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TAT-14
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 (38,486,016 kbit/s as payload). The fibres were bundled into submarine cables connecting the United States and the European Union (United Kingdom, France, the Netherlands, Germany, and Denmark) in a ring topology. By the time this cable went into o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sprint Corporation
Sprint Corporation was an American telecommunications company. Before it Merger of Sprint Corporation and T-Mobile US, merged with T-Mobile US on April 1, 2020, it was the fourth-largest mobile network operator in the United States, serving 54.3 million customers as of June 30, 2019. The company also offered wireless voice, messaging, and broadband services through its various subsidiaries under the Boost Mobile (United States), Boost Mobile and Open Mobile brands and wholesale access to its wireless networks to mobile virtual network operators. In July 2013, a majority of the company was purchased by the Japanese telecommunications company SoftBank Group. Sprint used CDMA2000, CDMA, Evolution-Data Optimized, EvDO and LTE (telecommunication), 4G LTE networks, and formerly operated iDEN, WiMAX, and 5G NR networks. Sprint was incorporated in Kansas. Sprint traced its origins to the Brown Telephone Company, which was founded in 1899 to bring telephone service to the rural area arou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
BT Group
BT Group plc (trading as BT and formerly British Telecom) is a British multinational telecommunications holding company headquartered in London, England. It has operations in around 180 countries and is the largest provider of fixed-line, broadband and mobile services in the UK, and also provides subscription television and IT services. BT's origins date back to the founding in 1846 of the Electric Telegraph Company, the world's first public telegraph company, which developed a nationwide communications network. BT Group as it came to be started in 1912, when the General Post Office, a government department, took over the system of the National Telephone Company becoming the monopoly telecoms supplier in the United Kingdom. The Post Office Act of 1969 led to the GPO becoming a public corporation. The ''British Telecom'' brand was introduced in 1980, and became independent of the Post Office in 1981, officially trading under the name. British Telecommunications was privatised ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Belgacom ICS
BICS is a global leader in digital communications, cloud communication services, mobility and IoT, and addresses business-critical needs of telecom players, Virtual Network Operators, service providers, enterprise software providers and global enterprises. It is a subsidiary of Proximus Group. The company was founded in 1997 and is headquartered in Brussels, Belgium with sales offices and Service Operation Centers worldwide, including Dubai, Singapore, Bern, San Francisco and New York. BICS provides services across more than 200 countries, carries around 50% of the world's data roaming traffic, enables the global mobility of 150+ million devices and partners with more than 500 mobile operators. In 2021 BICS carried over 20.8 billion minutes of international traffic and generated revenues for 999 million Euros. History * 1997, Belgacom created its International carrier Services business unit. Later, in the early years 2000, the Belgacom Group deliberately separated the f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telesur (Suriname)
The Telecommunications Company Suriname (Telesur) is the government-owned full telecommunications service provider for Suriname. The services provided by Telesur include telephone, internet and wireless CDMA, GSM, HSDPA, UMTS, HSPA+ and LTE (telecommunication), LTE. Telesur is currently running a 900/1800 Mhz GSM, a 2100 MHz HSDPA, and a 450Mhz CDMA EVDO network. Telesur manages and operates the .sr country code top-level domain. History Telesur was founded on May 1, 1945, under the name ''’s Lands Telegraaf Telefoondienst'' (“National Telegraph Telephone Service”), LTT, and was formed from the merger of the ''’s Lands Radiodienst'' (“National Radio Service”), (established in 1925) and the ’s Lands Telefoonwezen, (“National Telephone Entity”), (founded in 1907). Twenty-eight years later, the company's name was changed to ’s Lands Telegraaf Telefoonbedrijf (National Telegraph and Telephone Company). In 1981 the name was officially changed to Telesur. Twenty-s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
EDFA
An optical amplifier is a device that amplifies an optical signal directly, without the need to first convert it to an electrical signal. An optical amplifier may be thought of as a laser without an optical cavity, or one in which feedback from the cavity is suppressed. Optical amplifiers are important in optical communication and laser physics. They are used as optical repeaters in the long distance fiberoptic cables which carry much of the world's telecommunication links. There are several different physical mechanisms that can be used to amplify a light signal, which correspond to the major types of optical amplifiers. In doped fiber amplifiers and bulk lasers, stimulated emission in the amplifier's gain medium causes amplification of incoming light. In semiconductor optical amplifiers (SOAs), electron-hole recombination occurs. In Raman amplifiers, Raman scattering of incoming light with phonons in the lattice of the gain medium produces photons coherent with the inco ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rostelecom
Rostelecom is Russia’s largest provider of digital services for a wide variety of consumers, households, private businesses, government and municipal authorities, and other telecom providers. Rostelecom interconnects all local public operators’ networks into a single national network for long-distance service. In other words, if one makes a long-distance call or originates Internet contact to or from Russia, it is likely that Rostelecom is providing part of the service. The company's stock trades primarily on the Moscow Exchange. History Prior to 1990, responsibility for the provision of telecommunications services lie at the Ministry of Communications of the USSR. On June 26, 1990, the Ministry of Communications of the USSR established a state-owned joint-stock company Sovtelekom, which was given the rights to operate the telecommunications network of the USSR. On December 30, 1992, by order of the State Property Committee of Russia, a state-owned enterprise Rostelecom, whi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
