Modems used in the systems operate in a half-duplex mode.
Data transmission can be half-duplex, simulated half-duplex, and full-duplex.
The range of such a communications system is determined by the properties of a modulated-reflector half-duplex link.
The communication channel is half-duplex with no channel turnaround.
half-duplex in Technology
communications (hdx, from telegraphy) 1. A type of communication channel using a single circuit which can carry data in either direction but not both directions at once. Compare: simplex, full-duplex. 2. An obsolete term for local echo. (2001-07-21)