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CONTENTSPreface to the Second EditionxiiiChapter 1 Introduction to Telecommunications 11.1 Telecommunication Networks 21.2 Numbering Plans 91.3 Digit Analysis and Routing 131.4 Analog Transmission 171.5 Digital Transmission 231.6 Special Transmission Equipment 281.7 Exchanges 341.8 Access Networks and Line Concentrators 381.9 Acronyms 401.10 References 41Chapter 2 Introduction to Signaling 432.1 Overview 432.2 Standards for Signaling Systems 492.3 Acronyms 512.4 References 52Chapter 3 Subscriber Signaling 553.1 Basic Subscriber Signaling 553.2 Signaling Components in Telephones 573.3 Signaling Equipment at the Local Exchange 603.4 Tones, Announcements, and Ringing 643.5 Subscriber Signaling for Supplementary Services 67vii

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