Best-selling author WilIiam Stallings .provides an in-depth preseqtation of the technology and architecture of integrated services digital networks (ISDN). ISDN and Broadband ISDN With Frame Reler and ATM covers the integrated digital netWork (IDN), ISDN services, architecture, signaling system no. 7 (SS7) and includes a comprehensive treatment of the ITU-T protocol standards. Detailed coverage of protocols and congestion control strategies fOr both frarne relay and ATM are also provided.

Perhaps the most important development in the computer-communications industry in the 1990s is lhe evolution of the integrated services digital network(ISDN) and its follow-on,the broadband ISDN (B-ISDN). The ISDN and B-lSDN have had a dramatic impact on the planning and deployment-of intelIigent digital networks providing integrated service for voice. data, and video,Further,the work on the ISDN and B-ISDN standards has led to the development of two major new networking technologies: frame relay and asynchronous transfer mode (ATM). Frame relay and ATM have become the essential ingredients in developing high-speed networks for local, metropolitan, and wider area applications.
　　
INTENDED AUDIENCE
　　This book is intended for a broad range of readers who will benefit from an understanding of ISDN and B-ISDN concepts and the associated technologies of frame relay and ATM.This includes students and prolessionals in the fields of data processing and data commumications, designers and implementers, and data communication and networking customers and managers.The book is designed to be self-contained. For the reader with little or no background in data commumcations, Part One and the appendices cover a number of basic topics.
　　
PLAN OF THE TEXT
　　The objcctive of this book is to provide a comprehensive technical survey of the protocols and architecture of ISDN and B-ISDN, including a detailed examination of frame relay and ATM.
　　The book divides into tive parts. Part One deals with the fundanlentaI technologies used in digital networks, including a discussion of digital transmission technology and a review of circult switching and packet swilching.Part Two is devoted to lSDN and examines the user-network intcrface architecture, protocols, and services. This part also describes Signaling System Number 7, a related facility. Part Three focuscs on frame relay technology and protocols and examines the critical issue of congestion control in frame relay networks. Part Four covers B-ISDN architecture and protocols. Part Five examines ATM-related protocols and surveys various techniques for traffic and congestion control in ATM networks.
The book includes an extensive glossary, a list of frequently used acronyms,and a bibliography. Each chapter includes problems and suggestions for further reading.
Throughout, there is an emphasis on both technology and on standards. The book provides a comprehensive guide to understanding the many recommendations issued by the ITU Telecommunication Standardization Sector (ITU-T), formerly the CCITT.
　　
INTERNET SERVICES FOR INSTRUCTORS AND STUDENTS
　　There is a Web page for this book that provides support for students and instructors. The page includes links to relevant sites, transparency masters of figures in thebook in PDF (Adobe Acrobat) format, and sign-up information for the book's inter-net mailing list. The Web page is at http://www.shore.net/~ws/ISDN4e. An Internetmailing list has been set up so that instructors using this book can exchange infor-mation, suggestions, and questions with each other and with the author. As soon astypos or other errors are discovered, an errata list for this book will be available athttp://www.shore.net/~ws.
　　
WHAT'S NEW IN THE FOURTH EDITION
　　In the four years since the third edition of this book was published, the field has seencontinued innovations and improvements. In this new edition, I try to capture thesechanges while maintaining a broad and comprehensive coverage of the entire field.To begin this process of revision, the third edition of this book was extensively reviewed by a number of professors who teach the subject. The result is that, inmany places, the narrative has been clarified and tightened, and illustrations havebeen improved. Also, a number of new "field-tested" problems have been added;the solutions manual, available to instructors, includes solutions to all of the problems in the book.
　　Two noteworthy changes in this edition are the inclusion of xDSL and theexpansion of the coverage of ATM. The term xDSL refers to a family of digital subscriber line technologies that provide high-speed access to ISDN and other wide area networks over ordinary twisted-pair lines from the network to a residential or business subscriber. The book surveys xDSL and especially asymmetric digital subscriber line (ADSL) technology. Another important change is the expansion of the coverage of ATM. This includes additional details on the ATM adaption laver (AAL), treatment of the new available bit rate (ABR) service, and updated and expanded treatment of ATM traffic and congestion control.
　　Other changes permeate the book. The third edition was based on the ITU-T recommendations through mid-1994. Since that time, most of these older recommendations have been updated and new ones have been added. In addition, the ATM Forum has filled in many of the gaps in the ITU-T specification of ATM and related protocols. These changes are reflected throughout the book. To aid readers in keeping up with this evolving field, pointers to relevant Web sites are found in the Recommended Reading section of many chapters.
　　
ACKNOWLEDGMENTS
　　This new edition has benefited from review by a number of people, who gave generously of their time and expertise. I would like to thank Pierre Catala, Texas A&M;Thomas Gannon, Worcester Polytechnic Institute; Elsa Valeroso, University of North Dakota; Subbarao Wunnava, Florida International University; Ibrahim Habib, City College of NY; Robert Blackshaw,GeoTrain Corporation; Tawfig Alrabiah, University of Pittsburgh; Teik Kheong Tan, TTK Consulting; Kenneth Molloy, KM Associates Inc.

