Fundamentals of Telephony |
Contents
PREFACE | 1 |
ALTERNATINGCURRENT THEORY | 30 |
TELEPHONE SETS | 139 |
Copyright | |
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Common terms and phrases
alternating current alternating voltage alternating-current ampere amplifier antiresonance armature attenuation battery cable Calculate called line calling party capacitance carbon granules carrier systems cause central office characteristic impedance circuit of Fig coil common-battery components condenser connected connector contacts cord circuit crosstalk current flow cutoff decibels diaphragm direct current direct-current distant end distortion disturbing circuit electric electromotive force electrons energy equipment explained filter grid impressed voltage impulses indicated input impedance insulation line switch line wires lines of force load loading coils loss magnetic field measured milliamperes noise ohms open-wire line operator output parallel circuit permanent magnet phantom circuit plate previously reactance relay repeater repeating coil resistor ringers ringing selector series circuit shown in Fig shunt side band sidetone signal sound waves speech switchboard telephone circuits telephone line telephone receiver telephone set telephone systems telephone transmitter terminals transmission trunk vacuum tube vector voice-frequency voltage drop voltmeter volts