A.T.&T. in venture to lay cable to Japan

Article Abstract:

AT and T, which is the largest telephone company in the US, and Kokusai Denshin Denwa, Japan's largest telephone company, agree to link the two countries with an undersea cable capable of transmitting 600,000 simultaneous conversations. The capacity increase is significant: the first cable could carry only 48 conversations; and more recent cables could carry 40,000 conversations. The new cable will use fiber optic technology, employing an innovative optical amplifier that costs less than other repeaters and does not need to convert a signal to an electrical signal and back, as older amplifiers did. AT and T will not estimate the cost of the new cable, but the last significant cable laid across the Atlantic Ocean cost $360 million, or $9,000 for each of its 40,000 lines.

Planning, Telecommunications industry, Partnerships, Cooperative Agreements, Telecommunications Service, Partnership, Kokusai Denshin Denwa Company Ltd.

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New fiber-optic cable will expand calls abroad, and defy sharks

Article Abstract:

International telephone traffic is doubling every four years, and so to keep up with demand, telephone companies must to lay new trans-Atlantic telephone cables. AT and T plans to lay 20,000 miles of fiber-optic cable during the next few years. Fiber-optic cables can carry from 40,000 to 80,000 calls at a time. Telephone company representatives say the increase in call traffic is due largely to increased facsimile communications and computer communications. The cables must be specially wrapped in steel tape in order to protect them from shark bites and from damage relating to fishing activities.

Telephone companies, Telecommunications systems, Telecommunications equipment, Atlantic Ocean, Communications Equipment, Telephone Company, Optical Communication

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