Ch. 1 The Telephone System--About This Chapter, The Telephone Set, The L ocal Loop, The Public Switched Telephone Network, Types of Transmissions , Switching Systems, Transmission System Facilities, System Operating Co nditions, Telephone Equipment Registration, Ch. 2 The Conventional Telep hone Set About This Chapter, Switchhook, Pulse Dialing, Anti-Tinkle and Speech Muting, Tone Dialing, Transmitter, Receiver, Electromechanical Ri nger, The Hybrid Function, The Electronic Telephone, What Have We Learne d?, Quiz; Ch. 3 Electronic Speech Circuits About This Chapter, DC Requir ements for the Local Loop, Two-Way Speech Block Diagram, Protection Circ uits, Speech Circuit, DC Line Interface, Transmitter Section, Receiver S ection, Line Balancing, Telephone Set Volume Compensation, Availability and Characteristics of Integrated Circuit Speech Networks, What Have We Learned?, Quiz; Ch. 4 Electronic Dialing and Ringing Circuits-- About Th is Chapter, Dial Pulse Generation Using Integrated Circuits, Circuit Pow er and Voltage Transients, Pulse Dialer, DTMF Dialing Using Integrated C ircuits, Combined Dialers, Electronic Ringer, Electronic Ringer Implemen