TAILIEUCHUNG - Introduction to Telecommunications Network Engineering - Kỹ thuật viễn thông mạng

Telecommunications is one of the fastest growing business sectors of modern information technologies. A couple of decades ago, to have a basic understanding of telecommunications, it was enough to know how the telephone network operated. Today, the field of telecommunications encompasses a vast variety of modern technologies and services. Some services, such as the fixed telephone service in developed countries, have become mature, and some have been exploding (., cellular mobile communications and the Internet). The deregulation of the telecommunications industry has increased business growth, even though, maybe because, tariffs have decreased. | Introduction to Telecommunications Network Engineering Second Edition Tarmo Anttalainen Artech House Boston London Contents Preface xv Acknowledgments__xix 1 Introduction to Telecommunications 1 What Is Telecommunications 1 Significance of Telecommunications 1 Historical Perspective 3 Standardization 7 Standards Organizations 9 Interested Parties 10 National Standardization Authorities 11 European Organizations 11 American Organizations 12 Global Organizations 13 Other Organizations 14 Development of the Telecommunications Business 15 v vi Introduction to Telecommunications Network Engineering Problems and Review Questions 17 References 17 2 The Telecommunications Network An Overview 19 Basic Telecommunications Network 19 Transmission 20 Switching 20 Signaling 21 Operation of a Conventional Telephone 22 Microphone 22 Earphone 23 Signaling Functions 23 Signaling to the Exchange from the Telephone 24 Setup and Release of a Call 24 Rotary Dialing 25 Tone Dialing 26 Local Loop and 2W 4W Circuits 28 Telephone Numbering 30 International Prefix 31 Country Code 31 Trunk Code Trunk Prefix or Area Code 32 Subscriber Number 32 Operator Numbers 32 Switching and Signaling 33 Telephone Exchange 33 Signaling 34 Switching Hierarchy 37 Telephone Call Routing 38 Local-Access Network 41 Local Exchange 42 Distribution Frames 43 Trunk Network .

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