On This Day in Telephone History September 10TH 1929 Transoceanic radiotelephone service extended to a 24-hour basis. Transoceanic radiotelephone service had been operated from 6:30AM to 10PM EST The previous year. When it began on January 7TH 1927, service was from 8:30AM to 1PM EST.

On This Day in Telephone History September 10TH 1929

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On This Day in Telephone History September 10TH 1929 Transoceanic Radiotelephone Service extended to a 24-hour basis. Transoceanic radiotelephone service had been operated from 6:30AM to 10PM EST The previous year. When it began on January 7TH 1927, service was from 8:30AM to 1PM EST.