Operating signals: Difference between revisions

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{{short description|Signals for management of telegraph circuits}}

{{Use dmy dates|date=May 2023}}

'''Operating signals''' are a type of [[brevity code]] used in operational communication among radio and telegraph operators. For example:

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* [[Q code]]: initially developed for commercial radiotelegraph communication and adopted by other radio services

* [[QN Signals]]: published by the [[ARRL]] and used in [[Amateur radio]]

* [[R code]] and S Codebrevity codes: published by the British Post Office in 1908 for coastal wireless stations and ships, superseded in 1912 by Q codes<ref name=":0pre-1912">{{Cite web|url=httphttps://ac6v.com/rcode.htmphp|title=R Pre-1912 CODES AND SBrevity Codes|last=Anderson|first=Scott|date=2002- CODES07-31}}</ref>

* X code: used by European military services in wireless telegraphy

* [[Z code]]: used in early radiotelegraph communication

==See also==

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{{Morse code}}

[[Category:Operating signals| ]]