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Personal Communications Network
Personal communications network (PCN) is the European digital cellular mobile telephone network, developed in accordance with GSM standards. The PCN system was first initiated by Lord Young, UK Secretary of State for Trade and Industry, in 1988. The main characteristics of PCN are as follows: # Operating frequency – 1.7–1.88 GHz (1710–1785 MHz and 1805–1880 MHz). # Uses 30 GHz or up for microwave back bone system. # Covers both small cells and large cells. # Coverage inside and outside buildings. # Hand over. # Cell delivery. # Portable hand set. # User intelligent network. PCN uses the DCS-1800 systems, which is similar to GSM The Global System for Mobile Communications (GSM) is a standard developed by the European Telecommunications Standards Institute (ETSI) to describe the protocols for second-generation ( 2G) digital cellular networks used by mobile devices such ..., but up converts the frequency to 1.7–1.88 GHz, therefore the network structure, the signal s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
David Young, Baron Young Of Graffham
David Ivor Young, Baron Young of Graffham, (27 February 1932 – 9 December 2022) was a British Conservative politician, cabinet minister and businessman. Early life David Young was born into an orthodox Jewish family in London. His father was born in Yurevich, near Minsk, a village that is now in Belarus but was then largely populated by Lithuanian Jews, including Young's own family. The family fled an antisemitic pogrom to England when David's father was 5. In England, Young's father imported flour and later set up as a manufacturer of coats for children. Young went to Christ's College in Finchley and then University College London, to take a law degree as an evening student during his time as an articled clerk to become a solicitor, being admitted to the roll of solicitors in 1955. Business career Having qualified as a solicitor, Young practised for only a year, after which he joined Great Universal Stores as an executive, working for part of that time as an assistant t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Secretary Of State For Trade And Industry
The secretary of state for business, energy and industrial strategy, is a secretary of state in the Government of the United Kingdom, with responsibility for the Department for Business, Energy and Industrial Strategy. The incumbent is a member of the Cabinet of the United Kingdom. The incumbent Business Secretary is Grant Shapps who was appointed by Rishi Sunak on 25 October 2022. Responsibilities Corresponding to what is generally known as a commerce minister in many other countries, the business secretary's remit includes: * Oversight of science, research and innovation in Britain * Relations with domestic and international business * Policy relating to climate change * Policy relating to deregulation * Policy relating to energy security * Oversight of energy policy and industrial policy History During the government of Sir Alec Douglas-Home, the then President of the Board of Trade Edward Heath was given in addition the job of Secretary of State for Industry, Trade an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
DCS-1800
GSM frequency bands or frequency ranges are the cellular frequencies designated by the ITU for the operation of GSM mobile phones and other mobile devices. Frequency bands GSM frequency usage around the world A dual-band 900/1800 device is required to be compatible with most networks apart from deployments in ITU Region 2. GSM-900, EGSM/EGSM-900 and GSM-1800 GSM-900 and GSM-1800 are used in most parts of the world (ITU-Regions 1 and 3): Africa, Europe, Middle East, Asia (apart from Japan and South Korea where GSM has never been introduced) and Oceania. In common GSM-900 is most widely used. Fewer operators use GSM-1800. Mobile Communication Services on Aircraft (MCA) uses GSM-1800. In some countries GSM-1800 is also referred to as "Digital Cellular System" (DCS). GSM-850 and GSM-1900 GSM-1900 and GSM-850 are used in most of North, South and Central America (ITU-Region 2). In North America, GSM operates on the primary mobile communication bands 850 MHz and 1900 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telephony
Telephony ( ) is the field of technology involving the development, application, and deployment of telecommunication services for the purpose of electronic transmission of voice, fax, or data, between distant parties. The history of telephony is intimately linked to the invention and development of the telephone. Telephony is commonly referred to as the construction or operation of telephones and telephonic systems and as a system of telecommunications in which telephonic equipment is employed in the transmission of speech or other sound between points, with or without the use of wires. The term is also used frequently to refer to computer hardware, software, and computer network systems, that perform functions traditionally performed by telephone equipment. In this context the technology is specifically referred to as Internet telephony, or voice over Internet Protocol (VoIP). Overview The first telephones were connected directly in pairs. Each user had a separate telephone wired ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
