The group was responsible for 15,000 tonnes of copper cabling over the 960-kilometre of route between Sydney and Melbourne
The cabling meant a revolution for users of the telephone, but also took broadcasting to a new level.
Lead engineer Dick Corin said it was no easy feat.
"The period we went through in the southern highlands was the wettest winter in (I don't know how) many years," he said.
And technician Clyde Blood said there were some surprises along the way.
"I can remember a couple of times they had to pump out dead sheep from pits that were full of water," he said.
The cabling has now been superseded by fibre optics and mobile phone networks
But as Australia races to adopt new communications technologies, this pioneering project has assured its place in history.
For more, watch the full report above.
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