The purchase price for the assets of ADT OM was not disclosed, but the assets of ADT OM were worth $6 million. ADT OM monitors convicted criminals for localities through the use of ankle bracelets and other equipment. Tyco has been trimming some of its security properties in a two-year-long restructuring that has included the sales of Sonitrol, National Alarm Computer Center (NACC) and Tri-Ed Distribution.