*Information is generated by a source. It is converted into an electronic signal by coding into machine readable from. The output is known as a signal.

*The siganl is applied to a medium. Medium carried this via electromagnetic waves and delivers it ti the receiver.

*Receiver accepts the signal or info

*Terminology Reference

Transmission Types

*Analogy(telephone Network)

DTE-DCE-POTS
DCE-DCE

*Digital
DTE

Analog-continous fluctuations over time between high and low lengths.

Digital-Discrete states(voltages,levels

Binary-if limited to two

Frequency- the number of timesper second a continous wave completes one cycle

Amplitude-the difference of the extremes from the midpoint in a cycle

Phase-the angular position of a wave