ISDN (Integrated Services Digital Network) is a forward-looking telecommunication network that accommodates both present and future information movement needs. The goal of ISDN is to have one common network to move all types of information (text, music, images, video, fax). The author discusses just how important this technology is, and how it will affect the future of telecommunications. His book gives a broad, even treatment of the perspectives necessary to understand ISDN. It includes a technical overview, a historical evolutionary view, and discusses the legal issues and regulations involved.