ADT Security Services has come a long way since it was founded as American District Telegraph in 1874. ADT provides services such as fire protection, access control, alarm monitoring, medical alert system monitoring, video surveillance, and intrusion detection. Its ADT Pulse provides remote security control. The security services company has about 7 million commercial, residential, and government customers, as well as sales and service offices in some 350 communities throughout North America. The company offers services to customers through its authorized ADT dealer network. ADT Security Services is part of ADT Worldwide, itself a unit of conglomerate Tyco International.