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RadioMail
Mobitex is an OSI model, OSI based open standard, national public access WWAN, wireless packet-switched data network. Mobitex puts great emphasis on safety and reliability with its use by military, police, firefighters and ambulance services. It was developed in the beginning of the 1980s by the Swedish Televerket (Sweden), Televerket Radio. From 1988 the development took place in Eritel, a joint-venture between Ericsson and Televerket, later on as an Ericsson subsidiary. Mobitex became operational in Sweden in 1986. In the mid-1990s Mobitex gained consumer popularity by providing two-way communication, two-way paging (telecommunications), paging network services. It was the first wireless network to provide always on, wireless push email services such as RadioMail and Inter@ctive Paging. It is also used by the first model of Research in Motion, Research in Motion's BlackBerry, and Personal digital assistant, PDAs such as the Palm VII. During September 11, 2001 attacks, 9/11 and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RadioMail
Mobitex is an OSI model, OSI based open standard, national public access WWAN, wireless packet-switched data network. Mobitex puts great emphasis on safety and reliability with its use by military, police, firefighters and ambulance services. It was developed in the beginning of the 1980s by the Swedish Televerket (Sweden), Televerket Radio. From 1988 the development took place in Eritel, a joint-venture between Ericsson and Televerket, later on as an Ericsson subsidiary. Mobitex became operational in Sweden in 1986. In the mid-1990s Mobitex gained consumer popularity by providing two-way communication, two-way paging (telecommunications), paging network services. It was the first wireless network to provide always on, wireless push email services such as RadioMail and Inter@ctive Paging. It is also used by the first model of Research in Motion, Research in Motion's BlackBerry, and Personal digital assistant, PDAs such as the Palm VII. During September 11, 2001 attacks, 9/11 and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
OSI Model
The Open Systems Interconnection model (OSI model) is a conceptual model that 'provides a common basis for the coordination of SOstandards development for the purpose of systems interconnection'. In the OSI reference model, the communications between a computing system are split into seven different abstraction layers: Physical, Data Link, Network, Transport, Session, Presentation, and Application. The model partitions the flow of data in a communication system into seven abstraction layers to describe networked communication from the physical implementation of transmitting bits across a communications medium to the highest-level representation of data of a distributed application. Each intermediate layer serves a class of functionality to the layer above it and is served by the layer below it. Classes of functionality are realized in all software development through all and any standardized communication protocols. Each layer in the OSI model has its own well-defined functi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Narrowband
Narrowband signals are signals that occupy a narrow range of frequencies or that have a small fractional bandwidth. In the audio spectrum, narrowband sounds are sounds that occupy a narrow range of frequencies. In telephony, narrowband is usually considered to cover frequencies 300–3400 Hz, i.e. the voiceband. In radio communications, a narrowband channel is a channel in which the bandwidth of the message does not significantly exceed the channel's coherence bandwidth. In the study of wired channels, ''narrowband'' implies that the channel under consideration is sufficiently narrow that its frequency response can be considered flat. The message bandwidth will therefore be less than the coherence bandwidth of the channel. That is, no channel has perfectly flat fading, but the analysis of many aspects of wireless systems is greatly simplified if flat fading can be assumed. Two-way radio narrowband Two-Way Radio Narrowbanding refers to a U.S. Federal Communications Commiss ... [...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] |
Velocita Wireless
Velocita Wireless is a national wireless-telecommunications service provider that is based in Woodbridge, New Jersey, United States. Known by several names over the years, Velocita Wireless has been in existence for over 17 years as the operator of the Mobitex network in the United States. Previously known as Cingular Interactive, L.P., BellSouth Wireless Data and prior to that RAM Mobile Data, Velocita Wireless carved a market for itself with the acquisition of the Mobitex network from Cingular and rebranding itself overall as Velocita in 2004. History In 2001, the company's Mobitex network proved to be effective in communications in Manhattan during the September 11, 2001 terrorist attacks. Most other cellular and wireless telecommunications services were knocked-out or overloaded in New York City. The effectiveness of the network led to Velocita developing a small 'following' amongst emergency responders in the United States. In 2006, Velocita Wireless became a strategic buy ... [...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] |
BellSouth
