CIP identifies Stallings as the author rather than the editor although this tutorial is a combination of original material and reprinted papers, a sequel to Integrated services digital networks, 2d ed. (1988), with a broadened scope. The concepts of ISDN are introduced along with an overview of its

An introduction to "ISDN" which brings the technology up-to-date, incorporating developments in "ATM", "SDH" and Broadband "ISDN". This book is suitable for self-learning communications professionals and applied courses in communications management and technology, and advanced undergraduates and graduates in computing and electronics.

What is "digital telephony"? To the authors, the term digital telephony de notes the technology used to provide a completely digital point-to-point voice communication system from end to end. This implies the use of digital technol ogy from one end instrument through the transmission facilities and switching centers to another end instrument. Digital telephony has become possible only because of the recent and ongoing surge of semiconductor developments allowing microminiaturization and high reliability along with reduced costs. This book deals with both the future and the present. Thus, the first chapter is entitled, "A Network in Transition." As baselines, Chapters 2, 3, and 10 provide the reader with the present status of telephone technology in terms of voice digitization as well as switching principles. The book is an outgrowth of the authors' continuing engineering education course, "Digital Telephony," which they have taught since January, 1980, to attendees from business, industry, government, common carriers, and tele phony equipment manufacturers. These attendees come from a wide variety of educational backgrounds. but generally have the equivalent of at least a bachelor's degree in electrical engineering. The book has been written to provide both the engineering student and the practicing engineer a working knowledge of the principles of present and future voice communication systems based upon the use of the public switched network. Problems or discussion questions have been included at the ends of the chapters to facilitate the book's use as a senior level or first year graduate level course text.

This text presents a detailed outline of ISDN, reflecting recent advances in the telecommunications industry due to digital technology. Describes the design, application, and operation of an integrated network carrying and switching voice, data, text, and facsimile services. Treatment is practical, not theoretical, drawing on experience gained from actual applications of ISDN. Explains the state of the art, the network development most suited to ISDN, national and international standard agreements necessary to make ISDN possible on a large scale, and what the future holds for integrated networks.