ISDN技术丛书(影印版)-宽带网络信令

ATM信今是B—ISDN网络的神经系统，本书是第一本全面系统介绍宽带网络信今系统的专著。为便于读者理解宽带网络信今，本书首先对N—ISDN信令和No．7信令的思想方法作了介绍，并比较了N—ISDN和B-ISDN的技术差别，给出了ATM信今系统的基本结构。在此基础上详细地讲述了ATM信令适配层协议(包括SAAL，SSCoP和SSCF)，B—ISDN的UNI接口信令和B—ISUP信令等。还讨论厂宽带信令的新技术(如点到多点呼叫等)，并分析了专用网络—网络接口(PNNl)协议。 本书适合于高等学校研究生和高年级个科生作为教学参考书，也可供从事电信和计算机通信专业的广大科技人员阅读。

Preface xv
CHAPTER 1 Introduction
Introduction 1
Purpose of a Signaling System 1
Transpon Systems and Signaling Systems 2
The Blurring of the Distinction between Transport and Signaling Networks 3
Narrowband Signaling Transpon and Networks 3
The TI System 3
X.25 and Packet Switching Systems 4
SS7 Systems 6
Problems with Narrowband Signaling 6
Broadband Signaling Networks 6
Why Not Just Use SS7? 7
Summary 7
CHAPTER 2 ISDN and B-ISDN Architecture 8
Introduction 8
Interfaces and Functional Groupings 8
Reference Points 10
ISDN Logical Channel Concept 11

This book is one in a series of books called Advanced Gommunications Technologies. It is a companion book to ATM: Foundation for Broadband Networks. In the first volume, a chapter was devoted to ATM-based signaling operations at the UNl. Since the publication of that book, there has been an increased interest in the industry in signaling, both at the user-network interface (UNI) and the network-network interface (NNI).In addition, most of the specifications that define broadband signaling have now been released, and were not available ..