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Police Radio
Police radio is a radio system used by police and other law enforcement agencies to communicate with one another. Police radio systems almost always use two-way radio systems to allow for communications between police officers and dispatchers. Most modern police radio systems are encrypted, and many jurisdictions have made listening to police radio frequencies as a private citizen illegal. History Before police radio systems were first implemented, police officers assigned to their beat could only communicate with police command using telephone booths, call boxes, police boxes, or physical meetings. Calling for help or signaling other officers could only be done by shouting, using a whistle, or hitting things to make sounds. This meant that properly calling for assistance, reporting an incident or arrest, being dispatched to handle a crime, or requesting police resources was only possible if the officer reached a telephone or call box. The first police radio systems we ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio Operator - Royal Thai Police Na Wa
Radio is the technology of telecommunication, communicating using radio waves. Radio waves are electromagnetic waves of frequency between 3 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmitter connected to an antenna (radio), antenna which radiates the waves. They can be received by other antennas connected to a radio receiver; this is the fundamental principle of radio communication. In addition to communication, radio is used for radar, radio navigation, radio control, remote control, remote sensing, and other applications. In radio communication, used in radio and television broadcasting, cell phones, two-way radios, wireless networking, and satellite communication, among numerous other uses, radio waves are used to carry information across space from a transmitter to a receiver, by Modulation, modulating the radio signal (impressing an information signal on the radio wave by varying some aspect of the wave) in the tran ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Federal Communications Commission
The Federal Communications Commission (FCC) is an independent agency of the United States government that regulates communications by radio, television, wire, internet, wi-fi, satellite, and cable across the United States. The FCC maintains jurisdiction over the areas of broadband access, fair competition, radio frequency use, media responsibility, public safety, and homeland security. The FCC was established pursuant to the Communications Act of 1934 to replace the radio regulation functions of the previous Federal Radio Commission. The FCC took over wire communication regulation from the Interstate Commerce Commission. The FCC's mandated jurisdiction covers the 50 states, the District of Columbia, and the territories of the United States. The FCC also provides varied degrees of cooperation, oversight, and leadership for similar communications bodies in other countries in North America. The FCC is funded entirely by regulatory fees. It has an estimated fiscal-2022 budg ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wireless Telegraphy Act 2006
The Wireless Telegraphy Act 2006 (c. 36) is an act of the Parliament of the United Kingdom. This act repealed the Wireless Telegraphy Act 1949. The Wireless Telegraphy Act 2006 had as its purpose to "consolidate enactments about wireless telegraphy". The act was successful as cited in ''Office of Communications and another v. Floe Telecom Ltd'' 009EWCA Civ 47 to show that in the absence of a licence or exemption granted or made under section 8 of the act, it is unlawful to use Global System for Mobile Communications (GSM) gateways (including commercial multi-user gateways) for the purpose of providing a telecommunications service by way of business to another person. Section 126 – Short title and commencement Section 126(2) provides that the act came into force at the end of the period of three months that began on the date on which it was passed. The word "months" means calendar months. The day (that is to say, 8 November 2006) on which the act was passed (that is to say, re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Morse Code
Morse code is a telecommunications method which Character encoding, encodes Written language, text characters as standardized sequences of two different signal durations, called ''dots'' and ''dashes'', or ''dits'' and ''dahs''. Morse code is named after Samuel Morse, one of the early developers of the system adopted for electrical telegraphy. International Morse code encodes the 26 ISO basic Latin alphabet, basic Latin letters to , one Diacritic, accented Latin letter (), the Arabic numerals, and a small set of punctuation and procedural signals (Prosigns for Morse code, prosigns). There is no distinction between upper and lower case letters. Each Morse code symbol is formed by a sequence of ''dits'' and ''dahs''. The ''dit'' duration can vary for signal clarity and operator skill, but for any one message, once the rhythm is established, a beat (music), half-beat is the basic unit of time measurement in Morse code. The duration of a ''dah'' is three times the duration ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wireless
Wireless communication (or just wireless, when the context allows) is the transfer of information (''telecommunication'') between two or more points without the use of an electrical conductor, optical fiber or other continuous guided transmission medium, medium for the transfer. The most common wireless technologies use radio waves. With radio waves, intended distances can be short, such as a few meters for Bluetooth, or as far as millions of kilometers for NASA Deep Space Network, deep-space radio communications. It encompasses various types of fixed, mobile, and portable applications, including two-way radios, Mobile phone, cellular telephones, personal digital assistants (PDAs), and wireless networking. Other examples of applications of radio ''wireless technology'' include Global Positioning System, GPS units, garage door openers, wireless Mouse (computing), computer mouse, Keyboard (computing), keyboards and Headset (audio), headsets, headphones, radio receivers, satelli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wireless Telegraphy
