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Overseas telephonic communication in its early days was mainly confined to services between London and Paris, the North of France, Brussels and Antwerp. The first telephone cable across the Channel was laid in 1891. During the early 1920s services were gradually extended to other European and Scandinavian countries. In 1927 a radio-telephone service was opened between Britain and the United States. The overseas services were developed rapidly during the late 1920s and early 1930s, and communications soon extended to Australia, Canada, South America, Spain, Italy, etc.