In today’s world, major business and hospitality organisations strongly suggest that their properties use call accounting systems, and many require that their systems are up-to-date and accurate. They do this for four main reasons: (1) to recover the cost of long-distance calls, (2) to properly allocate, account for, and charge customers for phone usage, (3) to generate revenue through the resale of phone calls, and (4) to track phone calls made to and from their property for marketing, planning, and other purposes, and especially for handling and tracking emergency calls.