Communications progress -- from a single strand of telegraph wire to today's complex array of wireless, wired and fibre transmissions, switches and routers.

Updated November 30 2016 - 5:48pm, first published 5:21pm

In 1858 the first inter-colony telegraph links were built when Adelaide, Melbourne and Sydney were linked together with Brisbane being connected three years later. To emphasise the simplicity of the early networks, the Overland Telegraph Line was made from a single strand of iron wire. That is a far cry from a modern network that goes via a complicated array of wireless; wired and fibre transmissions and is automatically routed at a number of points via a variety of switches and routers.

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