-
Signals were first sent along wires.Nowadays, over one billion people send messages by mobile phone using communication satellites -
Bell's first telephones had one combined mouthpiece and earpiece -
Soon afterwards , in 1879, Thomas edison made the lephone wiht a separate mouthpiece and earpiece -
In the 1880, all the telephones calls had to go throught an operator. The operator answered your call,took the number you want and plugged in your line to complete the electrical circuit and connect your call, it was impossible to make a private call! -
In 1896 the first dial phones were used and by the 1920s, 'cradle' telephones were popular in Europe and the USA -
The cradle thelephones were popular in Europe and in the USA. -
The mobile phone was invented at the bell telephone laboratories in the USA in 1979.The first mobiles could certainly not fit in your pocket! A system of radio stations links the moving telephone to a computer network that keeps track of the caller