TERMIUM Plus®
From: Translation Bureau
On social media
Consult the Government of Canada’s terminology data bank.
HALF-DUPLEX TRANSMISSION [5 records]
Record 1 - external organization data 2012-09-11
Record 1, English
Record 1, Subject field(s)
- Compartment - ISO/IEC JTC 1 Information Technology Vocabulary
Universal entry(ies) Record 1
Record 1, Main entry term, English
- half-duplex transmission
1, record 1, English, half%2Dduplex%20transmission
correct, standardized
Record 1, Abbreviations, English
Record 1, Synonyms, English
Record 1, Textual support, English
Record number: 1, Textual support number: 1 DEF
data transmission in either direction, one direction at a time in which the information is communicated after the transceiver has stopped transmitting the activation field 1, record 1, English, - half%2Dduplex%20transmission
Record number: 1, Textual support number: 1 OBS
cf. full-duplex transmission (01.02.06) 1, record 1, English, - half%2Dduplex%20transmission
Record number: 1, Textual support number: 2 OBS
Adapted from ISO/IEC 2382-9:1995, 09.03.06. 1, record 1, English, - half%2Dduplex%20transmission
Record number: 1, Textual support number: 3 OBS
half-duplex transmission : term and definition standardized by ISO/IEC [ISO/IEC 19762-1 : 2008]. 2, record 1, English, - half%2Dduplex%20transmission
Record 1, French
Record 1, Textual support, French
Record 1, Spanish
Record 1, Textual support, Spanish
Record 2 - internal organization data 2009-11-18
Record 2, English
Record 2, Subject field(s)
- Air Navigation Aids
- Telecommunications
Record 2, Main entry term, English
- simplex
1, record 2, English, simplex
correct, officially approved
Record 2, Abbreviations, English
Record 2, Synonyms, English
- half duplex 2, record 2, English, half%20duplex
Record 2, Textual support, English
Record number: 2, Textual support number: 1 DEF
A method in which telecommunication between two stations takes place in one direction at a time. 1, record 2, English, - simplex
Record number: 2, Textual support number: 1 OBS
In application to the aeronautical mobile service, this method may be subdivided as follows: a) single channel simplex; b) double channel simplex; c) offset frequency simplex. 1, record 2, English, - simplex
Record number: 2, Textual support number: 2 OBS
simplex: term and definition officially approved by the International Civil Aviation Organization (ICAO). 3, record 2, English, - simplex
Record number: 2, Textual support number: 3 OBS
In civil aviation, very high frequency (VHF) amplitude modulated (AM) radio is typically used for radio voice communication between personnel in the cockpit and personnel in the air traffic control tower. VHF AM radio utilizes "simplex" (also called "half duplex") mode: i.e. a particular channel is used for both sides of a two-way conversation, and only one party can talk at a time (also known as "two way radio"). 4, record 2, English, - simplex
Record number: 2, Textual support number: 4 OBS
Two definitions have arisen over time: a common definition, which is used as an ANSI [American National Standards Institute] standard and elsewhere, and an ITU-T [International Telecommunication Union - Telecommunication Standardization Sector] definition. The ITU definition of simplex is termed "half duplex" in other contexts. 5, record 2, English, - simplex
Record number: 2, Textual support number: 5 OBS
According to ANSI standard, simplex also refers to communication that occurs in one direction only, from one device to the next. In the simplex mode, one of the devices can transmit but cannot receive, or it receives but does not transmit. The half-duplex mode indicates a transmission in either direction, but it can take place in only one direction at a time. 2, record 2, English, - simplex
Record 2, Key term(s)
- half-duplex
Record 2, French
Record 2, Domaine(s)
- Aides à la navigation aérienne
- Télécommunications
Record 2, Main entry term, French
- simplex
1, record 2, French, simplex
correct, masculine noun, officially approved
Record 2, Abbreviations, French
Record 2, Synonyms, French
Record 2, Textual support, French
Record number: 2, Textual support number: 1 DEF
Méthode suivant laquelle les communications entre deux stations ont lieu dans un sens à la fois. 1, record 2, French, - simplex
Record number: 2, Textual support number: 1 OBS
Appliquée au service mobile aéronautique, cette méthode peut se subdiviser comme suit : a) simplex sur voie unique; b) simplex sur deux voies; c) simplex sur fréquences décalées. 1, record 2, French, - simplex
Record number: 2, Textual support number: 2 OBS
simplex : terme et définition uniformisés par l'Organisation de l'aviation civile internationale (OACI). 2, record 2, French, - simplex
Record 2, Spanish
Record 2, Campo(s) temático(s)
- Ayuda para la navegación aérea
- Telecomunicaciones
Record 2, Main entry term, Spanish
- símplex
1, record 2, Spanish, s%C3%ADmplex
correct, masculine noun, officially approved
Record 2, Abbreviations, Spanish
Record 2, Synonyms, Spanish
Record 2, Textual support, Spanish
Record number: 2, Textual support number: 1 DEF
Método en el cual las telecomunicaciones entre dos estaciones se efectúan cada vez en un solo sentido. 1, record 2, Spanish, - s%C3%ADmplex
Record number: 2, Textual support number: 1 OBS
En su aplicación al servicio móvil aeronáutico, este método puede subdividirse en la forma siguiente: a) simplex de canal único; b) simplex de doble canal; c) simplex de frecuencia aproximada. 1, record 2, Spanish, - s%C3%ADmplex
Record number: 2, Textual support number: 2 OBS
símplex: término y definición aceptados oficialmente por la Organización de Aviación Civil Internacional (OACI). 2, record 2, Spanish, - s%C3%ADmplex
Record 3 - external organization data 2009-08-04
Record 3, English
Record 3, Subject field(s)
- Compartment - ISO/IEC JTC 1 Information Technology Vocabulary
Universal entry(ies) Record 3
Record 3, Main entry term, English
- half-duplex transmission
1, record 3, English, half%2Dduplex%20transmission
correct, standardized
Record 3, Abbreviations, English
Record 3, Synonyms, English
Record 3, Textual support, English
Record number: 3, Textual support number: 1 DEF
data transmission in either direction, one direction at a time [ISO/IEC 2382-9:1995, 09.03.07] 1, record 3, English, - half%2Dduplex%20transmission
Record number: 3, Textual support number: 1 OBS
half-duplex transmission : term and definition standardized by ISO/IEC [ISO/IEC 19762-1 : 2008]. 2, record 3, English, - half%2Dduplex%20transmission
Record 3, French
Record 3, Textual support, French
Record 3, Spanish
Record 3, Textual support, Spanish
Record 4 - external organization data 2006-02-24
Record 4, English
Record 4, Subject field(s)
- Compartment - ISO/IEC JTC 1 Information Technology Vocabulary
Universal entry(ies) Record 4
Record 4, Main entry term, English
- half-duplex transmission
1, record 4, English, half%2Dduplex%20transmission
correct, standardized
Record 4, Abbreviations, English
Record 4, Synonyms, English
Record 4, Textual support, English
Record number: 4, Textual support number: 1 DEF
data transmission in either direction, one direction at a time 1, record 4, English, - half%2Dduplex%20transmission
Record number: 4, Textual support number: 1 OBS
half-duplex transmission : term and definition standardized by ISO/IEC [ISO/IEC 2382-9 : 1995]. 2, record 4, English, - half%2Dduplex%20transmission
Record 4, French
Record 4, Domaine(s)
- Tiroir - ISO/CEI JTC 1 Vocabulaire des technologies de l'information
Entrée(s) universelle(s) Record 4
Record 4, Main entry term, French
- transmission semi-duplex
1, record 4, French, transmission%20semi%2Dduplex
correct, feminine noun, standardized
Record 4, Abbreviations, French
Record 4, Synonyms, French
- transmission à l'alternat 1, record 4, French, transmission%20%C3%A0%20l%27alternat
correct, feminine noun, standardized
Record 4, Textual support, French
Record number: 4, Textual support number: 1 DEF
transmission de données dans un sens ou dans l'autre, mais non simultanément 1, record 4, French, - transmission%20semi%2Dduplex
Record number: 4, Textual support number: 1 OBS
transmission semi-duplex; transmission à l'alternat : termes et définition normalisés par l'ISO/CEI [ISO/IEC 2382-9:1995]. 2, record 4, French, - transmission%20semi%2Dduplex
Record 4, Spanish
Record 4, Textual support, Spanish
Record 5 - internal organization data 2004-09-09
Record 5, English
Record 5, Subject field(s)
- Internet and Telematics
Record 5, Main entry term, English
- half-duplex transmission
1, record 5, English, half%2Dduplex%20transmission
correct, standardized
Record 5, Abbreviations, English
Record 5, Synonyms, English
Record 5, Textual support, English
Record number: 5, Textual support number: 1 DEF
A data transmission in either direction, one direction at a time. 2, record 5, English, - half%2Dduplex%20transmission
Record number: 5, Textual support number: 1 OBS
half-duplex transmission : term standardized by ISO and CSA. 3, record 5, English, - half%2Dduplex%20transmission
Record 5, French
Record 5, Domaine(s)
- Internet et télématique
Record 5, Main entry term, French
- transmission semi-duplex
1, record 5, French, transmission%20semi%2Dduplex
correct, feminine noun, standardized
Record 5, Abbreviations, French
Record 5, Synonyms, French
- transmission à l'alternat 2, record 5, French, transmission%20%C3%A0%20l%27alternat
correct, feminine noun, standardized
Record 5, Textual support, French
Record number: 5, Textual support number: 1 DEF
Transmission de données dans un sens ou dans l'autre, mais non simultanément. 3, record 5, French, - transmission%20semi%2Dduplex
Record number: 5, Textual support number: 1 OBS
transmission semi-duplex; transmission à l'alternat : termes normalisés par l'ISO et la CSA. 4, record 5, French, - transmission%20semi%2Dduplex
Record 5, Spanish
Record 5, Campo(s) temático(s)
- Internet y telemática
Record 5, Main entry term, Spanish
- transmisión semidúplex
1, record 5, Spanish, transmisi%C3%B3n%20semid%C3%BAplex
correct, feminine noun
Record 5, Abbreviations, Spanish
Record 5, Synonyms, Spanish
Record 5, Textual support, Spanish
Record number: 5, Textual support number: 1 DEF
Transmisión de datos en ambas direcciones, pero solamente en una dirección cada vez. 1, record 5, Spanish, - transmisi%C3%B3n%20semid%C3%BAplex
Copyright notice for the TERMIUM Plus® data bank
© Public Services and Procurement Canada, 2026
TERMIUM Plus®, the Government of Canada's terminology and linguistic data bank
A product of the Translation Bureau
Features
GCtranslate (available on the Government of Canada network only)
Use this artificial intelligence prototype to translate Government of Canada content up to and including Protected B. Available to employees of selected departments and agencies only.
Writing tools
The Language Portal’s writing tools have a new look! Easy to consult, they give you access to a wealth of information that will help you write better in English and French.
Glossaries and vocabularies
Access Translation Bureau glossaries and vocabularies.
- Date Modified:


