The Beginning of Electric Telegraphy
The first transmitters and receivers The electric telegraph did not burst suddenly upon the scene…
Switching
Switching, in communications, equipment and techniques for enabling any station in a…
Multiple Access
Multiplexing is defined as the sharing of a communications channel through local…
Time-division multiplexing
Multiplexing also may be conducted through the interleaving of time segments from…
Modulation
In many telecommunications systems, it is necessary to represent an information-bearing signal…
Telecommunication
Telecommunication, science and practice of transmitting information by electromagnetic means. Modern telecommunication centres on…
Other methods of machining
Ultrasonic machining (USM) In USM, material is removed from a workpiece with…
Electrical-discharge machining (EDM)
EDM involves the direction of high-frequency electrical spark discharges from a graphite…


