Voice over Internet Protocol (VoIP) is a technology that allows users to establish telephone calls over a data network by converting an analog voice signal into a set of digital signals, which are then sent over an Internet connection in the form of packets with IP addresses. Although not new, this technology has now reached a state of maturity and quality that allows its application in production environments through interconnection with conventional telephone systems. Similarly, the supply of equipment and services from carriers has been growing exponentially.