This book covers all aspects of telephony over IP networks, known as Voice over IP (VoIP). VoIP hit the headlines during the mid-1990's amid claims concerning its impact upon existing Switched Circuit telephony services. Whilst VoIP has clearly provided a focus for much debate within the telecommunications industry, there has been a clear gulf between hype and reality. This book examines VoIP as a technology and its consideration within the industry, the motivations for VoIP networks, a review of the status of the major components of a VoIP network and their development, and both current and emerging applications. This makes for essential reading for those with a technical or business interest in this rapidly developing area of telecommunications.
Richard Swale is currently chief VoIP technologist within BTexact Technologies. He is also a contributor to the VoIP work in the IETF and a working group chair of ETSI's TIPHON project. He is responsible for setting technology assessment standards as well as various consulting activities, including BT's customerfacing account teams. He began his career as an apprentice at BT Laboratories and subsequently graduated from the University of Kent with a first class Honours degree in Electronic Engineering. Since then he has worked on data networks using IP protocols, CTI systems and intelligent network applications. After leading a group researching the application of high performance distributed computing, he then led the emerging development activity on VoIP, bringing together the multidisciplinary engineering team that delivered the BT Group's first network trial of VoIP in 1997. Since then, he has been involved with a number of VoIP projects including the launch of BT's first public VoIP services.