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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 status ...
Radio users will confine all radio transmissions to an emergency in progress or a new incident. Radio traffic which includes status information such as responding, reports on conditions, at scene and available will not be authorized during this period. Emergency Traffic Term used to gain control of radio frequency to report an emergency.
A police radio dispatcher's desk from the Netherlands. Emergency service response codes are predefined systems used by emergency services to describe the priority and response assigned to calls for service. Response codes vary from country to country, jurisdiction to jurisdiction, and even agency to agency, with different methods used to ...
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.
The York County Chiefs of Police Association discussed with York County making the police calls private to protect the personal information that was broadcast over the radio, said Ted Czech ...
In the Americas (defined as International Telecommunication Union (ITU) region 2), the FM broadcast band consists of 101 channels, each 200 kHz wide, in the frequency range from 87.8 to 108.0 MHz, with "center frequencies" running from 87.9 MHz to 107.9 MHz. For most purposes an FM station is associated with its center frequency.
In Denver, the move to encrypt radio traffic sparked backlash from media organizations who used the scanner for breaking news coverage. So in 2021, the Colorado legislature passed a law requiring ...
Any citizen could monitor outgoing police radio traffic on their home sets. The system was "one way" until the mid-1930s when mobile transmitters were installed in patrol units. In 1949, the FCC changed KGPL's callsign to KMA367. This was later changed again at an unspecified point in time; the LAPD's current primary radio callsign is KJC625.