occurring at different speeds in different computers connected by a data transmission link; -- said of methods data of transmission between computers. Opposite of synchronous.
data transmitted over a serial link not synchronised to the receiver by a common clock. Transmission may start at any time, cf. synchronous
The arrangement in a data communication system whereby every character to be printed is sent independently (framed) and there is no associated clock.
A data transmission method that does not require a clock synchronization signal for maintaining data integrity. Transmission is characterized by individual characters, surrounded by start and stop bits.
Asynchronous - what we're doing in this course. We're not meeting together at specific times. (The opposite term is "synchronous" and includes technologies like 2-way videoconferencing, face-to-face classes, chat rooms, etc.) One good source of information: JALN: Journal of Asynchronous Learning Networks
In data communications, a transmission method in which information is sent one character at a time. Each letter, number or other character is delineated by a start and stop indicator at the beginning and end of the character. After a time interval, another character is sent. This system increases transmission times because of extra data in packets.
Occurring without a regular time relationship, i.e., timing independent.
Mode of data transmissions in which the time occurrence of the bits within each character or block of characters relates to a fixed time frame, but the start of each character or block of characters is not related to this fixed time frame.
communications: Literally, an event not happening at the same time as another event. Usually refers to computers exchanging information over phone lines, when they do not know precisely how long it will take to send each piece of information. Data is preceded by a start bit and followed by a stop bit since the time between transmitted characters varies. Lately heard often as part of the name of a high-speed wide-area communications protocol: Asynchronous Transfer Mode (ATM).
A method of data transmission in which one machine sends data one character at a time to another, without either machine preparing for the transmission.
With reference to video and data signals and devices: not being precisely in step, not of the same frequency, or not happening together in time.
The transmission of computerized information by individual frames having start and stop signals. Data is transmitted in irregular spurts, where the time interval varies between successive transmitted frames.
Without regular time relationship; unexpected and unpredictable with respect to the processing of program instructions. Contrast with synchronous.
Describes events that occur independently of each other but on a similar time scale.
a network where transmission system payloads are not synchronized, and each network terminal runs on its own clock
An operation that proceeds independent of any timing mechanism, such as a clock. Compare with synchronous.
Transmission by individual bytes, not related to specific timing on the transmitting end.
A signal whose data is acknowledged or acted upon immediately, irrespective of any clock signal.
1) Communications method that transmits each character as a single entity set apart from all other characters by a "start bit" and a "stop bit." 2) A reference to the fact that two different data streams, while nominally at the same speed, may have slight variations from each other. That is, they are tied to a different "reference clock." It is quite common for the 28 T1s in a T3 stream to be "asynchronous" to each other. 3) Data transmitted in a packet format. The asynchronous transfer mode (ATM) of Broadband ISDN refers to the transmission of packetized data. Compare with synchronous.
(2003-02-03) Chris Limb A communications channel capable of transmitting data but not timing is called 'asynchronous'. Strictly speaking, the correct terminology is 'asynchronous'.
A process that does not occur in " real time." In distance education, the learning that typically occurs via email would be asynchronous since there is typically a time delay between when the message is sent and when a reply is received. (See also synchronous.)
Literally, not at the same time, the term refers to computer communications where sender and receiver do not communicate directly with one another, but rather through accessing a common pick-up/drop-off point for information.
A process in a computer that, once triggered, executes independently of the main clock. In asynchronous transmission of serial data, the time between each binary character varies. Therefore each transmission has to begin with a “start” bit and end with a “stop” bit so that the receiving end knows where the beginning and end are.
Having no set pattern, cycle or speed of transmission; each character, word, or small block of information is individually synschronized, usaully by the use of start and stop elements.
