olemus
kõneside või andmeside tööviis:
korraga saab kõnelda/saata ainult üks osaline;
kõnelemiseks tuleb vajutada nupule ("push to talk")
=
communication in both directions, but only one direction at a time, not simultaneously in both directions

ülevaateid
https://www.educative.io/answers/what-are-simplex-half-and-full-duplex-communication-modes

https://en.wikipedia.org/wiki/Duplex_(telecommunications)#Half-duplex

http://www.studytonight.com/computer-networks/transmission-mode

vt ka
- dupleksside
- simpleks-