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Nextel
Nextel Communications, Inc. was an American wireless service operator that merged with and ceased to exist as a subsidiary of Sprint Corporation, which would later be bought by T-Mobile US and folded into that company. Nextel in Brazil, and formerly in Argentina, Chile, Peru, the Philippines, and Mexico, is part of NII Holdings, a stand-alone, publicly traded company not owned by Sprint Corporation. Nextel Communications traces its roots to the 1987 foundation of FleetCall by Morgan E. O'Brien, Morgan O'Brien, Brian McAuley, Chris Rogers, and Peter Reinheimer. FleetCall changed its name to Nextel Communications, Inc. in 1993. Nextel provided digital, wireless communications services, originally focusing on the fleet and dispatch customers, but later marketed to all potential wireless customers. Nextel's network operated in the 800-MHz Specialized Mobile Radio band and used iDEN technology developed by Motorola. Nextel's iDEN network offered a then unique push-to-talk "walkie-talk ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sprint Corporation
Sprint Corporation was an American telecommunications company. Before being acquired by 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 and Open Mobile brands and wholesale access to its wireless networks to mobile virtual network operators. In July 2013, majority ownership of the company was purchased by the Japanese telecommunications company SoftBank Group. Sprint used CDMA, EvDO and 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 around Abilene, Kansas. In 2006, Sprint left the local landline telephone business and spun those assets off into a n ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
NII Holdings
NII Holdings, Inc. (formerly Nextel International) was an American holding company that, through its subsidiary Nextel Telecomunicações Ltda., provided mobile communications services under the Nextel brand in Latin America. NII last operated 3G UMTS/HSDPA and 4G LTE networks in Brazil, and also operated an iDEN network there until its shutdown in 2018. On , NII Holdings completed the sale of its Brazilian operation, its last remaining subsidiary, to América Móvil. On the company filed a Certificate of Dissolution (liquidation) with the State of Delaware. In 2012, for the third consecutive year, NII Holdings ranked in the Fortune 500 and Barron's 500 lists. NII also has been named one of the best places to work among multinationals in Latin America by the Great Place to Work Institute. NII went through bankruptcy in 2014 and 2015. History NII originally launched as the international business unit of Nextel Communications as McCaw International in 1995. Later Nextel changes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Integrated Digital Enhanced Network
Integrated Digital Enhanced Network (iDEN) is a mobile telecommunications technology, developed by Motorola, which provides its users the benefits of a trunked radio and a cellular telephone. It was called the first mobile social network by many technology industry analysts. iDEN places more users in a given spectral space, compared to analog cellular and two-way radio systems, by using speech compression and time-division multiple access (TDMA). History The iDEN project originally began as MIRS (Motorola Integrated Radio System) in early 1991. The project was a software lab experiment focused on the utilization of discontiguous spectrum for GSM wireless. GSM systems typically require 24 contiguous voice channels, but the original MIRS software platform dynamically selected fragmented channels in the radio frequency (RF) spectrum in such a way that a GSM telecom switch could commence a phone call the same as it would in the contiguous channel scenario. Operating frequenc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
IDEN
Integrated Digital Enhanced Network (iDEN) is a mobile telecommunications technology, developed by Motorola, which provides its users the benefits of a Trunked radio system, trunked radio and a mobile phone, cellular telephone. It was called the first mobile social network by many technology industry analysts. iDEN places more users in a given spectral space, compared to analog cellular and two-way radio systems, by using speech compression and time-division multiple access (TDMA). History The iDEN project originally began as MIRS (Motorola Integrated Radio System) in early 1991. The project was a software lab experiment focused on the utilization of discontiguous spectrum for GSM wireless. GSM systems typically require 24 contiguous voice channels, but the original MIRS software platform dynamically selected fragmented channels in the radio frequency (RF) spectrum in such a way that a GSM telecom switch could commence a phone call the same as it would in the contiguous chan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boost Mobile
DISH Wireless L.L.C., doing business as Boost Mobile, is an American telecommunications company and wholly owned subsidiary of EchoStar Corporation. Boost Mobile is the List of mobile network operators in the United States, fourth largest wireless carrier in the United States. Together with its sister brands Gen Mobile and Ting Mobile, it serves 7.2 million subscribers as of March 31, 2025. Boost Mobile was founded as a joint venture between Peter Adderton, Craig Cooper, Kirt McMaster, and Nextel Communications in 2001. It was purchased by Nextel in 2003 and, as a result of the merger between Sprint Corporation and Nextel, then became owned by Sprint in 2005. It was then acquired by Dish Network on July 1, 2020, following the merger between Sprint and T-Mobile US, T-Mobile. After Dish's merger with EchoStar on December 31, 2023, Boost Mobile became a subsidiary of EchoStar. The company operates a 5G NR, 5G network covering over 80% of the American population. In addition to its ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Brian McAuley
Brian McAuley (born 1941) is an American entrepreneur and co-founder of Nextel Communications. In 1987, McAuley was a cellular executive when he and lawyer Morgan O'Brien founded Fleet Call, a telecom company, in New Jersey. It was renamed Nextel Communications in 1993, and grew rapidly with the support of Motorola, before merging with Sprint Corporation in 2005 for $35 billion. The new company became the third-largest wireless network operator in the United States. McAuley previously served as president and CEO of Nextel Communications for seven years. He also founded Boston-based mobile radio systems operator NeoWorld Communications in 1999, and served as its president and CEO. It was acquired by Nextel for $276 million in 2003. He was chairman of NASDAQ-listed Pacific DataVision, Inc., provider of mobile workforce management solutions. He is also a director for NYSE-listed United Rentals, Inc. and sits on the board for many non-profits. Brian McAuley holds a bachelor's degree ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Craig McCaw