BellSouth, LLC (stylized as ''BELLSOUTH'' and formerly known as BellSouth Corporation) was an American telecommunications holding company based in Atlanta, Georgia. BellSouth was one of the seven original Regional Bell Operating Companies after the U.S. Department of Justice forced the American Telephone & Telegraph Company to divest itself of its regional telephone companies on January 1, 1984. In a merger announced on March 5, 2006, and executed on December 29, 2006, AT&T Inc. (originally SBC Communications) acquired BellSouth for approximately $86 billion (1.325 shares of AT&T for each share of BellSouth). The merger also consolidated ownership of Cingular Wireless and Yellowpages.com, both of which were joint ventures between BellSouth and AT&T. With the merger completed, wireless services previously offered by Cingular Wireless were then offered under the AT&T name, and BellSouth Telecommunications (a subsidiary of Bell Operating Company) began doing business as AT&T Southe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RAM Mobile Data
RAM Mobile Data was founded by RAM Broadcasting Corporation as American Mobile Data Communications, Inc. in 1988.RAM Broadcasting Corporation was an owner of regional paging companies and cellular companie The name of the company was changed to Ram Mobile Data in 1989. RAM Mobile Data was the U.S. Operator of the Mobitex network. RAM Mobile Data was sold and renamed BellSouth Wireless Data in 1995 and later became Cingular Interactive when BellSouth and SBC Communications formed Cingular Wireless. The Mobitex division within Cingular Wireless was sold to an investment company in 2005 and became Velocita Wireless. Velocita Wireless was purchased by Sprint Nextel and became a Sprint Nextel Company in early 2006. Today RAM Mobile Data is the exclusive operator of Mobitex in the Netherlands. With headquarters in Utrecht (NL) and a daughter in Brussels (BE), they are running the entire Mobitex operations throughout the BeNeLux The Benelux Union ( nl, Benelux Unie; french: Union Be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Common Carrier
A common carrier in common law countries (corresponding to a public carrier in some civil law systems,Encyclopædia Britannica CD 2000 "Civil-law public carrier" from "carriage of goods" usually called simply a ''carrier'') is a person or company that transports goods or people for any person or company and is responsible for any possible loss of the goods during transport.Longman Business English Dictionary A common carrier offers its services to the general public under license or authority provided by a regulatory body, which has usually been granted "ministerial authority" by the legislation that created it. The regulatory body may create, interpret, and enforce its regulations upon the common carrier (subject to judicial review) with independence and finality as long as it acts within the bounds of the enabling legislation. A common carrier (also called a ''public carrier'' in British English) is distinguished from a contract carrier, which is a carrier that transports goo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rogers Wireless
Rogers Wireless Inc. is a Canadian mobile network operator, wireless telephone company headquartered in Toronto, providing service nationally throughout Canada. It is a wholly owned subsidiary of Rogers Communications. The company had revenues of just under $15.1 billion in 2018. Rogers Wireless is the List of Canadian mobile phone companies, largest wireless carrier in Canada, with 10.8 million subscribers as of Q3 2020. The company was originally started by David Margolese as an expansion of his pager firm, Canadian Telecom, formed in 1978. With the 1983 introduction of Advanced Mobile Phone System, AMPS, the first North American standard for cell phones, Margolese started plans to expand the company into this new market. This required large amounts of capital. A group of private investors consisting of Margolese, Edward Samuel Rogers, Ted Rogers, Marc Belzberg and Philippe de Gaspé Beaubien formed the newly renamed Cantel in 1984 and opening for service in July 1985. Rogers p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rogers Communications
Rogers Communications Inc. is a Telecommunications in Canada, Canadian communications and media company operating primarily in the fields of mobile phone operator, wireless communications, cable television, telephony and Internet access, Internet, with significant additional telecommunications and mass media assets. Rogers has its headquarters in Toronto, Ontario. The company traces its origins to 1925 when Edward S. Rogers Sr. founded Rogers Vacuum Tube Company to sell battery-less radios, although this present enterprise dates to 1960, when Edward S. Rogers Jr., Ted Rogers and a partner acquired the CHFI-FM radio station; they then became part-owners of a group that established the CFTO-DT, CFTO television station. The chief competitor to Rogers is Bell Canada, which has a similarly extensive portfolio of radio and television media assets, as well as wireless, television distribution, and telephone services, particularly in Eastern and Central Canada. The two companies are oft ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbon Copy
Before the development of photographic copiers, a carbon copy was the under-copy of a typed or written document placed over carbon paper and the under-copy sheet itself (not to be confused with the carbon print family of photographic reproduction processes). When copies of business letters were so produced, it was customary to use the acronym "CC" or "cc" before a colon and below the writer's signature to inform the principal recipient that carbon copies had been made and distributed to the parties listed after the colon. With the advent of word processors and e-mail, "cc" is used as a merely formal indication of the distribution of letters to secondary recipients. Use A sheet of carbon paper is placed between two or more sheets of paper. The pressure applied by the writing implement (pen, pencil, typewriter or impact printer) to the top sheet causes pigment from the carbon paper to reproduce the similar mark on the copy sheet(s). More than one copy can be made by stacking s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
