Why is it called half-duplex?
- River EuphratesLv 71 month agoFavorite Answer
As far as I can tell, the terms 'simplex', 'half-duplex', and 'full duplex' originated with the Western Union Telegram company.
I'm not sure how they came up with the terms, but 'simplex' refers to a system that can send data, but not receive (like a radio station), 'half-duplex' is a system that can send and receive - but only one at a time (like a two-way radio), and 'full-duplex' allows simultaneously two-way communication (telephone).
- ∅Lv 71 month ago
because it does half of what full duplex does: