidiary List Name State of Incorporation/Formation - ---- -------------------------------- Criticom International Corp. New Jersey Monital Signal Corp. New Jersey Morlyn Financial Group, LLC New Jersey Payne Security Group, LLC New Jersey Guardian Group, Inc. New Jersey Integrated Alarms Services, Inc. Delaware Madison Protection, Inc. Delaware Palisades Group, LLC New York Integrated Alarm and Security, LLC New Jersey Alert Alarm Company, Inc. California American Burglar and Fire Alarm Co. New Mexico Norco Alarm, Inc. California Security General Corp. California American Home Security, Inc. Nevada Shield Signal Corp. California Teleguard Security Systems, Inc. California Walter Breese, Inc. California Everest Video Systems, LLC Delaware LLC - 50% membership