Technological and Economic Changes Affecting Communications
In general—and mobile communications in particular—for the purposes at hand the focus is on mobility as the basic factor that...
Comunicación
Telephone Transmission
Telephone signals between subscriber sets and the urban exchange, and between urban and long-distance exchanges, are carried by aerial lines,...
Television
The information to be transmitted in a television system is represented by the differences in illumination (and eventually in color)...
Multiplex Telegraphy
Multiplex telegraphic systems are those that allow the simultaneous transmission of more than one message in the same direction. They...
Telegraphy
As its name indicates, it is a telecommunication system based on the transmission of telegraphic messages. It was noted earlier...