Chapter 1 Introduction
1.1 The Arrival of ISDN
1.2 The Computer-Commputer-Communication Revolution
1.3 from Communications to Computers
1.4 From Computers to Communications
1.5 Outline of This Book
PART ONE DIGITAL COMMUNICATIONS
FUND AMENTALS
Chapter 2 Digital Trattshossion
2.1 Analog and Digital Data Transmission
2.2 Digital Encoding of Analog Data
2.3 Multiplexing
2.4 Digital Carrier Systems
2.5 Summary
2.6 Recommended Reading
2.7 Problems
Chapter 3 Line Coding and the Subscriber Line
3.1 Subscriber Line Technology
3.2 Line Coding Techniques
3.3 The U Interface
3.4 Quadrature Aniplitude Modulation
3.5 Asymmetric Digital Subscriber Line
3.6 xDSL
3.7 Summary
3.8 Recommended Reading
3.9 Problems
Appendix 3A: Scrambling and Descrambling
Chapter 4 Communication Networks
4.1 Switching Techniques
4.2 Circuit Switching
4.3 Routing for Circuit-Switching Networks
4.4 Control Signaling for Circuit-Switching Networks
4.5 Packet Switching
4.6 X.25, 80
4.7 Comparison of Circuit and Packet Switching
4.8 Other Switching Techniques
4.9 Summary
4.10 Recommended Reading
4.11 Problems
PART TWO INTERATED SERVICES
DIGITAL NETWORKS
Chapter 5 ISDN Overview
5.1 The Integrated Digital Network
5.2 A Conceptual View of ISDN
5.3 ISDN Standards
5.4 Recommended Reading
5.5 Problems
Appendix 5A: ITU Telecommunications Standardization Sector
Appendix 5B' ITU-T Recommendations on ISDN
Chapter 6 ISDW Intefaces and Functions
6.1 Transmission Structure
6.2 User--Network Interface Configuration
6.3 ISDN Protocol Architecture
6.4 ISDN Connections
6.5 Addressing
6.6 Interworking
6.7 Summary
6.8 Recommended Reading
6.9 Problems
Appendix 6A: ISDN Elementary Functions
Chapter 7 ISDN Physical Layer
7.1 Basic User-Network Interface
7.2 Primary Rate UserNetwork Interface
7.3 U Interface
7.4 Summary
7.5 Problems
Chapter 8 ISDN Data Link Layer
8.1 LAPD
8.2 Terminal Adaption
8.3 Bearer Channel Data Link Control Using I.465/V.120
8.4 Summary
8.5 Recommended Reading
8.6 Problems
Chapter 9 ISDN NetWork Layer
9.1 Overview
9.2 Basic Call Control
9.3 Control of Supplementary Services
9.4 Summary
9.5 Recommended Reading
9.6 Problems
Cgapter 10 ISDN Services
10.1 Service Capabilities
10.2 Bearer Services and Teleservices
10.3 Basic and Supplementary Services
10.4 Summary
10.5 Problems
Chapter 11 Signaling System Number 7
11.1 SS7 Architecture
11.2 Signaling Data Link Level
11.3 Signa1ing Link Level
11.4 Signaling Network Level
11.5 Signaling Connection Control Part
11.6 ISDN User Part
11.7 Summary
11.8 Recommended Reading
11.9 Problems
Appendix 11A: Service Primitives and Parameters
Appendix 11B: ITU-T Recommendations on SS7
PART THREE FRAME RELAY
Chapter 12 Frame Relay Protocols and Seedces
12.1 Background
12.2 Frame-Mode Protocol Architecture
12.3 Frame-Mode Call Control
12.4 LAPF
12.5 Summary
12.6 Recommended Readings
12.7 Problems
Chapter 13 Frame neIay Congestion Control
13.1 Congestion in Frame Relay Networks
13.2 Approaches to Congestion Control
13.3 Traffic Rate Management
13.4 ExpIicit Congestion Avoidance
13.5 Implicit Congestion Control
13.6 Summary
13.7 Recommended Reading
13.8 Problems
PART FOUR BROADBANO ISON
Chapter 14 Broadband ISDN Architecture
14.1 B-ISDN Standards
14.2 Broadband Services
14.3 Requirements
14.4 Architecture
14.5 Summary
14.6 Recommended Reading
14.7 Problems
Chapter 15 Broadband ISDN Protocols
15.1 B-ISDN Protocol Reference Model
15.2 B-ISDN Physical Layer
15.3 SONET/SDH
l5.4 Summary
15.5 Recommended Reading
15.6 Problems
Appendix 15A: 4B5B/NRZI Coding
PART FIVE ASYNCHRONOUS TRANSFER MODE
Chapter 16 ATM Protocols
16.1 Asynchronous Transfer Mode
16.2 Transmission of ATM Cells
16.3 ATM Adaptation Layer
16.4 Summary
16.5 Recommended Reading
16.6 Problems
Chapter 17 ATM Traffic and Congestion Control
17.1 Requirements for ATM Traffic and Congestion Control
17.2 ATM Service Categories
17.3 ATM Traffic-Related Attributes
17.4 Traffic Management Framework
17.5 Traffic Management
17.6 ABR Traffic Management
17.7 Recommended Reading
17.8 Problems
Appendix A Flow Control, Error Detection, and Error Control
A.1 Flow Control
A.2 Error Detection
A.3 Error Control
Appendix B The OSI ffeference Model
B.1 Motivation
B.2 Concepts
B.3 Standardization within the OSI Framework
B.4 Layers
Glossary
References
Index

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