The first commercial transatlantic telephone service is established between New York and London. on January 7, 1927. The serviced used radio waves for communication, not cables. It opened real-time voice communication across the Atlantic although it was subject to atmospheric interference and was also very expensive to use. (around $6 per minute (equivalent to hundreds today)
The inaugural call was between AT&T President Walter S. Gifford in New York and Sir Evelyn P. Murray of Britain's General Post Office. The first permanent undersea cable (TAT-1) in 1956, significantly improved service quality.
