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Police radio systems historically used public radio frequencies, and listening to them was, for the most part, legal. Most modern police radio systems switched to encrypted radio systems in the 1990s and 2000s to prevent eavesdroppers from listening in.
The following is a list of Federal Communications Commission–licensed radio stations in the American state of Louisiana, which can be sorted by their call signs, frequencies, cities of license, licensees, and programming formats.
This is a list of law enforcement agencies in Louisiana.. According to the US Bureau of Justice Statistics' 2008 Census of State and Local Law Enforcement Agencies, the state had 348 law enforcement agencies employing 18,050 sworn police officers, about 405 for each 100,000 residents.
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 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.
The development of the APCO Ten Signals began in 1937 [5] to reduce use of speech on the radio at a time when police radio channels were limited. Credit for inventing the codes goes to Charles "Charlie" Hopper, communications director for the Illinois State Police , District 10 in Pesotum, Illinois .
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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.