Wireless telegraphy or radiotelegraphy is the transmission of text messages by radio waves, analogous to electrical telegraphy using electrical cable, cables. Before about 1910, the term ''wireless telegraphy'' was also used for other experimental technologies for transmitting telegraph signals without wires. In radiotelegraphy, information is transmitted by pulses of radio waves of two different lengths called "dots" and "dashes", which spell out text messages, usually in Morse code. In a manual system, the sending operator taps on a switch called a telegraph key which turns the transmitter on and off, producing the pulses of radio waves. At the radio receiver, receiver the pulses are audible in the receiver's speaker as beeps, which are translated back to text by an operator who knows Morse code. Radiotelegraphy was the first means of radio communication. The first practical radio transmitters and radio receiver, receivers invented in 1894–1895 by Guglielmo Marconi used radi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Nottingham City Police
Nottingham City Police, originally founded as the Borough of Nottingham Police, was a Law enforcement in the United Kingdom, UK police force created under the Municipal Corporations Act 1835 in the style of Robert Peel's Metropolitan Police which initially launched in 1836. This initial force failed and was re-founded successfully in 1841. It had responsibility for law enforcement within the geographic area as defined by the boundaries of the city of Nottingham. Under the Police Act 1964 the force was compulsorily amalgamated with Nottinghamshire County Police to form the Nottinghamshire Combined Constabulary, now renamed Nottinghamshire Police. Founding and early history The force was founded originally in 1836 with a body of three police officers working days and 12 police officers working evenings. The previously existing system of night Watchman (law enforcement), watchmen was retained for the hours of darkness. The force operated under the existing High Constable William Barn ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Athelstan Popkess
Captain Athelstan Horn Popkess (23 November 1893 – 29 April 1967) was Chief Constable of Nottingham City Police from 1930 to 1959 and as a result of his transformations in modernising policing could be considered the twentieth century's greatest police officer in the UK according to a 2020 biography. He achieved particular notoriety following an investigation into corruption in Nottingham City Council in an incident which became known as "The Popkess Affair" due to the false suspicion that he had leaked information. Background Born in Kynsnam, near to Bedford, in Cape Colony (now the Eastern Cape of South Africa). Popkess attended Officer Training School in his youth and on the outbreak of the First World War he enlisted in the Rhodesia Regiment as a lieutenant. He was initially deployed to help quell a Boer uprising but saw no combat. His first taste of battle was the major infantry engagement at Trekkopjes during which he was shot clean through the leg. Whilst being ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Norwegian Police Service
The Norwegian Police Service () is the Norwegian national civilian police agency. The service dates to the 13th century when the first sheriffs were appointed, and the current structure established in 2003. It comprises a central National Police Directorate, seven specialty agencies and twelve police districts. The government agency is subordinate to the Ministry of Justice and Public Security and has 16,000 employees, of which 8,000 are police officers. In addition to police powers, the service is responsible for border control, certain civil duties, coordinating search and rescue operations, counterterrorism, highway patrolling, writ of execution, criminal investigation and prosecution. The directorate is led by National Police Commissioner Marie Benedicte Bjørnland. Each police district is led by a chief of police and is subdivided into several police stations in towns and cities, and sheriffs' offices for rural areas. The Governor of Svalbard acts as chief of police ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prefectural Police
In the Law enforcement in Japan, law enforcement system in Japan, are prefecture-level Law enforcement agency, law enforcement agencies responsible for Police, policing, law enforcement, and public security within their respective Prefectures of Japan, prefectures of Japan. Although prefectural police are, in principle, regarded as municipal police, they are mostly under the central oversight and control of the National Police Agency (Japan), National Police Agency. As of 2020, the total strength of the prefectural police is approximately 260,000 police officer, sworn officers and 28,400 civilian staff, a total of 288,400 employees. History In the Police services of the Empire of Japan, Empire of Japan, territorial police forces were organised as . They were placed under complete centralized control, with the of the Home Ministry at their core. After the surrender of Japan, the Supreme Commander for the Allied Powers regarded this centralized police system as undemocratic. Du ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
National Police Agency (Japan)
The is the central coordinating law enforcement agency of the Law enforcement in Japan, Japanese police system. Unlike National Police (other), national police in other countries, the NPA does not have any operational units of its own aside from the Imperial Guard (Japan)#Imperial Guard of the National Police Agency, Imperial Guard; rather, it is responsible for supervising Japan's 47 prefectural police departments and determining their general standards and policies, though it can command police agencies under it in national emergencies or large-scale disasters. It is under the National Public Safety Commission (Japan), National Public Safety Commission of the Cabinet Office (Japan), Cabinet Office. As of 2017, the NPA has a strength of approximately 7,800 personnel: 2,100 police officer, sworn officers, 900 guards, and 4,800 civilian staff. History Police services of the Empire of Japan were placed under complete centralized control with the of the Home Ministry (Ja ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
