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SACS (cable System)
The South Atlantic Cable System or SACS (), is a submarine communications cable in the South Atlantic Ocean linking Luanda, Angola with Fortaleza, Brazil Brazil, officially the Federative Republic of Brazil, is the largest country in South America. It is the world's List of countries and dependencies by area, fifth-largest country by area and the List of countries and dependencies by population ... with a leg connecting the Brazilian archipelago of Fernando de Noronha as well. It is the first low Latency (engineering), latency routing between Africa and South America. The undersea cable measures 6,165 km in length and has been designed with 100 Gbps coherent Wavelength-division multiplexing, WDM technology - with 4 fiber pairs and offers a total capacity of 40 Tbit/s between Brazil and Angola. In September 2018 Angola Cables announced that the SACS cable was on-line and ready to begin commercial operation. It was also reported at this point that it was NEC wh ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Latency (engineering)
Latency, from a general point of view, is a time delay between the Causality, cause and the effect of some physical change in the system being observed. Lag (video games), Lag, as it is known in Gaming culture, gaming circles, refers to the latency between the input to a simulation and the visual or auditory response, often occurring because of network delay in online games. The original meaning of “latency”, as used widely in psychology, medicine and most other disciplines, derives from “latent”, a word of Latin origin meaning “hidden”. Its different and relatively recent meaning (this topic) of “lateness” or “delay” appears to derive from its superficial similarity to the word “late”, from the old English “laet”. Latency is physically a consequence of the limited velocity at which any Event (relativity), physical interaction can propagate. The magnitude of this velocity is always less than or equal to the speed of light. Therefore, every physical s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Internet In South America
Internet History of computing in South America South America South America is a continent entirely in the Western Hemisphere and mostly in the Southern Hemisphere, with a considerably smaller portion in the Northern Hemisphere. It can also be described as the southern Subregion#Americas, subregion o ... Internet Information technology in South America ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Internet In Africa
The Internet in Africa is limited by a lower penetration rate when compared to the rest of the world. Measurable parameters such as the number of Internet Service Providers, ISP subscriptions, overall number of host (network), hosts, Internet Exchange Point, IXP-traffic, and overall available bandwidth (computing), bandwidth are indicators that Africa is far behind the "digital divide". Moreover, Africa itself exhibits an inner digital divide, with most Internet activity and infrastructure concentrated in South Africa, Morocco, and Egypt, as well as smaller economies like Mauritius and the Seychelles. In general, only 43% of the African population has access to the Internet as of 2021. Only 0.4% of the African population has a fixed-broadband subscription. The majority of internet users use it through mobile broadband. During the COVID-19 pandemic, many people who were not connected to the internet lost access to health care and education. Production in all industries was serious ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Submarine Communications Cables In The South Atlantic Ocean
A submarine (often shortened to sub) is a watercraft capable of independent operation underwater. (It differs from a submersible, which has more limited underwater capability.) The term "submarine" is also sometimes used historically or informally to refer to remotely operated vehicles and Autonomous underwater vehicle, robots, or to medium-sized or smaller vessels (such as the midget submarine and the wet sub). Submarines are referred to as ''boats'' rather than ''ships'' regardless of their size. Although experimental submarines had been built earlier, submarine design took off during the 19th century, and submarines were adopted by several navies. They were first used widely during World War I (1914–1918), and are now used in many navy, navies, large and small. Their military uses include: attacking enemy surface ships (merchant and military) or other submarines; aircraft carrier protection; Blockade runner, blockade running; Ballistic missile submarine, nuclear deterrenc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Transatlantic Communications Cables
