TAT-14

TAT-14

Infobox Submarine communications cable
cable_name = TAT-14
owners = Carriers consortium
technology = Fiber optics with EDFA repeaters
design_capacity = 640 Gbit/s
current_capacity = 640 Gbit/s
length = 15,428 km
topology = Self-healing ring
first_use_date = March 21, 2001
landing_points =

flagicon|Denmark Blaabjerg, Denmark
flagicon|Germany Norden, Germany
flagicon|Netherlands Katwijk, Netherlands
flagicon|France St-Valery-en-Caux, France
flagicon|UK Widemouth Bay, UK
flagicon|USA TuckertonManasquan, USA

TAT-14 is the 14th consortia transatlantic telephone cable system.In operation from 2001, it utilises wavelength division multiplexing. The cable system is built from multiple pairs of fibres - one fibre in each pair is used for data carried in one direction (say West to East) and the other in the opposite direction (East to West). 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 uses 4 pairs of fibres - two pairs as active and two as backup. Each fibre in each pair carries 16 wavelengths in one direction, and each wavelength carries an STM-64 (9,621,504 kbit/s as payload). The fibres are bundled into submarine cables connecting the USA and the United Kingdom, France, The Netherlands, Germany and Denmark in a ring topology.

By the time this cable went into operation, the expected "long boom" (term coined by Wired magazine) was already ending in the "dot-com death". The overinvestment in transcontinental optical fiber capacity led to a financial crisis in private cable operators like Global Crossing.

Cable Failure

In November 2003, TAT-14 suffered two breaks within weeks of each other. This resulted in disruption to Internet services in the United Kingdom.

External links

*http://www.tat-14.com

* [http://news.zdnet.co.uk/communications/networks/0,39020345,39118125,00.htm Cable Failure Hits UK Internet Traffic] - Article by ZDNet on the 2003 cable failure


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