Telephone lines over the past several decades, had been widely used to link alarm systems to the central station for signal transmission and the criminals know it! Now, burglars routinely cut the telephone lines to homes and businesses, even whole neighborhoods, before breaking in. Plus, the telephone system itself is susceptible to problems caused by weather, accidents, equipment failures and natural disasters. Not to mention the recent changes in phone services, like (VOIP) Voice Over Internet Protocol, which are not reliable forms of communication for alarm systems or any data transmission, most of the time preventing alarm signals from going through to the central station. Phone networks were not originally designed with security in mind. Any of these problems could prevent your important alarm messages from reaching the central station, police, fire, and emergency response personnel.