Telecommunications in Tanzania include radio, television, fixed and mobile telephones, and the Internet available in mainland Tanzania and the semiautonomous Zanzibar archipelago.
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 active and two as backup. Each fibre in each pair carried 16 wavelengths in one direction, and each wavelength carried up to an STM-256. The fibres were bundled into submarine cables connecting the United States and the European Union in a ring topology.
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 laid beginning in the 1850s carried telegraphy traffic, establishing the first instant telecommunications links between continents, such as the first transatlantic telegraph cable which became operational on 16 August 1858.
ATLANTIS-2 is a fiber optic transatlantic telecommunications cable connecting Argentina, Brazil, Senegal, Cape Verde, Spain's Canary Islands and Portugal. It is the first submarine cable to link South America and the African continent.
SAT-3/WASC or South Atlantic 3/West Africa Submarine Cable is a submarine communications cable linking Portugal and Spain to South Africa, with connections to several West African countries along the route.
The South Africa Far East cable is an optical fiber submarine communications cable linking Melkbosstrand, South Africa to Penang, Malaysia.
Fibre-optic Link Around the Globe (FLAG) is a 28,000-kilometre-long fibre optic mostly-submarine communications cable that connects the United Kingdom, Japan, India, and many places in between. The cable is operated by Global Cloud Xchange, a subsidiary of RCOM. The system runs from the eastern coast of North America to Japan. Its Europe–Asia segment was the fourth longest cable in the world in 2008.
Hibernia Networks, alternately known as Hibernia Atlantic, was a privately held, US-owned provider of telecommunication services. It operated global network routes on self-healing rings in North America, Europe and Asia including submarine communications cable systems in the North Atlantic Ocean which connected Canada, the United States, the Republic of Ireland, the United Kingdom and mainland Europe. Hibernia managed cable landing stations in Dublin, Republic of Ireland; Coleraine, Northern Ireland; Southport, England; Halifax, Canada; Lynn, Massachusetts, United States.
Alaska Communications is a telecommunications corporation headquartered in Anchorage, Alaska. It was the first telecommunications provider in the state of Alaska to maintain a third-generation wireless network and the only provider in Alaska that owned fully incorporated infrastructure for the major telecommunications platforms; wireless communications, Internet networking, and local and long-distance phone service. Alaska Communications wireline operations include advanced data networks and an underwater fiber optic system. The Alaska Communications wireless operations included a statewide 3G CDMA network, and coverage extended from the North Slope to Southeast Alaska.
South East Asia–Middle East–Western Europe 4 is an optical fibre submarine communications cable system that carries telecommunications between Singapore, Malaysia, Thailand, Bangladesh, India, Sri Lanka, Pakistan, United Arab Emirates, Saudi Arabia, Egypt, Italy, Tunisia, Algeria and France. It is intended to be a complement to, rather than a replacement for, the SEA-ME-WE 3 cable.
MedNautilus is a submarine telecommunications cable system linking countries bordering the Eastern/Central Mediterranean Sea. It is a successor of the LEV system linking Cyprus, Israel and Italy.
TGN Atlantic (TGN-A) previously VSNL Transatlantic and TGN Transatlantic, is a submarine telecommunications cable system transiting the Atlantic Ocean. The cable has been in operation since 2001.
Pangea is a submarine telecommunications cable system transiting the North Sea connecting UK with Denmark and Netherlands. By 2002 it was no longer in service. It consisted of two widely separated submarine segments - Pangea North and Pangea South.
I-ME-WE is a 13,000-kilometre (8,100 mi) submarine communications cable system between India and France. The design capacity is 3.84 Terabits per second. It has been operational since 2009 with Tripoli, Lebanon being connected in November 2011. Internet Service Providers and Network Operators hope to utilize the additional bandwidth to support high-bandwidth peer-to-peer IP-based broadband services such as multimedia streaming, broadband Internet and voice/video telephony.
Telecommunications in Angola include telephone, radio, television, and the Internet. The government controls all broadcast media with a nationwide reach.
The West Africa Cable System (WACS) is a submarine communications cable linking South Africa with the United Kingdom along the west coast of Africa that was constructed by Alcatel-Lucent. The cable consists of four fibre pairs and is 14,530 km in length, linking from Yzerfontein in the Western Cape of South Africa to London in the United Kingdom. It has 14 landing points, 12 along the western coast of Africa and 2 in Europe completed on land by a cable termination station in London. The total cost for the cable system is $650 million. WACS was originally known as the Africa West Coast Cable (AWCC) and was planned to branch to South America but this was dropped and the system eventually became the West African Cable System.
Africa Coast to Europe (ACE) is an optical-fiber submarine cable system serving 24 countries on the Europe, west coast and south Africa, managed by a consortium of 20 members.
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 60Tb/s.
Alaska United Fiber Optic Cable System is a submarine fiber optic cable owned by GCI that links Anchorage, several places in Southeast Alaska including Juneau, to Oregon and Washington State. Alaska United East (AU-East) is 3,751 kilometers long with landing points at Anchorage and Lena Point in Juneau, and at the shore of Puget Sound at Norma Beach near Picnic Point in Lynnwood, Washington; AU-West has landings at Seward and on the Pacific coast at Warrenton, Oregon. Both are OC-192 rated as of 2018. Additional overland segments (AU-North/NW) connect Anchorage to Fairbanks and Prudhoe Bay along the Alaska Pipeline corridor and Parks Highway.
