AT&T buildings

architectural structure

skyscraper in Manhattan, USA

building in New York City, notable for having no windows

authorized telecommunications intercept point

thumb|upright=1.35|Routes under study in early 1956

skyscraper in Nashville, Tennessee

office skyscraper in Manhattan, New York

TAT-14 was the 14th consortium transatlantic telecommunications cable system. In operation from 2001 to 2020, it used wavelength division multiplexing. The cable system was built from multiple pairs of fibres—one fibre in each pair was used for data carried in one direction and the other in the opposite direction. Although optical fibre can be used in both directions simultaneously, for reliability it is better not to require splitting equipment at the end of the individual fibre to separate transmit and receive signals—hence a fibre pair is used. TAT-14 used four pairs of fibres—two pairs as

skyscraper in Los Angeles, California, United States

office skyscraper in Manhattan, New York

building in Indiana, United States

submarine communications cable system, connecting South-East Asia with the US mainland across the Pacific via Guam and Hawaii

commercial offices, Switching station in Los Angeles, California

skyscraper in Minnesota

TAT-8 was the 8th transatlantic communications cable and first transatlantic fiber-optic cable, carrying 280 Mbit/s (40,000 telephone circuits) between the United States, United Kingdom and France. It was constructed in 1988 by a consortium of companies led by AT&T Corporation, France Télécom, and British Telecom. AT&T Bell Laboratories developed the technologies used in the cable. The system was made possible by opto-electric-opto regenerators acting as repeaters with advantages over the electrical repeaters of former cables. They were less costly and could be at greater spacing with les

skyscraper in Midtown Atlanta, Georgia