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Women who worked at manual telephone exchanges became known as "hello girls."
Communication

Telephone exchange

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An Overview Of Telecommunications System
Communication

Telecommunication

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Women who worked at manual telephone exchanges became known as "hello girls."
Communication

Telephone exchange

RooSho - 2
A telephone exchange, telephone switch, or central office is the telecommunications system in the PSTN or in big business. It interconnects digital system telephone...
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