Explain the differences between data, voice, and video signals in 200 to 300 words. Include a description comparing the differences between a private branch exchange (PBX) and Voice over Internet protocol (VoIP).
The term signal basically specifies the various signal either it is data signals or the voice signals or the video signals. Besides all this signals there are also a lot of signals like radio waves, light signals, sound wave and many more. The process of conversion of the signal to the data is termed as modulation. Based on the form of signals, they are of two types- the analog as well as the dig