There are two types of radio networks currently in use around the world: the one-to-many broadcast network commonly used for public information and mass media entertainment; and the two-way type used more commonly for public safety and public services such as police, fire, taxicabs, and delivery services. Many of the same components and much of the same basic technology applies to both.
The Two-way type of radio network shares many of the same technologies and components as the Broadcast type radio network but is generally set up with fixed broadcast points (transmitters) with co-located receivers and mobile receivers/transmitters or Tran-ceivers. In this way both the fixed and mobile radio units can communicate with each other over broad geographic regions ranging in size from small single cities to entire states/provinces or countries. There are many ways in which multiple fixed transmit/receive sites can be interconnected to achieve the range of coverage required by the jurisdiction or authority implementing the system: conventional wireless links in numerous frequency bands, fibre-optic links, or micro-wave links. In all of these cases the signals are typically backhauled to a central switch of some type where the radio message is processed and resent (repeated) to all transmitter sites where it is required to be heard.
In contemporary two-way radio systems a concept called trunking is commonly used to achieve better efficiency of radio spectrum use and provide very wide ranging coverage with no switching of channels required by the mobile radio user as it roams throughout the system coverage. Trunking of two-way radio is identical to the concept used for cellular phone systems where each fixed and mobile radio is specifically identified to the system Controller and its operation is switched by the controller. See also the entries Two-way radio and Trunked radio system to see more detail on how various types of radios and radio systems work.
Other articles related to "radio":
... The station previously broadcast a very diverse college radio format, but now broadcasts the GPB radio feed from Atlanta, with some student specialty shows ... In August 1994, WWGC became an affiliate of Public Radio International ...
1994) was an American actor, producer, and director whose career spanned five decades in radio, film ... A radio writer and actor, he moved to Hollywood, California, after his World War II service and played a series of character roles in films ... He created the role of Marshall Matt Dillon for popular radio series Gunsmoke (1952–1961) and narrated the television adventures of Rocky and ...
... Good News, a popular MGM radio program of the 1930s and '40's, publicizing upcoming films ... The previews of the films were interspersed with comedy skits and guest appearances by celebrities not necessarily connected with the films being promoted, but under contract to MGM ...
... KSEV is a talk station at 700 on the AM radio dial and is available throughout the Houston, Texas area ... matters, local politics, and several syndicated talk radio programs ... competitors are two well established AM stations (KPRC, KTRH), and newer talk radio outlet KNTH ...
... Conrad's deep, resonant voice led to a number of roles in radio, most prominently Marshal Matt Dillon on Western-genre program Gunsmoke ... The producers originally rejected him for the part due to his ubiquitous presence on so many radio dramas and the familiarity of his voice ... television in 1955, executives at CBS did not cast Conrad or his radio costars, despite a campaign to get them to change their minds ...
Famous quotes containing the words network, type and/or radio:
“Parents need all the help they can get. The strongest as well as the most fragile family requires a vital network of social supports.”
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“All radio is dead. Which means that these tape recordings Im making are for the sake of future history. If any.”
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