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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 the first modern cellular phone systems, which remained in operation until 2008. Service started 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 companie ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Advanced Mobile Phone System
Advanced Mobile Phone System (AMPS) was an analog mobile phone system standard originally developed by Bell Labs and later modified in a cooperative effort between Bell Labs and Motorola. It was officially introduced in the Americas on October 13, 1983,Private Line and was deployed in many other countries too, including Israel in 1986, Australia in 1987, Singapore in 1988, and Pakistan in 1990. It was the primary analog mobile phone system in North America (and other locales) through the 1980s and into the 2000s. As of February 18, 2008, carriers in the United States were no longer required to support AMPS and companies ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cingular
AT&T Mobility LLC, also known as AT&T Wireless and marketed as simply AT&T, is an American telecommunications company. It is a wholly owned subsidiary of AT&T Inc. and provides wireless services in the United States. AT&T Mobility is the third-largest wireless carrier in the United States, with 101.6 million subscribers as of the end of Q1 2022. The company is headquartered in Brookhaven, Georgia. Originally known as Cingular Wireless (a joint venture between SBC Communications and BellSouth) from 2000 to 2007, the company acquired the old AT&T Wireless in 2004; SBC later acquired the original AT&T and adopted its name. Cingular became wholly owned by AT&T in December 2006 as a result of AT&T's acquisition of BellSouth. In January 2007, Cingular confirmed it would rebrand itself under the AT&T name. Although the legal corporate name change occurred immediately, for both regulatory and brand-awareness reasons both brands were used in the company's signage and advertisin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Defunct Mobile Phone Companies Of The United States
{{Disambiguation ...
Defunct (no longer in use or active) may refer to: * ''Defunct'' (video game), 2014 * Zombie process or defunct process, in Unix-like operating systems See also * * :Former entities * End-of-life product * Obsolescence Obsolescence is the state of being which occurs when an object, service, or practice is no longer maintained or required even though it may still be in good working order. It usually happens when something that is more efficient or less risky r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bell System
The Bell System was a system of telecommunication companies, led by the Bell Telephone Company and later by the American Telephone and Telegraph Company (AT&T), that dominated the telephone services industry in North America for over one hundred years from its creation in 1877 until its antitrust breakup in 1983. The system of companies was often colloquially called Ma Bell (as in "Mother Bell"), as it held a vertical monopoly over telecommunication products and services in most areas of the United States and Canada. At the time of the breakup of the Bell System in the early 1980s, it had assets of $150 billion (equivalent to $ billion in ) and employed over one million people. Ever since the 1910s, American antitrust regulators had been observing and accusing the Bell System of abusing its monopoly power, and had brought legal action multiple times over the decades, until in 1974 the Antitrust Division of the U.S. Department of Justice brought a lawsuit against Be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
SBC Communications
The history of AT&T dates back to the invention of the telephone. The Bell Telephone Company was established in 1877 by Alexander Graham Bell, who obtained the first US patent for the telephone, and his father-in-law, Gardiner Greene Hubbard. Bell and Hubbard also established AT&T Corporation, American Telephone and Telegraph Company in 1885, which acquired the Bell Telephone Company and became the primary telephone company in the United States. This company maintained an effective monopoly on local telephone service in the United States until anti-trust regulators agreed to allow AT&T to retain Western Electric and enter general trades computer manufacture and sales in return for its offer to Breakup of the Bell System, split the Bell System by divesting itself of ownership of the Bell Operating Companies in 1982. AT&T Corporation was eventually purchased by one of the Regional Bell Operating Companies, the former Southwestern Bell Company, in 2005, and the combined company became ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chicago, Illinois
(''City in a Garden''); I Will , image_map = , map_caption = Interactive Map of Chicago , coordinates = , coordinates_footnotes = , subdivision_type = Country , subdivision_name = United States , subdivision_type1 = State , subdivision_type2 = Counties , subdivision_name1 = Illinois , subdivision_name2 = Cook and DuPage , established_title = Settled , established_date = , established_title2 = Incorporated (city) , established_date2 = , founder = Jean Baptiste Point du Sable , government_type = Mayor–council , governing_body = Chicago City Council , leader_title = Mayor , leader_name = Lori Lightfoot ( D) , leader_title1 = City Clerk , leader_name1 = Anna Valencia ( D) , unit_pref = Imperial , area_footnotes = , area_tot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vodafone
