Lifeline Systems, Inc. provides 24-hour personal emergency response monitoring services and related products primarily to elderly or disabled individuals in the United States and Canada. The company’s products and services consist principally of a home communicator connected to the telephone and a wireless personal help button which, when activated, initiates an automated digital telephone signal to one of its centralized monitoring facilities. It also offers a Lifeline emergency call system, which utilizes the company’s call button pendants; two-way voice or nonvoice communicators; and software for senior living customers. As of December 31, 2005, Lifeline Systems monitored approximately 469,000 subscribers in Framingham, Massachusetts; Toronto, Ontario; and Montreal, Quebec. The company’s customers primarily include senior and assisted living facilities, managed group homes, managed continuing care retirement communities, community hospitals, and health care providers. Lifeline Systems was founded by Andrew Dibner and Susan Dibner in 1974 and is headquartered in Framingham, Massachusetts. As of March 23, 2006, Lifeline Systems Inc. is a subsidiary of Koninklijke Philips Electronics NV.