Craig McCaw (born August 11, 1949) is an American businessman and entrepreneur, a pioneer in the cellular phone industry. He is the founder of McCaw Cellular (now part of AT&T Mobility) and Clearwire Corporation (now part of T-Mobile via the Sprint acquisition). Early life and cable TV beginnings McCaw is the second of four sons of Marion and J. Elroy McCaw. As a child, the family lived in the posh gated Highlands community north of Seattle, and McCaw attended Seattle's private Lakeside School, where he was later given a Lakeside Distinguished Alumni Award. McCaw's father was a broadcasting magnate and owner of Gotham Broadcasting Corporation. Gotham owned the New York City radio station WINS, which became one of the first stations to play rock and roll, with Alan Freed being one of the earliest famous disc jockeys on the station. McCaw's father was in the business of buying and selling TV and radio stations, which brought in wealth but also incurred significant debts. Elroy ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jack Markell
Jack Alan Markell (born November 26, 1960) is an American politician and diplomat. He had served the United States ambassador both to Italy and to San Marino. He had served as the United States ambassador to the Organisation for Economic Co-operation and Development. He previously served as the 73rd governor of Delaware from 2009 to 2017. He is a member of the Democratic Party. Markell served three terms as the state treasurer of Delaware from 1999 to 2009. After term-limited Governor Ruth Ann Minner was prevented from running for reelection, Markell announced his intention to run. He defeated lieutenant governor of Delaware John Carney with 51% of the vote in the Democratic primary, and defeated the Republican nominee, former Delaware Superior Court judge Bill Lee, with 67% of the vote in the 2008 general election, becoming Delaware's first Jewish governor. Markell won reelection in 2012 by a margin of over 40%. On May 12, 2023, President Joe Biden nominated Markell to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Global Positioning System
The Global Positioning System (GPS) is a satellite-based hyperbolic navigation system owned by the United States Space Force and operated by Mission Delta 31. It is one of the global navigation satellite systems (GNSS) that provide geolocation and time information to a GPS receiver anywhere on or near the Earth where there is an unobstructed line of sight to four or more GPS satellites. It does not require the user to transmit any data, and operates independently of any telephone or Internet reception, though these technologies can enhance the usefulness of the GPS positioning information. It provides critical positioning capabilities to military, civil, and commercial users around the world. Although the United States government created, controls, and maintains the GPS system, it is freely accessible to anyone with a GPS receiver. Overview The GPS project was started by the U.S. Department of Defense in 1973. The first prototype spacecraft was launched in 1978 an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mark Warner
Mark Robert Warner (born December 15, 1954) is an American businessman and politician serving as the senior United States senator from Virginia, a seat he has held since 2009. A member of the Democratic Party, Warner served as the 69th governor of Virginia from 2002 to 2006. He is vice chair of the Senate Democratic Caucus and vice chair of the Senate Intelligence Committee. In 2006, Warner was widely expected to pursue the Democratic nomination in the 2008 U.S. presidential election, but he announced in October 2006 that he would not run, citing a desire not to disrupt his family life. Warner delivered the keynote address at the 2008 Democratic National Convention, and was considered to be a potential vice presidential candidate until he took himself out of consideration after winning the Democratic nomination for the U.S. Senate. Warner was elected to the Senate in 2008 and reelected in 2014 and 2020. He became Virginia's senior senator in 2013, when Senator Jim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
T-Mobile US
T-Mobile US, Inc. is an American wireless network operator headquartered in Bellevue, Washington. Its majority shareholder and namesake is the German telecommunications company Deutsche Telekom. T-Mobile is the second largest wireless carrier in the United States, with 131 million subscribers as of March 31, 2025. The company was founded in 1994 by John W. Stanton of the Western Wireless Corporation as VoiceStream Wireless. Deutsche Telekom then gained plurality ownership in 2001 and renamed it after its global T-Mobile brand. , the German company holds a 51.4% stake in the company. T-Mobile US operates two main brands: T-Mobile and Metro by T-Mobile (acquired in a 2013 reverse takeover of MetroPCS that also led to T-Mobile's listing on the NASDAQ). In 2020, T-Mobile expanded through the acquisition of Sprint, which also made T-Mobile the operator of Assurance Wireless, a service subsidized by the federal Lifeline program. The company's growth continued in 2024 wit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Half-duplex
A duplex communication system is a point-to-point system composed of two or more connected parties or devices that can communicate with one another in both directions. Duplex systems are employed in many communications networks, either to allow for simultaneous communication in both directions between two connected parties or to provide a reverse path for the monitoring and remote adjustment of equipment in the field. There are two types of duplex communication systems: full-duplex (FDX) and half-duplex (HDX). In a full-duplex system, both parties can communicate with each other simultaneously. An example of a full-duplex device is plain old telephone service; the parties at both ends of a call can speak and be heard by the other party simultaneously. The earphone reproduces the speech of the remote party as the microphone transmits the speech of the local party. There is a two-way communication channel between them, or more strictly speaking, there are two communication channel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
