Behind the scenes in the city's telephone system.--A section of the main city exchange at the G.P.O., showing the manually operated, switchboards. And the modern way.--A view of the apparatus in the automatic exchange. Two floors are packed closely with a mass of mechanism enclosed in glass through which an observer may see, but not hear, the complex automatic system doing its ... [ILLUSTRATED]
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The Daily Telegraph (Sydney, NSW : 1883 - 1930), Tue 9 Dec 1924, Page 18
It's easy and takes two shakes of a lamb's tail!
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