Transatlantic, Trans-Atlantic or TransAtlantic may refer to: Film * Transatlantic Pictures, a film production company from 1948 to 1950 * Transatlantic Enterprises, an American production company in the late 1970s * ''Transatlantic'' (1931 film), an American comedy starring Edmund Lowe * ''Transatlantic'' (1960 film), a British film * ''Transatlantic'' (1998 film), a Croatian film by Mladen Juran Literature * '' Trans-Atlantyk'' a 1953 novel by Witold Gombrowicz * ''TransAtlantic'' (novel), a 2013 book by Colum McCann Music * Transatlantic Records, an independent record label active in the UK in the 1960s and 1970s * Transatlantic (band), a multinational progressive rock supergroup * The Transatlantics, an Australian funk and soul band * ''Transatlantic'' (opera), a 1928 opera by George Antheil * ''Transatlantic'' (Chris Potter album), 2011 Television * ''Transatlantic'' (TV series), a 2023 Netflix series. Transport * Transatlantic crossing, by sea ** Transatlantic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
WACS (cable System)
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 (including Cape Verde and Canary Islands) and 2 in Europe (Portugal and England) 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. History On 6 August 2023, the cable system snapped simultaneously with the SAT-3 Cable System after a rock fall in the Congo Canyon. Internet Speeds in Sub-Saharan Africa were impact ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SAex
SAex (South Atlantic Express) is a proposed submarine communications cable linking South Africa to the United States with branches to Namibia, Saint Helena, and Brazil. The project was announced in 2011 by eFive Telecoms (Pty) Ltd, who led the project during the early feasibility studies. In November 2013 South Atlantic Express Cable Company (Pty) Ltd took over responsibility and was renamed to SimplCom South Africa (Pty) Ltd after SimplCom Inc. (Canada) acquired a controlling shareholding in the former. In April, 2011 the Bank of China announced that it was interested in investing 60% of the funds required for the project while the Industrial Development Corporation of South Africa also had expressed interest in providing funding. In June 2011 the project was expected to cost R3 billion to complete. A revised configuration (cable branch to Namibia instead of Angola, additional branch to Saint Helena, and four instead of three fibre pairs), technological improvements and lower co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SAT-3/WASC
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. It forms part of the SAT-3/WASC/SAFE cable system, where the SAFE cable links South Africa to Asia. The SAT-3/WASC/SAFE system provides a path between Asia and Europe for telecommunications traffic that is an alternative to the cable routes that pass through the Middle East, such as SEA-ME-WE 3 and FLAG. SAT-3 has a capacity of 340 Gbit/s while SAFE has a capacity of 440 Gbit/s. The SAT-3 system together with SAFE was built by a consortium of operators . History SAT-3/WASC/SAFE began operations in 2001, providing the first links to Europe for West African internet users and, for South Africans, taking up service from SAT-2 which was reaching maximum capacity. SAT-2 had been brought into service in the early 1990s as a replacement for the original undersea cable SAT-1 whic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wavelength-division Multiplexing
In fiber-optic communications, wavelength-division multiplexing (WDM) is a technology which multiplexes a number of optical carrier signals onto a single optical fiber by using different wavelengths (i.e., colors) of laser light. This technique enables bidirectional communications over a single strand of fiber (also called wavelength-division duplexing) as well as multiplication of capacity. The term WDM is commonly applied to an optical carrier, which is typically described by its wavelength, whereas frequency-division multiplexing typically applies to a radio carrier, more often described by frequency. This is purely conventional because wavelength and frequency communicate the same information. Specifically, frequency (in Hertz, which is cycles per second) multiplied by wavelength (the physical length of one cycle) equals velocity of the carrier wave. In a vacuum, this is the speed of light (usually denoted by the lowercase letter, c). In glass fiber, velocity is substan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Luanda
Luanda ( ) is the Capital city, capital and List of cities and towns in Angola, largest city of Angola. It is Angola's primary port, and its major industrial, cultural and urban centre. Located on Angola's northern Atlantic coast, Luanda is Angola's administrative centre, its chief seaport, and also the capital of the Luanda Province. Luanda and its metropolitan area is the most populous Portuguese-speaking capital city in the world and the most populous Lusophone city outside Brazil. In 2020 the population reached more than 8.3 million inhabitants (a third of Angola's population). Among the oldest colonial cities of Africa, Luanda was founded in January 1576 as ''São Paulo da Assunção de Loanda'' by Portuguese explorer Paulo Dias de Novais, being occasionally called "Leonda" or "St Paul de Leonda" by non-Portuguese sources. The city served as the centre of the Slavery in Angola, slave trade to Brazil before the institution was prohibited. At the start of the Angolan Civil W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
