TAT-12/13 is a ring cable system consisting of the 12th and 13th consortia
transatlantic telephone cable
A transatlantic telecommunications cable is a submarine communications cable connecting one side of the Atlantic Ocean to the other. In the 19th and early 20th centuries, each cable was a single wire. After mid-century, coaxial cable came into use ...
s, in operation from 1996, initially carrying 2 × 5 Gbit/s.
This was the first TAT cable to use a ring structure, involving two stretches of cable across the ocean floor, which explains why two numbers (12 and 13) were used. All later cables also use a ring structure, but only use one number (
TAT-14
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 fo ...
etc.). The cable connected between Long Island (at
Shirley, New York
Shirley is a hamlet (and census-designated place) in Suffolk County, New York, United States. At the 2010 census, the population of Shirley was 27,854. Shirley is the western terminus of Atlantic Crossing 1, a major submarine telecommunication ...
Porthcurno
Porthcurno ( kw, Porthkornow, Porthcornow, meaning ''"pinnacle cove"'', see below) is a small village covering a small valley and beach on the south coast of Cornwall, England in the United Kingdom. It is the main settlement in a civil and an ec ...
, UK;
Bude
Bude (; kw, Porthbud) is a seaside town in north east Cornwall, England, in the civil parish of Bude-Stratton and at the mouth of the River Neet (also known locally as the River Strat). It was sometimes formerly known as Bude Haven.''Corn ...
TE Connectivity
TE Connectivity is an American Swiss-domiciled technology company that designs and manufactures connectors and sensors for several industries, such as automotive, industrial equipment, data communication systems, aerospace, defense, medical, o ...
), STC Submarine Systems (acquired by
Alcatel-Lucent
Alcatel–Lucent S.A. () was a French–American global telecommunications equipment company, headquartered in Boulogne-Billancourt, France. It was formed in 2006 by the merger of France-based Alcatel and U.S.-based Lucent, the latter being a s ...
) and Alcatel Submarcom. Ring switching equipment was provided by the Toshiba Corporation in each of the four cable stations.
The cables in this system were the first on the trans-Atlantic route to make use of
erbium-doped fiber amplifier
An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from ...
s.
The TAT-12/13 consortia removed the cable from normal commercial service on 31 December 2008.