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A police code is a brevity code, usually numerical or alphanumerical, used to transmit information between law enforcement over police radio systems in the United States. Examples of police codes include " 10 codes " (such as 10-4 for "okay" or "acknowledged"—sometimes written X4 or X-4), signals, incident codes, response codes , or other ...
The first police radio systems were implemented in Detroit in 1928, when the Detroit Police Department set up a one-way radio system to broadcast crime information to police cars. [2] The frequency was assigned the call sign "KOP" by the Federal Communications Commission .
The police version of ten-codes is officially known as the APCO Project 14 Aural Brevity Code. [ 1 ] The codes, developed during 1937–1940 and expanded in 1974 by the Association of Public-Safety Communications Officials-International (APCO), allow brevity and standardization of message traffic.
Jack Alicoate, ed. (1939), "Louisiana", Radio Annual, New York: Radio Daily, OCLC 2459636 – via Internet Archive "AM Stations in the U.S.: Louisiana", Radio Annual Television Year Book, New York: Radio Television Daily, 1963, OCLC 10512375 – via Internet Archive; Beth Norwood (1964). "French Radio Broadcasting in Louisiana". Southern Speech ...
The Louisiana State Police (French: Police d’Etat de Louisiane) is the state police agency of Louisiana, which has jurisdiction anywhere in the state, headquartered in Baton Rouge. [3] It falls under the authority of the Louisiana Department of Public Safety & Corrections. It is officially known in that organization as the Office of State Police.
"State: Louisiana". TV Query Broadcast Station Search. Washington DC: Federal Communications Commission. "Louisiana: News and Media: Television". DMOZ. AOL. (Directory ceased in 2017) Louisiana Association of Broadcasters "Louisiana - Television Stations". Station Index. "Louisiana TV stations". Newslink. "Louisiana TV Stations". Mondo Times.
There is significant scope for interference however, both on frequency and on adjacent frequencies, as the band is far from free. The frequencies from 430 to 440 MHz are allocated on a secondary basis to licensed radio amateurs who are allowed to use up to 40 W (16 dBW) between 430 and 432 MHz and 400 W (26 dBW) between 432 and 440 MHz.
The state of Louisiana is served by the following area codes: 225, which serves the Baton Rouge area and parts of south central Louisiana; 318, which serves northern Louisiana; 337, which serves southwestern Louisiana; 504, which serves the New Orleans area; 985, which serves the sections of southeast Louisiana which are not within the 504 area ...