Dial Herco

American District Telegraph or ADT is prime provider of fire alarms and electronic security system among other things. Initially a telegram service provided, the increased use and popularity of the telephone forces them to diversify into fire and burglar alarms business. By 1964, they had provided 80% of the central station alarm service in the United States. Today, ADT has branches in 50 countries with 62,000 employees. Their gross revenue was US$8 billion in 2008.

ADT now installs systems and monitors them through Customer Monitoring Centers. These centers receive electronic signals from the alarm device. Depending on the ADT Security System installed, an ADT monitoring specialist at the center can identify the nature of the emergency and decides the course of action. This specialist may make a verification phone call to the alarm site, or if an emergency is verified, may alert the police, fire or other emergency services. Thus purchasing ADT Security systems can be a real life saver.