Electrical Communication - Telephone Toll Service and Systems

Electrical Communication is a free textbook on the basics of communication technology. See the editorial for more information....

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Editorial Preface Download and Release History Copyright Early History of Electrical Communication Fundamentals of Acoustics Electrical Fundamentals of Communication Electroacoustic Devices Electric Networks Transmission Lines Cables and Wave Guides Electronic Applications in Communication Telegraph Systems Telephone Exchange Service and Systems Telephone Toll Service and Systems Introduction Typical Toll Connection Toll Trunking Methods Toll Operating Methods Toll Switching Plans Toll Switching Equipment Nationwide Dialing Telephone Repeaters Early Telephone Repeaters Vacuum-Tube Telephone Repeaters The Hybrid Coil The 21-Type Repeater The 22-Type Repeater Four-Wire Repeater The V1 Repeater Repeater Applications Echo Suppressors Balancing Networks Attenuation Equalizers Delay Equalizers Carrier Telephony Analysis of an Amplitude- Modulated Wave Types of Carrier Telephone Systems Type A Carrier Telephone System Type B Carrier Telephone System Type C Carrier Telephone Systems Type D Carrier Telephone System Type G Carrier Telephone System Type H Carrier Telephone System Multichannel Carrier Telephone Systems Type J Carrier Telephone System Type K Carrier Telephone System Type L Coaxial Cable Carrier Telephone Systems Miscellaneous Carrier Systems References Review Questions Problems Radio Wave Propagation and Antennas Radio Systems Interference and Noise

Last Update: 2011-06-06