Titlebook: Data Communications; An Introduction to C Robert Techo Book 1980 Springer Science+Business Media New York 1980 Area.addition.administration

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Optimising Dynamic Normative SystemsIn this chapter the technique of multiplexing communications channels is described. This process involves the carrying, by one communication channel, of a number of smaller-capacity communication channels. The two principal methods of accomplishing this are . (FDM) and . (TDM).

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Originating Signals,Before getting into the actual data communications concepts, a few remarks of an introductory and elementary nature are in order. Fundamental to this discussion is the nature of the flow of electricity. We can think of it as the movement of electrons in a conductor such as copper wire.

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Multiplexing and Transmission Media,In this chapter the technique of multiplexing communications channels is described. This process involves the carrying, by one communication channel, of a number of smaller-capacity communication channels. The two principal methods of accomplishing this are . (FDM) and . (TDM).

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General Observations and Conclusionsn Figure 5.1. Analog signals have continuously varying amplitudes while digital signals consist of discrete pulses. These signals, whether digital or analog, are called baseband signals. In Chapter 3 it was shown that baseband signals cannot be transmitted for any appreciable distance over a communi