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  2. Ten-code - Wikipedia

    en.wikipedia.org/wiki/Ten-code

    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 .

  3. Police code - Wikipedia

    en.wikipedia.org/wiki/Police_code

    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 ...

  4. Emergency service response codes - Wikipedia

    en.wikipedia.org/wiki/Emergency_service_response...

    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 ...

  5. Emergency Alert System - Wikipedia

    en.wikipedia.org/wiki/Emergency_Alert_System

    Connecticut State Police did not receive any calls related to the incident. [ 101 ] [ 102 ] [ 103 ] On June 26, 2007 at 7:35 a.m. CDT , an Emergency Action Notification was accidentally issued in Illinois , when a new satellite receiver at the state's EOC was accidentally connected to a live system before final internal testing of the new ...

  6. Connecticut State Police - Wikipedia

    en.wikipedia.org/wiki/Connecticut_State_Police

    The Connecticut State Police was created under House Bill #247 on May 29, 1903. Initially, five men, paid three dollars a day, were hired to enforce state liquor and vice laws, making it one of the oldest State Police forces in the nation. [3]

  7. Call signs in the United States - Wikipedia

    en.wikipedia.org/.../Call_signs_in_the_United_States

    The original radio stations were primarily used for private point-to-point communication. The early 1920s saw the introduction of radio broadcasting, and by the end of 1922 there were over 500 broadcasting stations operating in the United States. Most of the first broadcasting stations received randomly assigned three-letter call signs.

  8. Police radio - Wikipedia

    en.wikipedia.org/wiki/Police_radio

    A minority of other police radio systems, the largest examples being the Milwaukee Police Department and Pennsylvania State Police, use the incompatible OpenSky format. TETRA , the standard in many European countries as well as other places in the world, is virtually unused in the United States.

  9. Signal strength and readability report - Wikipedia

    en.wikipedia.org/wiki/Signal_strength_and...

    The QSA code and QRK code are interrelated and complementary signal reporting codes for use in wireless telegraphy . They replaced the earlier QSJ code. They replaced the earlier QSJ code. Currently, the QSA and QRK codes are officially defined in the ITU Radio Regulations 1990, Appendix 13: Miscellaneous Abbreviations and Signals to Be Used in ...