Sending Signals (7.12) (03/06/2024)

A telecommunications system, such as a telephone system, involves a contiunous or signal being into a digital signal. Digital being a signal that is represented by numbers, usually 1s and 0s or . It then passes along the path to a , which changes it into useful information again.

The signals may be changes in voltage, intensity of light or changes in the strength or frequency of radio waves. They may be transmitted using wires, or radio waves