On This Day in Telephone History August 19TH 1955 AT&T Pressurized Nantucket Island. Entire Bell System telephone lines on Nantucket pressurized with dry nitrogen gas, a 20th century innovation, to prevent cable failure caused by water thereby lowering maintenance costs.

On This Day in Telephone History August 19TH 1955

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On This Day in Telephone History August 19TH 1955 AT&T Pressurized Nantucket Island. Entire Bell System telephone lines on Nantucket pressurized with dry nitrogen gas, a 20th century innovation, to prevent cable failure caused by water thereby lowering maintenance costs.

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