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A numbers station is a shortwave radio station characterized by broadcasts of formatted numbers, which are believed to be addressed to intelligence officers operating in foreign countries. [1] Most identified stations use speech synthesis to vocalize numbers, although digital modes such as phase-shift keying and frequency-shift keying , as well ...
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 ...
What phone number shall we call to make station to station call to officer Nr. ...? Advise phone number for station to station call Advise present telephone number of ... 10-89 Request radio service man be sent to this station... Radio transmission — Bomb threat Technical: 10-90 Radio service man will be at your station ....
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 ...
The United States was divided into nine "Radio Inspection" districts, [31] and amateur and Special Land stations were issued call signs that started with the district number in which they were located, followed by two letters. The first letter for standard amateur stations came from the range A-W.
The following is a list of full-power radio stations, HD Radio subchannels and low-power translators in the United States broadcasting Air1 programming, which can be sorted by their call signs, frequencies, city of license, state and broadcast area. Blue background indicates a low-power FM translator. Gray background indicates an HD Radio ...
A call for service is assigned an incident number, which resets to the number 1—citywide—at midnight each night. Upon receiving the call for service, the Radio Telephone Operator (RTO) will go on the air to broadcast to the division (with the option to simulcast on bureau-wide, geographically adjacent or citywide frequencies).
Radio failure (lost communications). [3] [7] 7601–7607 US: Reserved for special use by FAA. [3] 7610–7676 US: External ARTCC subset (block of discrete codes). [3]
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