The term telecommunications generally refers to all types of long-distance communication that use common carriers, including telephone, television, and radio. Data communications is a subset of telecommunications and is achieved through the use of telecommunication technologies. In modern organizations, communications technologies are integrated. Businesses are finding electronic communications essential for minimizing time and distance limitations.Telecommunications plays a special role when customers, suppliers,vendors,and regulators are part of a multinational organization in a world that is continuously awake and doing business somewhere 24 hours a day,7 days a week (“24/7”).Figure T4.1 represents a model of an integrated computer and telecommunications system common in today’s business environment.