A communications method in which data is sent as soon as it is ready, as opposed to methods in which data is sent at fixed intervals. It is commonly used at speeds of 110 to 19,200 b/s. Compare with: synchronous.
a system (e.g. computer, circuit, devices) in which events are not executed in a regular time relationship. They are timing-independent. Each event or operation is performed upon receipt of a signal generated by the completion of a previous event or operation, or upon availability of the system resources required by the event or operation. [SILC99][TOP OF THE PAGE
Occurring without a regular or predictable time relationship to a specified event, e.g., the transmission of characters one at a time as they are keyed. Contrast with Synchronous.
Failure of events to occur in time with each other.
1. adj. Pertaining to two or more processes that do not depend upon the occurrence of specific events such as common timing signals. 2. adj. Without regular time relationship; unexpected or unpredictable with respect to the execution of program instructions.
in online learning, an event in which people are not logged on at the same time. For example, the instructor might publish a lecture on a website and learners would read it when their schedules permit. Contrast with synchronous.
Not having a regular time or clocked relationship. See synchronous. A type of computer operation in which a new instruction is initiated when the former instruction is completed. Thus, there is no regular time schedule, or clock, with respect to instruction sequence. The current instruction must be complete before the next is begun, regardless of the length of time the current instruction takes.
A process where data is transmitted intermittently and at unpredictable intervals, as opposed to a constant transmission stream.
Not all elements of a device or system operating at the same time, nor in a predetermined sequence.
Transmission where sending and receiving devices are not synchronized. Data must carry signals to indicate data division.
An event that is time-independent.
Literally, "not at the same time." Distance learning can be delivered three ways -- live, asynchronously, or a combination of the two. Likewise, interactivity may be provided in the same three ways. Asynchronous interactivity may present special challenges on both the technical and the teaching sides. E-mail or fax is a relatively low tech form of asynchronous interactivity. In more developed systems, asynchronous interactivity may be assimilated with "live" responses in a database. The ability to deliver instruction and interactivity asynchronously is an important element of customer convenience and, hence, economy of scale for the entire network.
If events are asynchronous, they do not have to happen in any particular order, and one event's occurrence does not depend on the occurrence of another event. For example, with the Catalyst Peer Review tool, students can submit their comments at any time; comments can be received in any order, and other students do not have to be online at the same time.
A method of data transfer in which the device cannot proceed to the next block of data until it has received positive acknowledgment that the other device received the block correctly.
A term used to describe distance education study in which instruction can be received by students wherever and whenever they desire, as long as they have access to the Internet or, in the case of correspondence education, to the mail. See also "Synchronous."
a signal that is transmitted at a different clock rate than another signal. Synchronous signals are those that run at the same clock rate.
Asynchronous transmission. An approach for acquiring synchronisation on a per byte basis. Start and stop bits are used as delimiters. Asynchronous transfer. An efficient approach for transmitting information where time slots are used on a demand basis (e.g. ATDM, ATM) rather than on a periodical basis (e.g. TDM, STM).
Where each communicating device works at its won speed without external timing (example - modems, FAX machines, TCP/IP communications are asynchronous)
A transmission method in which information is transferred one discrete character at a time and is delineated by a start and stop indicator at the beginning and end of the character. The opposite of asynchronous is SYNCHRONOUS transmission.
Information that is not synchronized to a continuously running clock. With asynchronous transmission, each character begins with a 'start' bit and ends with a 'stop' bit and the clock is only synchronized for the duration of the character.
not at the same time, as in an asynchronous on-line course, in which the faculty leaves messages for students, who read them later. Opposite of synchronous.
A communications protocol where one character is sent at a time that is surrounded by a start bit and a stop bit, or sometimes a parity bit. There is an interval between characters.
(as opposed to synchronous) describes an activity that proceeds concurrently, independent of the state of progress of another activity. For example, most separate Windows applications are running at the same time in asynchronous processes. auto-detection Montage Shortcut feature whereby the presence of the target application window is automatically detected and monitored, even though it was not launched by this Shortcut. Auto-detected Shortcuts have a distinctive mode of highlighting, and they can be used to control the target window, even though this Shortcut doesn't "own" it. This capability is particularly useful for exclusive document applications. For example Montage uses auto-detection in Shortcuts to other montages, and a variation called lazy auto-detection for Shortcuts to Word documents.
happening at different times. An example is USENET interaction, where one person may respond to a message that someone else wrote on a previous date. (see Synchronous)
A communications mode in which data is sent without being synchronized by a clock or timer. A variety of methods are used to facilitate correct transmission, including (but not limited to) the use to start and stop bits. Also called start/stop or TTY. Contrast with synchronous.
A process or event that occurs without synchronization to a reference clock.
Use of the web site is available at any time.
an event or operation not controlled by the master clock.
An asynchronous event is an event that you start and it works in the background during idle time the whole time you are doing something else.
A process that can occur at any time, regardless of the status of the operating systems or applications that are running. An example if Windows NT’s asynchronous procedure call (APC).
Literally, not synchronized. Usually refers to communications where a data stream is not tied to a specific clock speed. Modems transfer data asynchronously.
Literally, not at the same time. Interaction is delayed over time. Some examples are Discussion Boards, Online Forums, and email. Antonym: Synchronous
describes buffers or events (typically, across multiple recording channels) that are NOT coordinated in time.
Characteristic of any operation that is independent of a master clock or time signals; also refers to information that is sent or exchanged independent of any specific time.
A method of transmitting data in which transmissions can begin at any time with character bits having equal time duration.
Not in sync - usually applied to rotating equipment which generates power at a different frequency than the power grid. Synchronization with the grid is obtained through solid state inverters.
(i.e. Not Synchronous) A form of concurrent input and output communication transmission with no timing relationship between the two signals. Slower-speed asynchronous transmission requires start and stop bits to avoid a dependency on timing clocks (10 bits to send on 8-bit byte). (Contrast with Synchronous)
A style of processing, typically used when describing communication. In synchronous processing, the initiating party waits for a response before moving on to other tasks. In asynchronous processing, the initiating process will initiate the process, such as starting a thread or sending a message, and will not wait for a response but instead will move on to other processing. When a response is desired/required, the response comes via another avenue to complete the interaction.
Having a variable time interval between successive data or information in the form of characters, operations, events. Transmission in which the data or information is individually synchronized or timed usually by start and stop bits (S/S).
A type of transmission in which each character is transmitted independently without reference to a standard clock. Can also mean that there are different capacities for data transfer in each direction, for example the old 90/200 baud modems and the new ADSL.
Not occurring at exactly the same time. People communicating with asynchronous means receive, compose, and send their messages when they deem convenient. Examples are discussion boards, e-mail, and voice mail.
Intermittent, not synchronized or continuous. A "conversational" type of communication that allows the parties at each end to "talk" when they like instead of at a prescribed time. Used in videoconferencing.
Property of an interaction which isn't synchronous.
a type of serial communications standard on virtually all PCs (i.e., via COM ports)
Lacking synchronization. In video, a signal is asynchronous when its timing differs from that of the system reference signal. A foreign video signal is asynchronous before a local frame synchronizer treats it.
Any operation that proceeds without the control of a clock or timing mechanism.
Asynchronous communications is a form of communication by which two applications communicate independently, without requiring both to be simultaneously available for communications. A process sends a request and may or may not be idle while waiting for a response. It is a popular non-blocking communications style. Most popular data communications protocols (IP, ATM, Frame Relay, etc) rely on asynchronous methods.
Occurring at different times; for example, electronic bulletin boards are said to be an asynchronous form of communication because messages are typically posted at one time and read at another.
A video signal that is not synchronised to the local reference (or camera) signal.
The transmission of data between a transmitting and a receiving device that occurs as a series of zeros and ones. For the data to be "read" correctly, the receiving device must begin reading at the proper point in the series. In asynchronous communication, this coordination is accomplished by having each character surrounded by one or more start and stop bits which designate the beginning and ending points of the information (see Synchronous).
In this context, asynchronous describes communication between individuals or groups of individuals using email, bulletin boards, web pages or other static textual internet exchanges.
Different users accessing the same channel of communication (email, news groups, etc.) can submit data independently of one another. Other users do not have to wait until a submission is finished before submitting data of their own, and users do not have to be connected to the network simultaneously.
Data communication in which transmission is sent by individual bytes at different time intervals.
A method of transmitting data in which the data elements are identified with special start and stop characters. An asynchronous modem cannot communicate with a synchronous modem. Compare with Synchronous (e.g. standard Hayes compatible modem).
The method of transmitting data where each bit is transmitted with no external clock.
independent in time, unsynchronized
The term asynchronous is usually used to describe communications in which data can be transmitted intermittently rather than in a steady stream. For example, a telephone conversation is asynchronous because both parties can talk whenever they like. If the communication were synchronous, each party would be required to wait a specified interval before speaking. Most communications between computers and devices are asynchronous.
Not synchronized; that is, not occurring at predetermined or regular intervals. The term asynchronous is usually used to describe communications in which data can be transmitted intermittently rather than in a steady stream. For example, a telephone conversation is asynchronous because both parties can talk whenever they like. If the communication were synchronous, each party would be required to wait a specified interval before speaking. (See also Synchronous as opposing technology)
In telecommunications context: describes communications in which data can be transmitted intermittently rather than in a steady stream.
Data that is transmitted without an associated clock signal. The time spacing between data characters or blocks may be of arbitrary duration. Opposite of synchronous.
Learning in which interaction between instructors and students occurs intermittently with a time delay. Examples are self-paced courses taken via the Internet or CD-ROM, Q&A mentoring, online discussion groups, and email.
A type of communication on the Web that does not required participants to be present at the same time
An attribute referring to the potential unpredictability of the order in which events occur. Two tasks executing in parallel are asynchronous with respect to each other if their execution speeds are mutually independent and thus it is not possible to predict which will be the first to arrive at a given place in the program.
Not synchronized in time. For example, input events are controlled by the user; the program can read them later.
Refers to electronic communication which does not take place simultaneously, such as an e-mail exchange or messages posted and read on newsgroups or bulletin boards.
This term is usually used to describe communications in which data can be transmitted in broken parts rather than in a steady stream.
McIDAS-X commands that run asynchronously will return control to the original calling program before they have run to completion. Also see synchronous.
Transferring data with the help of start and stop bits that indicate the beginning and end of each character being sent.
In a communications sense, the ability to transmit each character as a self-contained unit of information, without additional timing information. This method of transmitting data is sometimes called start/stop. Synchronous working involves the use of timing information to allow transmission of data, which is normally done in blocks. Synchronous transmission is usually more efficient than the asynchronous method.
Not coordinated in time; contrasted with synchronous. In a typical synchronous protocol, each successive transmission of data requires a response to the previous transmission before a new one can be initiated. An asynchronous protocol allows transmissions to occur independently of one another. In computer communications using asynchronous protocols, each piece of data usually has a start bit at the beginning and a stop bit at the end, so that the valid data can be distinguished from random noise. Most communications between computers and devices are asynchronous; the public Internet is based on an asynchronous system.
refers, among other things, to techniques that do not require a common clock between communicating devices. Because IT streams and files are self-clocking, timing signals are derived from framing bits within the data stream.
Not at the same time, or not dependent on something happening at the same time. Email, fax, and voice mail are forms of asynchronous communications.
Not guaranteed to enforce coincidence in clock time. In an asynchronous communication operation, the sender and receiver may or may not both be engaged in the operation at the same instant in clock time.
This term, meaning 'not together in time', refers to methods of communication such as post, e-mail, voice-mail and discussion boards, which do not rely on the sender and recipient being present at the same time. Back
Typical transmission method of dial up modems. Data is transmitted using a start bit at the beginning of a character and a stop bit at the end. The time interval between characters may be of varying lengths. Synchronous data uses an external reference clock to unify both ends of the data circuit
The term asynchronous refers to actions that do not occur within the same time frame. In an online context, an asynchronous discussion refers to a communication that occurs when the participants and the moderator are not linked online at the same time. Messages are created, posted and read at a time convenient to each participant.
(voir Asynchrone) Term designating two or more processes that are not regulated in a synchronous mode.
It means there is a lack of synchronization. A method of transmitting data over a network using a start bit at the beginning of a character and a stop bit at the end. The time intervak between characters may be varying lengths. In video, a signal is asynchronous when its timing differs from that of the system reference signal.
Data communication in which transmission is not related to specific timing between communicating devices.
Communication in which interaction between parties does not take place simultaneously.
Not occurring at exactly the same time. Asynchronous conversations use "store and forward" tools, in which participants compose and send their messages at times convenient to themselves. These messages are stored on the network until a time convenient to the recipient. Examples of asynchronous communications are e-mail and voice mail.
Data transmission that is not related to the timing, or a specific frequency, of a transmission facility; transmission characterized by individual characters, or bytes, encapsulated with start and stop bits, from which a receiver derives the necessary timing for sampling bits; also, start/stop transmission.
A type of communication that can occur at any time and at irregular intervals, meaning that people can communicate online without a pattern of interaction. It is the predominant mode of communication used in e-mail, in usenet groups, and on bulletin boards and Web sites.
Not interactively, or in real time. For example, a letter sent via Royal Mail is asynchronous, since there is a significant (!) time lag between posting and receiving the letter. The postal service could not be used to hold a conversation in the normal manner because of this delay, and so is said to be asyncronous.
Lacking a relationship to a time base or clock. In asynchronous communications, individual data characters are sent at an arbitrary rate.
In a data communication system, an arrangement without an associated clock that ensures that every character is transmitted independently.
(async) Serial data is transmitted in one of two ways, synchronous (sync) or asynchronous (async). Async communications involve the use of a start bit to signal the beginning of a character and a stop bit to signal the end of the character.
independent of time; not based in real time or occurring at the same time. An asynchronous training event is not constrained by time issues such as scheduling. 90% of current online training is in self-study, asynchronous format. Advantages: self-study, self-paced, convenient. Disadvantages: no immediate feedback, no real-time human interaction decreases trainee motivation, and learner isolation. Example: self-study online course, e-mail, threaded discussions. See synchronous.
(adj.) Literally, "apart from time." Asynchronous communication technologies are effective even when speakers and listeners do not participate at the same time. Electronic mail and books are examples of asynchronous technologies; both allow the sender to deposit information into the future.
occuring a different times. Email, answering machines, videotapes, and most broadcast TV are examples of asynchronous communication.
A communication method where data is sent when it is ready without being referenced to a timing clock, rather than waiting until the receiver signals that it is ready to receive.
Occurring at different times. For example, electronic mail is asynchronous communication because it does not require the sender and receiver to be connected at the same time.
Happening at a different time. Literally, not coinciding in time. Handlers for queued events run asynchronously; that is, they are invoked after the current event has been handled. see: dispatch, event, synchronous
(1) Occurring without a regular or predictable time relationship to a specified event. (2) In data communication, a method of transmission in which the bits representing a character are preceded by a start bit and followed by a stop bit, which are used to separate the characters and to synchronize the receiving with the transmitting station. It does not use a regular time relationship between the sending and receiving devices.
A communications protocol where data is transferred character by character usually, but not necessarily, at the speed which an operator is entering data through a keyboard.
Synchronous communication assumes a well-defined and regularly timed exchange of information between the two applications (RPCs, for example). An asynchronous model allows communication without the need for a coordinated communication channel. For example, with an "off-line" queuing facility, one application can pass information to another that need not be running at the time.
communication: This has the characteristic of the participants being separated in time, even if not necessarily by distance. This allows services to be shared by a greater number of users in circumstances where bandwidth is insufficient to facilitate the required users using syncronous communication techniques.
In video, signals are asynchronous when their timing differs one from another. Switching between asynchronous sources usually produces an undesirable flicker and momentary color shift (in NTSC). Systems within a properly designed facility are linked to a master clock and are therefore synchronous. A foreign video signal is asynchronous, but can be brought "into time" by patching or routing it through a local frame synchronizer.
a learning mode in which the time of actual instruction and the reception of the instruction are different. The sender and receiver do not communicate at the same time. In other words, you can truly take the course any time, any place.
A method of transmitting data. A low-cost alternative to synchronous communications. One or more bits are added to the beginning and the end of each data character in asynchronous communications. This allows the receiver of the signal to recognise the characters being sent. Asynchronous is the simplest form of communications since it does not require the sender and receiver to each have a clock to time each other to "stay in synch". However, the addition of these extra bits (called "framing" bits) means that more bits have to be transmitted in asynchronous communications to get the same message across than in other methods, like synchronous communications.
If events are asynchronous, they do not have to happen in any particular order, and one event's occurrence does not depend on the occurance of another event. Asynchronous communication is communication in which parties participate at different times.
Occurring at different times. In an asynchronous class, learners and the instructor use such technologies as e-mail and listservers to interact; each sends and receives messages at individually convenient times, with no need for simultaneous ("real time") communication.
A type of communication that occurs with a time delay between steps in the dialog, allowing participants to respond at their own convenience. Literally “not synchronous”; in other words, not at the same time. Asynchronous capabilities give learners access to course materials, including readings, embedded and streamed multimedia, and external Web sites. They also let learners participate in facilitated discussions, and complete assignments individually and collaboratively. A more narrow definition is offered by the ALN Network.
communications A form of communication enabling applications to operate independently, so they do not have to be running or available simultaneously. A process sends a request and may or may not wait for a response.
Communication in which sending and receiving processes place no constraints on each other in terms of completion. The communication operation between the two processes may also overlap with computation.
Data transfer protocol which is not synchronized to a set timing interval. Asynchronous SCSI data transmitting devices must wait after each byte for acknowledgement from the receiving device. Either device can take as long as it wishes to send or acknowledge data. Asynchronous SCSI has no defined maximum transfer rate but is typically limited to 1.5 to 3MHz.
From a technical standpoint, asynchronous refers to a communication mode that does not happen simultaneously. In the context of on-line dialogue, asynchronous citizen engagement refers to an on-linedialogue between participants that occurs over a preset period of time butdoes not require simultaneous contribution by the group members.
A type of transmission in which each character is transmitted independently without reference to a standard clock; uses stop and start bits.
Circuitry or operation without common clock or timing signals.
Communications without a regular time basis allowing transmission at unequal rates.
Digital operations triggered by external, untimed events and not by a fixed frequency clock. Signals which clock independently from each other.
Transmittal of RF energy at irregular time intervals, as typified by local area network data systems. Asynchronous data UPCS devices operate at 1910-1920 MHz.
communication (text-based or voice-based) not requiring participants to be present at the same time, e.g. email, discussion board
When used to define a code set, character codes that contain start and stop bits. When used to define data transmission, a signal that does not need separate clock synchronization signal for data reception. Asynchronous transmission is also called start-stop transmission, because one character is sent at a time.
Occurring at different times. In the context of communication, the label asynchronous is used with technologies such as email and threaded discussions where users communicate with no expectation of receiving an immediate response from other communicators.
Asynchronous transmission occurs without significant prior coordination between the source and the sink. Each block of data is sent by the source, which receives warning of each block by a start bit and notification of the end of the block with a stop bit (also known therefore as start-stop protocol).
Having a variable time interval between successive bits, characters, or events. Each character is individually arranged, usually by using start and stop bits. · Description of the transmission method, or the terminal equipment employed, which is self clocking.
learning mode in which the time of distributing the instruction and the reception of the instruction are different
Not happening at the same time. E-mail is an asynchronous form communication
A type of two-way communication that occurs with a time delay, allowing participants to respond at their own convenience. Literally not synchronous, in other words, not at the same time. Example of an application of asynchronous communication is electronic bulletin board.
No constant rate. Not synchronous. A method of data transmission which allows characters to be sent at irregular intervals by preceding each character with a start bit and following it with a stop bit. The timing of the transmission is not determined by the timing of a previous character. Applications include communication between most small computers and mainframes, lower speed transmissions, and less expensive computer transmission systems.
(Asynchrone): Characterised by not having a constant time interval between successive bits, characters or events. Transmission generally uses one start and one stop bit for character element synchronisation (often called start-stop transmission).
A form of data transmission in which individual characters are sent one at a time delineated by a start bit and a stop bit. Traditionally used for low speed data transmission.
Operations that do not require the clocks of communicating devices to be coordinated. See Synchronous.
A camera characteristic which allows the return to top-of-frame to occur on demand, rather than synchronously following the 60 Hz power line scanning frequency.
As applies to online learning, events in which people are not logged on at the same time. For example, the facilitator/instructor might publish a lecture on a website and learners could read it when their schedules permit. Contrast with synchronous. Close
Relates to electronic communication, where participants send messages to others for reading at another time. Most electronic communication software supports asynchronous communication.
Video and data signals and devices that are not precisely in step, are not of the same frequency, or are not happening together in time.
Students choose when to engage in class activities. Interaction does not take place at a scheduled time, however the teacher may set deadlines. achelor's degree An academic degree awarded after a learner earns a specified number of credits according to the requirements of a college or university degree program. In the United States, that number of credits usually represents four to five years of full-time college or university study.
post commit sends information to all other systems involved in the distribution. Issues:data synchronization and conflict resolutions.
A protocol for communications for most non mainframe and midrange computers where both parties are communicating at the same time.
When a camera system is taking images not synchronized with the framing of a camera, it is often referred to as being asynchronous. This can also mean literally any function or signal when not in sync or unison with a reference signal can be referred to as asynchronous (not in sync).
Transmissions that are not related to timing of the transmission facility; transmission is characterized by individual characters, which are surrounded by start and stop bits. from which a receiver derives its timing.
A data transmission at irregular intervals (without reference to clock signals)
Not synchronous. The most common data transmission method for small computers.
Communication signals that do not rely on a shared timing mechanism to transmit and receive information. Examples are GSM and WCDMA networks.
Occurring independently, but on a similar time scale.
A type of two-way communication, often between teachers and students, or between students in an online class, which occurs with time delay, allowing participants to respond in their own time frame.
Refers to circuitry and operations without a common timing or clock signal.
A form of communication in which there is no mandatory timing between two signals.
Communications between the student and teacher that do not take place simultaneously.
Communication that is not synchronized; that is, not occurring at a fixed time or place. The term asynchronous is usually used to describe communications such as e-mail and bulletin board systems. The opposite is synchronous.
a type of communication between independant devices, distinguished by the lack of a set of strict timing arrangement between them ( some-times called start-stop as seperate signals are included in the data stream to indicate the beginning and end rather than a strictly timed sequence such as synchronous systems) Serial communications between microprocessors, printers and modems are asynchronous)
Data transmission in which the actual data is preceded by a start bit and followed by a stop bit since the time between transmitted characters varies. Compare Synchronous.
pretentious] Any time you like, e.g. watching a rerun on your VCR.
Occurring at different times; for example, discussion or electronic bulletin boards are said to be asynchronous forms of communication because users read and post messages at different times.
A method of transmission in which the time intervals between characters are not required to be equal and signals are sourced from independent clocks with different frequencies and phase relationships. Start and stop bits may be added to coordinate character transfer.
(n.) A method of transmission which does not require a common clock, but separates fields of data by stop and start bits.
(Wireless) Describes serial communication that does not use a receive and transmit synchronizing clock signal to transmit data.