Allows packets to be either transmitted or received, but not both at the same time.

Data flow in either direction, but not in both directions at the same time.

Signal can only go in one direction at a time, ie. a device can only transmit, OR receive, not both at the same time. A two-wire current loop is half-duplex, as is RS-485, IFSF LON, Ethernet and many others. Half-duplex uses less wires (two wires can be full-duplex, but the circuits are more complex), but requires some kind of protocol to avoid conflicts. In most forecourt protocols, it simply master-slave: a master device (the Enabler) transmits to a single pump, and then waits for a response from that pump. Other pumps are not supposed to transmit at the same time. IFSF and Ethernet use more complex rules so that any device can start transmitting at any time.

A communication channel over which both transmission and reception are possible, but only in one direction at a time.

Half-duplex describes a communication channel on which only one-way communication is permitted at a time. The line can be "turned around" to allow data to flow the other way. Some half-duplex links provide a special "reverse channel" in the direction opposite to the flow of data that permits transmission of control signals only. Compare with: full-duplex and simplex.

Referring to a type of sound card, a half-duplex card allows only one user to speak at a time while using an Internet phone application.

Communication between two devices whereby transmission takes place in only one direction at a time.

A communications protocol that permits transmission in both directions but in only one direction at a time.

A physical medium in which data .........travels in one direction.

One way communication at any one time. The send and receive portions of electronic communication are separate. Half-duplex is the standard mode.

Capability of transmitting or receiving, but not both simultaneously.

A communications channel over which both transmission and reception are possible but only in one direction at one time; e.g., a two-wire circuit.

It describes the transmission of data in two directions but only one way at a time

A circuit designed for transmission in either direction but not both directions simultaneously.

communications method where data is only sent in one direction at a time

A send-and-receive mode protocol that specifies session partners must take turns sending and receiving. Half-duplex contention enables LUs to send requests to each other, but not at the same time. Half-duplex flip-flop allows LUs to alternate sending requests to one another. Parameters in the BIND identify one of the LUs as "first speaker." The first speaker begins in the send state. The other LU becomes the sender when the first speaker sets the change direction indicator (CDI) in the request header of the last RU sent. The two LUs continue to switch between send and receive states until the session is deactivated. Conversations between type 6.2 logical units always use half-duplex flip-flop protocols.

The ability of a transmission facility to transport data in both directions but not simultaneously. Half-duplex facilities use modems (or DSUs) configured for "controlled carrier," also known as "switched carrier," (carrier controlled by RTS with data transmission controlled by CTS) at all locations. Note that some devices and protocols (e.g., BiSync) require full-duplex facilities but actually operate half-duplex.

See Full-duplex.

The communication mode in which a device is capable of either sending or receiving, but not simultaneously.

Data travels in one direction, or the other, using 100% of available bandwidth.

A method of two-way transmission, but data can only travel in one direction at a time. Contrast to full-duplex.

communications: In telecommunications, signal flow in both directions, but only one way at a time. This term sometimes refers to the activation of local echo which causes a copy of sent data to be shown on the sender's display.

The transmission of data in one direction at a time. Sometimes called Echo Off by communications programs, through that's not really the same thing.

A communications method in which one end transmits while the other receives, then the process is reversed. This was common in wide area point-to-multipoint circuits, such as those used in many SNA networks.Head End -A central point in a broadband network that receives signals on one set of frequency bands and retransmits them on another set of frequencies. The head end is viewed as a central hub. Every transmission on a broadband network must go through the head end.

A circuit designed for data transmission in two directions but not at the same time, similar to a CB radio.

In data communication, pertaining to transmission in only one direction at a time.

Transmission of data by only one device at a time over a two-wire network. Access Modules communicate with the host panel in half-duplex mode. Close Glossary Window

One way at a time data communication; both devices can transmit and receive data, but only one at a time.

The inability to send and receive data simultaneously which, in digital audio terms, translates to the inability to record and play audio at the same time. Many older sound cards are half-duplex. Most modern sound cards are capable of recording and playing audio simultaneously. This capability is called " Full-Duplex".

Pertaining to data communications that can be sent in only one direction at a time. Contrast with duplex.

A system capable of transmitting information in only one direction at a time over a communications channel.

Transfers Data in both direction, but not simultaneously. Normal operation is alternate, one-way-at-a-time transmission.

Communications in which data can be transmitted between two stations in both directions, but only one direction at a time.

Transmission: bidirectional link that is limited to one-way transfer of data, i.e., data cannot be sent both ways at the same time. Also referred to as simplex transmission. An example is the operation of a push-to-talk walkie talkie.