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Here is an interesting video talking about the origin of modern telephone communication.
In short first was the telegraph, then came the morse code. Then a way was found by bell to transmit voice on a short distances. Then Edisson's advancements make possible the telephone to exist to a primordial wall stick form of a modern telephone.
Its interesting to see the many woman which were used as a phone call operators in the rise of telephone. Then a little by little the phone operators were substituted by technology. Up to the point that now it is only computers that makes the phone communication reality.
Finally after a few stages of developments came the raise of modern telephone as we know it. And a little bit later the mobile phone. Nowdays we've become totally dependent on phones and often this little communicator devices we have to carry all around makes our life bitter and unrelaxed.
Secret Life Of Machines – The Telephone (Short History of the Telephone) [ Full Length ]
Well hope you enjoy the short documentary ! 🙂