demodulate the signal. It connect one computer to another through ordinary telephone lines.
Fax( Facsimile Telegraphy)
The electronic reproduction of a document at a distant place is called FAX
Radio Waves
The radio waves are the electromagnetic waves of frequency ranging from 500 kHz to about 1000 MHz. These \ V8VeS are used In the field of radio communication. With reference to the frequency range and wavelength range, the radio waves have been divided into various categories shown in table.
Frequency Range and Wavelength Range of Radio Waves
Propagation of Radio Waves
The three modes are discussed below: