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One set of codes was originally developed by Cable & Wireless Ltd. (the Cable & Wireless Service Z code) for commercial communications in the early days of wire and radio communications. Many of the old C&W codes are derived from mnemonics (ZAL = alter wavelength, ZAP = ack please, ZSF = send faster, etc.) The old C&W Z codes are not widely ...
ACP-131 [1] is the controlling publication for the listing of Q codes and Z codes. It is published and revised from time to time by the Combined Communications Electronics Board (CCEB) countries: Australia, New Zealand, Canada, United Kingdom, and United States.
Q and Z codes, also called Q and Z signals may refer to: Q code , 3-letter code beginning with Q and used by radiotelegraph and other radio services Z code , 3-letter code used in radio communications
This is an accepted version of this page This is the latest accepted revision, reviewed on 15 January 2025. Letter names for unambiguous communication Not to be confused with International Phonetic Alphabet. Alphabetic code words A lfa N ovember B ravo O scar C harlie P apa D elta Q uebec E cho R omeo F oxtrot S ierra G olf T ango H otel U niform I ndia V ictor J uliett W hiskey K ilo X ray L ...
Q and Z signals are brevity codes widely used in Morse code radio telegraphy. See, respectively: Q code; Z code This page was last edited on 29 ...
Changes were also made to X, Y, and Z. This left only four codepoints identical to the original Morse code, namely E, H, K and N, and the latter two had their dahs extended to full length. The original American code being compared dates to 1838; the later American code shown in the table was developed in 1844. [17]
Operating signals are a type of brevity code used in operational communication among radio and telegraph operators. For example: Prosigns for Morse code; 92 Code: telegraph brevity codes; Q code: initially developed for commercial radiotelegraph communication and adopted by other radio services; QN Signals: published by the ARRL and used in ...
Brevity codes, including Ten-codes, and Phillips Code; and operating signals, including 92 code, Q code, and Z code; should be used as a last choice, as these lists of codes are so extensive that it is unlikely that all participants have the full and correct definitions memorized.