Labels:text | font | screenshot | electric blue OCR: In 1956 the laying of the 2,250-mile twin cable system on the floor of the Atlantic Ocean was completed. The project was a cooperative undertaking by the American Telephone and Telegraph Company, the British Post Office, and the Canadian Overseas Telegraph Company. Among the many complex problems to be solved in the laying of the cable was the development of the cable itself. The diameter of the cable was 1.84 inches. Thirty six voices could be transmitted simultaneously over the copper center wire. A thin copper tape covered the return tapes to prevent underwater worms, called teredos, from boring into the cable.