NorSea Com 1 (cable system)
Encyclopedia
NorSea Com-1 is a submarine telecommunications cable system
Submarine communications cable
A submarine communications cable is a cable laid on the sea bed between land-based stations to carry telecommunication signals across stretches of ocean....

 in the North Sea
North Sea
In the southwest, beyond the Straits of Dover, the North Sea becomes the English Channel connecting to the Atlantic Ocean. In the east, it connects to the Baltic Sea via the Skagerrak and Kattegat, narrow straits that separate Denmark from Norway and Sweden respectively...

 linking the UK and Norway
Norway
Norway , officially the Kingdom of Norway, is a Nordic unitary constitutional monarchy whose territory comprises the western portion of the Scandinavian Peninsula, Jan Mayen, and the Arctic archipelago of Svalbard and Bouvet Island. Norway has a total area of and a population of about 4.9 million...

, and connecting five off-shore platforms
Oil platform
An oil platform, also referred to as an offshore platform or, somewhat incorrectly, oil rig, is a lаrge structure with facilities to drill wells, to extract and process oil and natural gas, and to temporarily store product until it can be brought to shore for refining and marketing...

.

It has landing points
Cable landing point
A cable landing point is the location where a submarine or other underwater cable makes landfall. The term is most often used for the landfall points of submarine telecommunications cables and submarine power cables. The landing will either be direct or via a branch from a main cable using a...

 in:
  1. Lowestoft
    Lowestoft
    Lowestoft is a town in the English county of Suffolk. The town is on the North Sea coast and is the most easterly point of the United Kingdom. It is north-east of London, north-east of Ipswich and south-east of Norwich...

    , Suffolk
    Suffolk
    Suffolk is a non-metropolitan county of historic origin in East Anglia, England. It has borders with Norfolk to the north, Cambridgeshire to the west and Essex to the south. The North Sea lies to the east...

    , UK
  2. Kårstø
    Kårstø
    Kårstø is an industrial facility located in Tysvær, Norway. The site features a number of natural gas processing plants to refine natural gas and condensate from the fields in the northern parts of the North Sea, including Åsgard, Mikkel and Sleipner...

    , Rogaland
    Rogaland
    is a county in Western Norway, bordering Hordaland, Telemark, Aust-Agder and Vest-Agder. It is the center of the Norwegian petroleum industry, and as a result of this, Rogaland has the lowest unemployment rate of any county in Norway, 1.1%...

    , Norway


And connecting the following platforms:
  1. Draupner platform
    Draupner platform
    The Draupner platform is a complex consisting of the Draupner S and E riser platforms in the North Sea. It is located in the Norwegian North Sea block 16/11 offshore Norway. The complex consists of seven risers and two riser platforms standing in water depth and linked by a bridge...

    , operated by Gassco
    Gassco
    Gassco is a Norwegian state owned company that operates of natural gas pipes transporting annually of 88.5 billion cubic meter of natural gas from the Norwegian continental shelf to Continental Europe and the United Kingdom....

  2. Ula oil field
    Ula oil field
    Ula is an offshore oil field located in the southern Norwegian section of North Sea along with Gyda, Tambar and Tambar East fields making up the UGT area, usually attributed to DONG Energy's main areas of exploration and production activity. The Ula field was discovered in 1976 and came online in...

    , operated by BP
    BP
    BP p.l.c. is a global oil and gas company headquartered in London, United Kingdom. It is the third-largest energy company and fourth-largest company in the world measured by revenues and one of the six oil and gas "supermajors"...

  3. Ekofisk, operated by ConocoPhillips
    ConocoPhillips
    ConocoPhillips Company is an American multinational energy corporation with its headquarters located in the Energy Corridor district of Houston, Texas in the United States...

  4. Valhall oil field
    Valhall oil field
    Valhall is an oil field in the Norwegian sector of the North Sea. Discovered in 1975, production began in 1982 and is expected to continue until 2050. Valhall is located in 70 metres of water.- Development :...

    , operated by BP
    BP
    BP p.l.c. is a global oil and gas company headquartered in London, United Kingdom. It is the third-largest energy company and fourth-largest company in the world measured by revenues and one of the six oil and gas "supermajors"...

  5. Murdoch gas field, operated by ConocoPhillips
    ConocoPhillips
    ConocoPhillips Company is an American multinational energy corporation with its headquarters located in the Energy Corridor district of Houston, Texas in the United States...



The cable system is owned by North Sea Communications AS, a fully owned subsidiary of TeliaSonera
TeliaSonera
TeliaSonera AB is the dominant telephone company and mobile network operator in Sweden and Finland. The company has operations in other countries in Northern, Eastern Europe, Central Asia and Spain, with a total of 150 million mobile customers...

.

Originally, NorSea Com was owned 50% by Telia and 50% by Enitel. After Enitel's bankruptcy
Bankruptcy
Bankruptcy is a legal status of an insolvent person or an organisation, that is, one that cannot repay the debts owed to creditors. In most jurisdictions bankruptcy is imposed by a court order, often initiated by the debtor....

 in September 2001, Telia acquired the whole cable.

Installation started in 1998 and the cable was ready for service in 1999 with an initial capacity of a STM-16
STM-1
The STM-1 is the SDH ITU-T fiber optic network transmission standard. It has a bit rate of 155.52 Mbit/s. Higher levels go up by a factor of 4 at a time: the other currently supported levels are STM-4, STM-16, STM-64 and STM-256...

 system of 2.5 Gbit/s. Later, Enitel added a 16x10 Gbit/s wavelength-division multiplexing
Wavelength-division multiplexing
In fiber-optic communications, wavelength-division multiplexing is a technology which multiplexes a number of optical carrier signals onto a single optical fiber by using different wavelengths of laser light...

 system. The cable contains 24 optical fibers
Optical fiber
An optical fiber is a flexible, transparent fiber made of a pure glass not much wider than a human hair. It functions as a waveguide, or "light pipe", to transmit light between the two ends of the fiber. The field of applied science and engineering concerned with the design and application of...

.

NorSea Com-1 has a cable length of about 750 km between Draupner and Lowestoft. Between Draupner and Kårstø (ca 200 km) the system uses fiber in Statoil's submarine cable.
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