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  2. Duplex (telecommunications) - Wikipedia

    en.wikipedia.org/wiki/Duplex_(telecommunications)

    There are two types of duplex communication systems: full-duplex (FDX) and half-duplex (HDX). In a full-duplex system, both parties can communicate with each other simultaneously. An example of a full-duplex device is plain old telephone service; the parties at both ends of a call can speak and be heard by the other party simultaneously. The ...

  3. Two-way radio - Wikipedia

    en.wikipedia.org/wiki/Two-way_radio

    Two-way radios usually use a half-duplex communication channel, which permits two-way communication, albeit with the limitation that only one user can transmit at a time. (This is in contrast to simplex communication , in which transmission can only be sent in one direction, and full-duplex, which allows transmission in both directions ...

  4. Transmission medium - Wikipedia

    en.wikipedia.org/wiki/Transmission_medium

    A signal transmission may be simplex, half-duplex, or full-duplex. In simplex transmission, signals are transmitted in only one direction; one station is a transmitter and the other is the receiver. In the half-duplex operation, both stations may transmit, but only one at a time. In full-duplex operation, both stations may transmit simultaneously.

  5. Universal asynchronous receiver-transmitter - Wikipedia

    en.wikipedia.org/wiki/Universal_asynchronous...

    simplex (in one direction only, with no provision for the receiving device to send information back to the transmitting device) full duplex (both devices send and receive at the same time) half duplex (devices take turns transmitting and receiving) For UART to work the following settings need to be the same on both the transmitting and ...

  6. Session layer - Wikipedia

    en.wikipedia.org/wiki/Session_layer

    The session layer may provide three different dialogue types - two way simultaneous (full-duplex), two way alternate (half-duplex), and one way (simplex). It also provides the mechanisms to negotiate the type of the dialogue, and controls which side has the "turn" or "token" to send data or to perform some control functions.

  7. Two-way alternating - Wikipedia

    en.wikipedia.org/wiki/Two-way_alternating

    Two-way alternating communications are sometimes called half-duplex, but there may be a fine distinction that two-way alternating communications is a property of the communication protocol used between the endpoints, while the underlying communications medium may support either two-way alternating or two-way simultaneous communications. When ...

  8. Telecommunication circuit - Wikipedia

    en.wikipedia.org/wiki/Telecommunication_circuit

    In operational terms, a telecommunication circuit may be capable of transmitting information in only one direction (simplex circuit), or it may be bi-directional (duplex circuit). Bi-directional circuits may support half- duplex operation , when only one end of the channel transmits at any one time, or they may support full-duplex operation ...

  9. Communication channel - Wikipedia

    en.wikipedia.org/wiki/Communication_channel

    Simplex communication, duplex communication or half-duplex communication channel; Return channel; Uplink or downlink (upstream or downstream channel)