CYTA
CYTA Ltd. (; short for "Cyprus Telecommunication Authority"; gr, Αρχή Τηλεπικοινωνιών Κύπρου (ΑΤΗΚ), ''Archí Tilelikoinonión Kýprou (ATIK)'' ) is a telecommunication provider in Cyprus. The Cyprus Telecommunications Authority (Cyta), a semi-governmental organisation incorporated by law, is the leading provider of Integrated Electronic Communications in Cyprus. Originally established as Cyprus Inland Telecommunications Authority (CITA) in 1955, it was renamed Cyta in 1961 after taking control of external communications from Cable and Wireless Ltd. It is the dominant provider of fixed line telecommunications, mobile telecommunications and Ιnternet access in Cyprus. History Cyta has provided mobile telephony service since 1988. It has provided Internet access since 1995 under the Cytanet brand and it now offers broadband services DSL Access. Branded as miVision then, Cyta entered in 2004 the digital and interactive television market. The service ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elisa (company)
(English trade name Elisa Corporation) is a Finnish telecommunications company founded in 1882. Its previous names were Helsingin Puhelin (until July 2000) and Elisa Communications Oyj (until 2003). Elisa is a telecommunications, ICT and online service company operating mainly in Finland and Estonia, but it also offers digital services for international operators and other companies. In Finland Elisa is the market leader in mobile and fixed network subscriptions. Elisa provides services for communication and entertainment, and tools for improving operating methods and productivity of organisations. It cooperates for example with Vodafone and Tele2. Elisa offers fixed and mobile subscriptions and broadband subscriptions under Elisa and Elisa Saunalahti brands but also cable-tv-subscriptions. Elisa's digital services are among others Elisa Saunalahti, Elisa Videra, Elisa Automate, Elisa Smart Factory and Elisa Kirja ebook service. Elisa Viihde is producing Finnish drama. Elisa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telefónica
Telefónica, S.A. () is a Spanish multinational telecommunications company headquartered in Madrid, Spain. It is one of the largest telephone operators and mobile network providers in the world. It provides fixed and mobile telephony, broadband, and subscription television, operating in Europe and the Americas. As well as the Telefónica brand, it also trades as Movistar, O2, and Vivo. The company is a component of the Euro Stoxx 50 stock market index. History * The company was created in Madrid in 1924 as Compañía Telefónica Nacional de España (CTNE) with ITT as one of its major shareholders. * In 1945, the state acquired by law a share of 79.6% of the company. This stake was diluted by a capital increase in 1967. * Until the liberalisation of the telecom market in 1997, Telefónica was the only telephone operator in Spain. It still holds a dominant position (over 75% in 2000). * Nowadays, Telefónica is present in more than 20 countries around Europe and America. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tata Communications
Tata Communications Limited (previously known as Videsh Sanchar Nigam Limited) is an Indian telecommunications company. It was previously a government- owned-telecommunications service provider and under the ownership of Department of Telecommunications, Ministry of Communications, and the Government of India. It was then sold to Tata Group when the Atal Bihari Vajpayee-Bharatiya Janta Party- National Democratic Alliance was in power; presently the company is part of the Tata Group. Tata's communications network spans more than of subsea fibre and more than of terrestrial fibre. The company has invested US$1.19 billion in its global subsea fibre network. It provides network services and software-defined network platforms, such as Ethernet, SD-WAN, content delivery networks (CDNs), the internet, Multiprotocol Label Switching (MPLS), and private lines. It has more than 400 points of presence (PoPs) with a data centre, Cloud (Private Cloud and Puiblic Cloud Management) and c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telus
Telus Communications Inc. (TCI) is the wholly owned principal subsidiary of Telus Corporation, a Canadian national telecommunications company that provides a wide range of telecommunications products and services including internet access, voice, entertainment, healthcare, video, and IPTV television. The company is based in the Vancouver, British Columbia, area; it was originally based in Edmonton, Alberta, before its merger with BC Tel in 1999. Telus' wireless division, Telus Mobility, offers UMTS, and LTE-based mobile phone networks. Telus is the incumbent local exchange carrier in British Columbia and Alberta. Telus' primary competitors include Shaw Communications (in the western provinces). It also competes in the mobile sector with Shaw Communications, Rogers Communications and Bell Canada. Telus is a member of the British Columbia Technology Industry Association. History Telus Corp was formed in 1990 by the government of Alberta as Telus Corp, a holding company ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tele2
Tele2 AB is a Swedish telecommunications operator headquartered in the Kista Science City, Stockholm, Sweden. It is a major telephone operator in Sweden, Russia, Estonia, Latvia and Lithuania. Tele2 also has a 25% share in T-Mobile Netherlands. As of 7 September 2021, Tele2 and Deutsche Telekom have opted to rid themselves of T-Mobile Netherlands in a sale for an enterprise value of €5.1 billion. Tele2 started as a telecommunications company in Sweden in 1993 by the company Investment AB Kinnevik. It previously operated in many other markets but the company has since divested its licences, sold to other operators or to management buy-outs in those markets. History In 1981, a mobile phone provider called ''Comvik'' started as an alternative mobile phone operator to Televerket (today known as Telia Company). The cable television provider ''Kabelvision AB'' started in 1986. Comvik changed its name to become Comviq when the company got a GSM license in 1988 and started operati ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
