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Networks

02/24/2011 - 00:25 PM

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In Italy and elsewhere, the earliest telephone networks were carried on overhead cables. They attached to the outside of houses and ran on poles above the rooftops. Outside towns the networks consisted of overhead wires carried by wooden poles that ran along the roads.

In 1925, work began on Italy's most ambitious network, a 700 kilometre-long underground cable linking Turin, Milan and Italy's Lake District, commonly known as the Ponti Cable.

Networks were able to handle increasing volumes of traffic thanks to the invention and manufacture of new, more technologically advanced cabling. As technology improved, each pair carried not just one line – but two, three, ten, even dozens of different lines. And the system was upgraded from simple overhead and buried cables to coaxial cable.

When digital technology began to be rolled out in the late 1980s, a network that had previously only been used for voice calls suddenly started to carry data, pictures, movies and sound in addition to our voices.

 

The images contained in this photogallery are the property of Telecom Italia. Please contact the Telecom Italia Historical Archive calling the number + 39 0115729401 to be allowed to use these images.