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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 codes. These code types may be used in the same sentence to describe specific aspects of a situation. Codes vary by country, administrative subdivision, and agency.
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.
StarCom21 uses about 186 radio towers throughout the state of Illinois, many owned by state agencies. It uses radio channels in the 700 and 800 MHz bands, all licensed to the State of Illinois. It uses APCO-25 9600 baud control channel frequencies and APCO-25 digital modulation.
The Illinois State Police (ISP) is the state police agency of the U.S. state of Illinois.The Illinois State Police is responsible for traffic safety on more than 300,000 miles of total roadway, including 2,185 miles of interstate highways and 15,969 miles of state highways.
This is a list of the area codes in the state of Illinois and its numbering plan areas in the North American Numbering Plan.. All NPAs within Illinois. 217/447: Central Illinois, including the region running west from the Illinois-Indiana border through Danville, Effingham, Champaign–Urbana, Decatur, Springfield, Quincy until Illinois' western border with Missouri and Iowa
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 ...
The following is a list of FCC-licensed radio stations in the U.S. state of Illinois, which can be sorted by their call signs, frequencies, cities of license, licensees, and programming formats. List of radio stations
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 ...