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A police radio 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 ...
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.
Code 1: A time critical event with response requiring lights and siren. This usually is a known and going fire or a rescue incident. Code 2: Unused within the Country Fire Authority. Code 3: Non-urgent event, such as a previously extinguished fire or community service cases (such as animal rescue or changing of smoke alarm batteries for the ...
The APCO phonetic alphabet, a.k.a. LAPD radio alphabet, is the term for an old competing spelling alphabet to the ICAO radiotelephony alphabet, defined by the Association of Public-Safety Communications Officials-International [1] from 1941 to 1974, that is used by the Los Angeles Police Department (LAPD) and other local and state law enforcement agencies across the state of California and ...
• 10-98 Requesting Backup Unit, Code 1 There are 10-Codes that are still used in daily communications that are not approved by SOP. Some of those include: 10-7 Out of service; 10-8 In service; 10-20 Location; 10-15 Detainee or arrestee; 10-23 Arrived on scene or in area; 10-42 Meet / contact reporting person(s) 10-49 Non-injury motor vehicle ...
In May 1928, Police Commissioner Joseph A. Warren doubled the number of existing units. [7] By 1929, the Emergency Service Squad consisted of eleven trucks and was staffed by over 250 sergeants and patrolmen, and an additional nine trucks and over 200 more personnel were scheduled to be added in January 1930.
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By the last quarter of 2006 police forces had migrated radio networks from the UHF frequencies to TeTRa on the Airwave network, followed by ambulance services in 2007 and fire services in 2010. [6] Airwave now has a nationwide network of more than 3,000 sites and provides secure voice and data communications to over 300 public safety organisations.