On This Day In Telephone History January 11TH 1952 – AT&T announced trial of aluminum conductor cable when the National Production Authority granted requests to free aluminum for this purpose. Copper was on short allowance because of military needs. The copper shortage cleared up during the year.

On This Day In Telephone History January 11TH 1952

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On This Day In Telephone History January 11TH 1952 – AT&T announced trial of Aluminum Conductor Cable when the National Production Authority granted requests to free aluminum for this purpose. Copper was on short allowance because of military needs. The copper shortage cleared up during the year.