How people communicate with one another has undergone enormous changes in the last few years — and as a result, the home phone line that for decades was a cornerstone of customers’ alarm systems has begun to seem like an endangered species. According to the Federal Communications Commission, about two-thirds of U.S. homes now have a broadband connection such as DSL or a cable modem. And increasing numbers of Americans are also using that connection to support voice service using VOIP. Combine this with the near-ubiquity of cell phones and we now have a situation where many households have no traditional telephone.