Digital TelephonyAn 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. |
Contents
CHAPTER ONE BACKGROUND AND TERMINOLOGY | 1 |
CHAPTER TWO WHY DIGITAL? | 64 |
CHAPTER THREE VOICE DIGITIZATION | 83 |
Copyright | |
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Common terms and phrases
A-law amplitude amplitude modulation analog arrival assumed average bandwidth baseband basic Bell System binary bit rate blocking probability carrier CCITT channel banks circuit-switched clock code word coder coherent demodulation companding connection crosspoints data communications data rate decoder delta modulation demodulation designed detector determined digital signal digital switch digital transmission division multiplexing elastic store encoding Equation equipment erlangs error rate example filter flow control four-wire frequency function Hence IEEE implemented input interface intersymbol interference jitter kbps line code linear linear code loop maximum node noise power occur offered load output packet packet-switching network path phase pulse quantization interval queue radio receiver referred routing sample value segment shown in Figure signal interval slot spectrum speech subnetworks synchronization techniques telephone network terminal tion traffic intensity transmission links transmission system transmitted trunk group users virtual circuit vocoders w x y z waveform