An introduction to the new digital techniques of telephone communication networks, with emphasis on voice applications: voice digitization, digital transmission, digital switching, network synchronization, network control, and network analysis. Presents basic theory and stresses the application and operational aspects of communication systems design. Relates system level design considerations to telephone networks around the world, particularly in North America.
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CHAPTER ONE BACKGROUND AND TERMINOLOGY
CHAPTER TWO WHY DIGITAL7
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analog attenuation average bandwidth baseband basic Bell System binary bit rate blocking probability cable carrier CCITT channel bank clock code word coder communications companding connection crosstalk data rate decoder delay delta modulation density designed detector determined digital signal digital switching digital transmission division multiplexing echo suppressors elastic store encoding Equation equipment error rate filter four-wire four-wire circuit framing frequency functions Hence IEEE implemented inlet input interface intersymbol interference jitter line code linear loop microwave node noise power occur operation output packet packet-switching pair path phase phase detector power level pulse quadrature quantization intervals ratio receiver referred shown in Figure signal interval signal power signal-to-noise ratio slot space stage specific spectrum speech switching matrix synchronization T-carrier techniques telephone network tion traffic transmission link transmission system transmitted trunk group two-wire vocoder voice circuits waveform zero