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Unity is a Trans-Pacific
submarine communications cable A submarine communications cable is a cable laid on the seabed between land-based stations to carry telecommunication signals across stretches of ocean and sea. The first submarine communications cables were laid beginning in the 1850s and car ...
between
Japan Japan is an island country in East Asia. Located in the Pacific Ocean off the northeast coast of the Asia, Asian mainland, it is bordered on the west by the Sea of Japan and extends from the Sea of Okhotsk in the north to the East China Sea ...
and the
United States The United States of America (USA), also known as the United States (U.S.) or America, is a country primarily located in North America. It is a federal republic of 50 U.S. state, states and a federal capital district, Washington, D.C. The 48 ...
that was completed in April 2010. Unity comprises a 10,000 km linear cable system with a "multi-
terabit The bit is the most basic unit of information in computing and digital communication. The name is a portmanteau of binary digit. The bit represents a logical state with one of two possible values. These values are most commonly represented as ...
" capacity of up to 7.68 Tbit/s. Construction of the cable was funded by a consortium formed in February 2008 comprising
Bharti Airtel Bharti Airtel Limited is an Indian Multinational corporation, multinational Telecommunications in India, telecommunications company based in New Delhi. It operates in 18 countries across South Asia and Africa, as well as the Channel Islands. ...
, Global Transit,
Google Google LLC (, ) is an American multinational corporation and technology company focusing on online advertising, search engine technology, cloud computing, computer software, quantum computing, e-commerce, consumer electronics, and artificial ...
, KDDI Corporation, Pacnet and
SingTel Singapore Telecommunications Limited, trading as Singtel, is a Singaporean telecommunications conglomerate, the country's principal fixed-line operator and one of the four major mobile network operators operating in the country. Overview T ...
.Grahame Lynch
Google plans new undersea "Unity" cable across Pacific
." '' CommsDay.com.'' September 21, 2007. Retrieved on September 21, 2007.
Unity's installation cost around US$300 million, and its completion increased Trans-Pacific cable capacity by around 20 per cent.


History

In February 2008 a consortium comprising Bharti Airtel, Global Transit, Google, KDDI Corporation, Pacnet and SingTel announced that they had executed agreements to build a high-bandwidth subsea fiber optic cable linking the United States and Japan, with an estimated construction cost of US$300 million. A signing ceremony was held in Tokyo on February 23, 2008 at which the Unity consortium contracted
NEC Corporation is a Japanese multinational information technology and electronics corporation, headquartered at the NEC Supertower in Minato, Tokyo, Japan. It provides IT and network solutions, including cloud computing, artificial intelligence (AI), Inter ...
and Tyco Telecommunications to construct and install the system. NEC and Tyco began work on the project in June 2008. The cable reached Japan in November 2009. Testing of the cable was completed, and it became ready for service, in April 2010.


Specifications

Unity is a 10,000 kilometer Trans-Pacific cable between Chikura, located off the coast near Tokyo, and Los Angeles and other network points of presence on the West Coast of the United States. At Chikura, Unity is connected to other cable systems. The new five fiber pair cable system has five fiber pairs, with each fiber pair capable of carrying up to 960 gigabits per second (Gbit/s). By having a high fiber count, Unity is able to offer more capacity at lower unit costs. Unity is expected to initially increase Trans-Pacific lit cable capacity by about 20 percent, with the potential to add up to 7.68 terabits per second (Tbit/s) of bandwidth across the Pacific.


Media response

Writing in ''The New York Times'' in September 2007, Saul Hansell said of Google's anticipated involvement in Unity that: "Google may be the ultimate do-it-yourself company. From the start, Google's sense of its own engineering superiority, combined with a tightwad sensibility, led it to build its own servers. It writes its own operating systems. It is now threatening to buy wireless carrier spectrum and it is getting ready to hire ships that will lay a data communications cable across the Pacific..."


See also

*
List of international submarine communications cables This is a list of international submarine communications cables. It does not include domestic cable systems, such as those on the coastlines of Japan, Italy, and Brazil. All the cable systems listed below have landing points in two or more countr ...
*
FASTER (cable system) FASTER is a trans-Pacific submarine communications cable that went live during the last week of June 2016. The cable has a total length of approximately 11,629 km and a capacity of 60 Tb/s. The companies involved in the project include: * G ...


References


External links

* http://www.submarinecablemap.com/#/submarine-cable/unityeac-pacific {{KDDI KDDI Google Submarine communications cables in the Pacific Ocean Japan–United States relations 2010 establishments in California 2010 establishments in Japan