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1959 - cable is used to transmit speech east-to-west, the other west-to-east

TRANSMIT EAST-TO-WEST WEST-TO EAST

CD 1967084 E&MP130.002

Telephone

September 22, 1959

Twin submarine cables (cutaway detail top) comprise new transatlantic telephone cable system linking North America and European mainland.

One cable is used to transmit speech east-to-west, the other west-to-east.

Specially constructed repeaters were built into each cable every 44 miles to amplify speech.

Without these repeaters, voices would not be carried across the cable which runs 2,500 miles across the Atlantic.

Vacuum tubes (lower photo) were used in the repeaters.

Cable system is joint undertaking of Long Lines Department of American Telephone and Telegraph Company and Federal communications agencies in France and Germany. 


Original Caption by Science Service
American Telephone and Telegraph Company



National Museum of American History

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