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Mobile Telephony
Mobile telephony is the provision of wireless telephone services to mobile phones, distinguishing it from fixed-location telephony provided via landline phones. Traditionally, telephony specifically refers to voice communication, though the distinction has become less clear with the integration of additional features such as text messaging and data services. Modern mobile phones connect to a terrestrial cellular network of base stations (commonly referred to as cell sites), using radio waves to facilitate communication. Satellite phones use wireless links to orbiting satellites, providing an alternative in areas lacking local terrestrial communication infrastructure, such as landline and cellular networks. Cellular networks, satellite networks, and landline systems are all linked to the public switched telephone network (PSTN), enabling calls to be made to and from nearly any telephone worldwide. As of 2010, global estimates indicated approximately five billion mobile ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telstra Mobile Phone Tower
Telstra Group Limited is an Australian telecommunications company that builds and operates telecommunications networks and markets related products and services. It is a member of the S&P/ASX 20 stock index, and is Australia's largest telecommunications company by market share. Telstra has a long history in Australia, originating together with Australia Post as the Postmaster-General's Department upon Federation of Australia, federation in 1901. Telstra had transitioned from a state-owned enterprise to a fully Privatization, privatised company by 2006. History Australia's telecommunications services were originally controlled by the Postmaster-General's Department (PMG), formed in 1901 as a result of Australian Federation. Prior to 1901, telecommunications were administered by each colony. On 1 July 1975, separate commissions were established by statute to replace the PMG. Responsibility for postal services was transferred to the Australian Postal Commission (Australia Pos ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of National Inventors Hall Of Fame Inductees
The National Inventors Hall of Fame (NIHF) is an American not-for-profit organization, founded in 1973, which recognizes individual engineers and inventors who hold a U.S. patent of significant technology Technology is the application of Conceptual model, conceptual knowledge to achieve practical goals, especially in a reproducible way. The word ''technology'' can also mean the products resulting from such efforts, including both tangible too .... The inventor list constitutes historic persons from the past three centuries in addition to living inductees. Nominees must hold a U.S. patent of significant contribution to the U.S. welfare, and which advances science and useful arts. John Fitch (anno 1743) was the earliest born inventor inducted into the NIHF. Inductees References External links The official website of the National Inventors Hall of Fame {{DEFAULTSORT:National Inventors Hall of Fame inductees Awards established in 1973 Lists of inventors ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MTD (mobile Network)
MTD ( Swedish abbreviation for ''Mobiltelefonisystem D'', or ''Mobile telephony system D'') was a manual mobile phone system for the 450 MHz frequency band. It was introduced in 1971 in Sweden, and lasted until 1987, when it was made obsolete by the NMT automatic service. The MTD network had 20,000 users at its peak, with 700 people employed as phone operators. MTD was also implemented in Denmark Denmark is a Nordic countries, Nordic country in Northern Europe. It is the metropole and most populous constituent of the Kingdom of Denmark,, . also known as the Danish Realm, a constitutionally unitary state that includes the Autonomous a ... and in Norway (from 1976), which allowed roaming within the Scandinavia, Scandinavian countries. MTA In Sweden, the first mobile phone system was MTA (for ''Mobiltelefonisystem A''), which was introduced in 1956, and lasted until 1967. It was a 160 MHz system available in Stockholm and Gothenburg, with 125 total subscribers. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bell Labs
Nokia Bell Labs, commonly referred to as ''Bell Labs'', is an American industrial research and development company owned by Finnish technology company Nokia. With headquarters located in Murray Hill, New Jersey, Murray Hill, New Jersey, the company operates several laboratories in the United States and around the world. As a former subsidiary of the American Telephone and Telegraph Company (AT&T), Bell Labs and its researchers have been credited with the development of radio astronomy, the transistor, the laser, the photovoltaic cell, the charge-coupled device (CCD), information theory, the Unix operating system, and the programming languages B (programming language), B, C (programming language), C, C++, S (programming language), S, SNOBOL, AWK, AMPL, and others, throughout the 20th century. Eleven Nobel Prizes and five Turing Awards have been awarded for work completed at Bell Laboratories. Bell Labs had its origin in the complex corporate organization of the Bell System telepho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Total Access Communication System
