Sonitrol Announces Purchase of Crossville Dealership

(July 5, 2005) Sonitrol Corporation Sonitrol Corporation, the leader of audio verified commercial security in North America, has purchased a Crossville, TN, Sonitrol Security franchise from William and Phyllis Evans.

Kevin Dowd, Chairman and Chief Executive Officer of Sonitrol, made the purchase announcement.Sonitrol of Crossville, TN, having a solid customer base, provides security services to Eastern Tennessee, and the new property borders existing Sonitrol company-owned branch territories in Tennessee. Account monitoring will be seamlessly transitioned to Sonitrol's Baltimore Central Station with attention focused on continued quality service to our new Sonitrol customers.

Sonitrol's General Manager of Atlanta, GA, Bobby Keith, will oversee the sales and operations for this region. "This expands our Tennessee presence beyond Memphis, Chattanooga and Nashville, and confirms our commitment to be the leader in audio verified electronic security," said Kevin Dowd, Sonitrol's CEO.

"Crossville will add to our customer base, which will benefit from up to date products and state of the art service. This location is contiguous to our existing footprint in Tennessee," said Dowd. "This acquisition will increase and enhance our general business coverage. We are extremely optimistic about the future of Sonitrol and think that the marketplace in poised to embrace audio verification as more municipalities strengthen their response standards and implement false alarm ordinances."

About Sonitrol:
Sonitrol Corporation is the leading provider of Verified Response security solutions for businesses and schools in North America. Founded by a policeman, the company's technology was created to reduce false alarms and increase apprehensions. Sonitrol's proprietary audio verification capability has assisted local law enforcement in the apprehension of more than 155,000 suspects since 1977. Its integrated suite of offerings includes audio intrusion alarms, access control, video surveillance and fire detection. For more information on Sonitrol and its integrated security solutions, please visit the company's website at www.sonitrol.com.