System . One of the biggest technological breakthroughs was the prologue of automatic , electromechanical switching . As it was automatic , it was faster and more efficient than manual switching , and it transformed the telephone business from an extremely labor-intensive to a highly capital-intensive one . One of the consequences was drastic cuts of telephone operators . Electromechanical switching progressively gave way to fully electronic switching in the sixties and seventies , and these ultimately to the computerized switching systems of today with their highly automated...











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