Total Access Communication System (TACS) and ETACS are variants of Advanced Mobile Phone System (AMPS) which were announced as the choice for the first two UK national cellular systems in February 1983, less than a year after the UK government announced the T&Cs for the two competing mobile phone networks in June 1982. This 1G technology is now obsolete. History Vodafone (known then as Racal-Vodafone) opted for a £30 million turnkey contract from Ericsson (ERA) to design, build and set up its initial network of 100 base station sites. Cellnet (then known Telecom Securicor Cellular Radio Ltd) used development labs in the facilities at General Electric (later made part of Motorola) based at Lynchburg, Virginia, United States. The reason Cellnet used the General Electric labs was because the AMPS system was already in development there, and the company had set up a production facility in readiness for AMPS production in 1985 which the Cellnet TACS was to share. In March 1984 de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Advanced Mobile Phone Service
Advanced Mobile Phone Service, Inc. was a subsidiary of AT&T prior to the Bell System Divestiture. Abbreviated AMPS, the company was created in 1978 to build and operate the new Advanced Mobile Phone System, also abbreviated AMPS. AMPS was developed by Bell Labs to replace older, severely limited radiophone services, such as IMTS. AMPS was one of first providers of cellular phone service, starting in Chicago on October 13, 1983, and in the Washington, D.C., area December 1983. After divestiture, AMPS was divided among the 7 newly created Regional Holding Companies, now known as RBOCs: * NYNEX Mobile Communications * Bell Atlantic Mobile Systems * Ameritech Mobile Communications * BellSouth Mobility * PacTel Mobile Access * Southwestern Bell Mobile Systems * U S West NewVector Evolution of Successor Companies Through a series of mergers, acquisitions, and re-consolidation among the Baby Bells, these 7 original mobile operating companies are now split as such - * AT&T Mobilit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vodafone UK
Vodafone Limited, trading as Vodafone UK (stylised as vodafone), is a British telecommunications company, owned since May 2025 by VodafoneThree, a joint venture between Vodafone Group (51%) and Three owner CK Hutchison Holdings (49%). The country's first cellular phone call was made on the Vodafone network in 1985, and the world's first SMS text message in 1992. Vodafone is the third-largest mobile network operator in the United Kingdom, with 18.3 million subscribers as of February 2025, followed by O2, EE and its network partner Three. In June 2023, it was announced that subject to regulatory approval Vodafone UK and Three UK will merge to create Britain's biggest mobile network. The merger was approved by the Competition and Markets Authority in December 2024, and completed in May 2025, with the company becoming part of VodafoneThree. Within six months of the merger, customers are expected to receive access to a shared Vodafone-Three network. History Mobile netw ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Barclays
Barclays PLC (, occasionally ) is a British multinational universal bank, headquartered in London, England. Barclays operates as two divisions, Barclays UK and Barclays International, supported by a service company, Barclays Execution Services. Barclays traces its origins to the goldsmith banking business established in the City of London in 1690. James Barclay became a partner in the business in 1736. In 1896, twelve banks in London and the English provinces, including Goslings Bank, Backhouse's Bank and Gurney, Peckover and Company, united as a joint-stock bank under the name Barclays and Co. Over the following decades, Barclays expanded to become a nationwide bank. In 1967, Barclays deployed the world's first cash dispenser. Barclays has made numerous corporate acquisitions, including of London, Provincial and South Western Bank in 1918, British Linen Bank in 1919, Mercantile Credit in 1975, the Woolwich in 2000 and the North American operations of Lehman Brothers i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Millicom
Millicom International Cellular SA is a Luxembourgish fixed line and mobile telecommunications services provider operating in Latin America operating under the Tigo brand. Its main shareholder is Xavier Niel, a French billionaire who owns 40% of the company. Millicom operating subsidiaries and joint ventures employed more than 21,000 people and provided mobile services to approximately 55 million customers, with a cable footprint of more than 12 million homes passed. History Millicom International Cellular SA was established on December 14, 1990, by Shelby Bryan, Jan Stenbeck, Telma Sosa, and Olvin Galdamez, combining the cellular telephone properties owned by Industriförvaltnings AB Kinnevik and Millicom Incorporated. Millicom is headquartered in Luxembourg with a United States corporate office in Miami. Through the Tigo and Tigo Business brands, Millicom provides digital services, including high-speed data, broadband, mobile, cable TV, voice and SMS, Mobile Financial Se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
O2 (UK)
Telefonica UK Limited, trading as O2 UK (stylised as O2), is a British List of telephone operating companies#United Kingdom, telecommunications services provider. It is the List of mobile network operators of Europe#United Kingdom, largest mobile network in the United Kingdom, with approximately 23.2million subscribers . The network was launched in 1985 as Cellnet, a joint venture between BT Group, British Telecom (60%) and Securicor (40%), and later rebranded BT Cellnet following BT's acquisition of Securicor's share. Cellnet was one of the two original cellular network operators in the UK, alongside Vodafone UK, Vodafone. In 2001, BT spun off its BT Wireless division as mmO2 plc (later O2 plc), with the UK network adopting the O2 (brand), O2 brand in 2002. O2 plc was acquired by Spanish telecommunications firm Telefónica in 2006. Since 2021, O2 UK has formed a subsidiary of Virgin Media O2, a 50:50 joint venture between Telefónica and Liberty Global formed through the merge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