Vodafone Group Public limited company, plc () is a British Multinational corporation, multinational Telephone company, telecommunications company. Its registered office and Headquarters, global headquarters are in Newbury, Berkshire, England. It predominantly operates Service (economics), services in Asia, Africa, Europe, and Oceania. , Vodafone owns and operates networks in 22 countries, with partner networks in 48 further countries. Its Vodafone Global Enterprise division provides telecommunications and IT services to corporate clients in 150 countries. Vodafone has a primary listing on the London Stock Exchange and is a constituent of the FTSE 100 Index. The company has a secondary listing on Nasdaq. Name The name Vodafone comes from ''VO''ice ''DA''ta ''FONE'' (the latter a sensational spelling of "telephone, phone"), chosen by the company to "reflect the provision of voice and data services over mobile phones". History The evolution of Vodafone started in 1981 with the es ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
U S WEST NewVector
U or u, is the twenty-first and sixth-to-last letter and fifth vowel letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ''u'' (pronounced ), plural ''ues''. History U derives from the Semitic waw, as does F, and later, Y, W, and V. Its oldest ancestor goes to Egyptian hieroglyphics, and is probably from a hieroglyph of a mace or fowl, representing the sound v.html"_;"title="Voiced_labiodental_fricative.html"_;"title="nowiki/>Voiced_labiodental_fricative">v">Voiced_labiodental_fricative.html"_;"title="nowiki/>Voiced_labiodental_fricative">vor_the_sound_[Voiced_labial–velar_approximant.html" ;"title="Voiced_labiodental_fricative">v.html" ;"title="Voiced_labiodental_fricative.html" ;"title="nowiki/>Voiced labiodental fricative">v">Voiced_labiodental_fricative.html" ;"title="nowiki/>Voiced labiodental fricative">vor the sound [Voiced labial–velar approximan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PacTel Mobile Access
Pacific Telesis Group was one of the seven Regional Bell Operating Companies, sometimes also referred to as "RBOCs" or "Baby Bells", created in 1983 in preparation of the breakup of AT&T as a holding company for Pacific Bell and Nevada Bell, Pacific Telesis International and several other non-regulated companies including PacTel Mobile Services and PacTel InfoSystems. It was acquired by SBC Communications in 1997. Pacific Telesis Group was headquartered in San Francisco and incorporated in Nevada. Nicknames Pacific Telesis is more commonly known as "PacTel." Prior to the January 1, 1984, breakup of the Bell System, the corporate name of its principal subsidiary Pacific Bell was The Pacific Telephone & Telegraph Company, which had also been referred to as "PacTel." After the corporate name change, Pacific Bell was commonly known as "PacBell." The red and white star trademarked logo was referred to by company employees as the "splat" or more formally as the "access symbol" afte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NYNEX Mobile Communications
NYNEX Corporation was an American telephone company that served five states of New England (Maine, Massachusetts, New Hampshire, Rhode Island and Vermont) as well as most of the state of New York from January 1, 1984 to August 14, 1997. History Formed on January 1, 1984 as the result of the breakup of the Bell System, NYNEX was a Regional Bell Operating Company which was made up of former subsidiaries of AT&T, these being New York Telephone and New England Telephone. The name NYNEX was an acronym for New York/New England EXchange. Bell Atlantic NYNEX merged with Bell Atlantic on August 14, 1997, in what was at the time the second-largest merger in corporate history in America. Although the surviving company was Bell Atlantic, the merged company moved from the headquarters of Bell Atlantic in Philadelphia to the headquarters of NYNEX in New York City. Bell Atlantic acquired GTE on June 30, 2000 to form Verizon Communications, the merger being first announced in April 2000. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bell Atlantic Mobile Systems
A bell is a directly struck idiophone percussion instrument. Most bells have the shape of a hollow cup that when struck vibrates in a single strong strike tone, with its sides forming an efficient resonator. The strike may be made by an internal "clapper" or "uvula", an external hammer, or—in small bells—by a small loose sphere enclosed within the body of the bell (jingle bell). Bells are usually cast from bell metal (a type of bronze) for its resonant properties, but can also be made from other hard materials. This depends on the function. Some small bells such as ornamental bells or cowbells can be made from cast or pressed metal, glass or ceramic, but large bells such as a church, clock and tower bells are normally cast from bell metal. Bells intended to be heard over a wide area can range from a single bell hung in a turret or bell-gable, to a musical ensemble such as an English ring of bells, a carillon or a Russian zvon which are tuned to a common scale and ins ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Southwestern Bell Mobile Systems
Southwestern Bell Mobile Systems, Inc. was a wireless telephone company. It was created in 1984 as a split-off of Advanced Mobile Phone Service, the original wireless subsidiary of the Bell System. It was a division of Southwestern Bell Corporation. It continued to operate as Southwestern Bell Mobile Systems until 2000, when SBC Communications and BellSouth combined their wireless operations into a single company, Cingular Wireless. Southwestern Bell Mobile Systems' assets were then transferred to a Cingular as a limited liability company A limited liability company (LLC for short) is the US-specific form of a private limited company. It is a business structure that can combine the pass-through taxation of a partnership or sole proprietorship with the limited liability of ... named Cingular Southwestern Bell Mobile Systems, LLC. The company existed until 2006 when it was dissolved. Southwestern Bell Mobile Systems' physical assets survive in what is now AT&T Mobil ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
