Definitions for "Asynchronous Transmission"
Related Terms:
Stop bit, Synchronous transmission, Stop bits, Start bit, Asynchronous communications, Serial transmission, Asynchronous, Synchronous communications, Parallel transmission, Asynchronous mode, Synchronous, Half duplex, Bit stuffing, Preamble, Line turnaround, Full duplex, Stm, Half-duplex, Duplex , Asynchronous protocol, Full-duplex, Half-duplex transmission, Time division multiplexing, Bit stream, Timeslot, Isochronous, Duplex transmission, Asynchronous communication, Burst, Burst mode, Synchronous digital hierarchy, Time-division multiplexing, Dsss, B8zs, Stm-1, Simplex, Time slot, Bursty, Serial, Sts-1, Inverse multiplexing, Data bits, Inverse multiplexer, Sdh, Tdm, Bsc, Parallel, Data communication, Clocking
The method whereby data is sent and received one byte at a time.
Data transmission technique controlled by stop & start bits. Sending & receiving DTE's are not synchronized throughout the transmission.
One of two transmission modes in which each byte is marked with a start bit and a stop bit. Because this method results in lower communication speeds, telephone lines use asynchronous communication.
This form of transmission is like sending packages through the mail with a address and a return address. Each character of data is a self-contained package with its own start and stop bits. In contrast to synchronous transmission, asynchronous transmission sends data without special timing information and the start and stop bits tell hardware and software that an entire character has been received. Asynchronous is the common form of transmission between modem and computer.
A timing independent method of electrical transfer of data in which the sending and receiving units are synchronized on each character, or small block of characters, usually by the use of start and stop signals. Contrast with synchronous transmission.
(1) Mode of data communications transmission in which time intervals between transmitted characters may be of unequal length. (2) Transmission independently controlled by start and stop elements at the end of each character. Synonym: start-stop transmission.
The bit-serial transmission of signs.
This is a method of data transmission that allows characters to be sent irregular intervals.
Data transmission in which each information character, or sometimes each word or small block, is individually synchronized, usually with start or stop elements (for example, bits). The gap between each character or word is not a fixed length.
Transmission in which time intervals between transmitted bits may be of unequal length. Transmission is controlled by start and stop bits which frame each character.
Each byte of information is synchronized individually through the use of request and acknowledge signals.
Transmission in which the intervals between transmitted characters are of unequal length. Transmission is controlled by start and stop elements.
Random start and stop of data which requires special start and stop information embedded in the data flow.
A method of transmission that doesn't require timing information in addition to data. The beginnings and ends of characters, or blocks of characters, are indicated by start and stop bits.
A mode of communication characterized by start/stop transmissions with undefined time intervals between transmissions.
A form of serial communications where each transmitted character is bracketed with a start bit and one or two stop bits. The alarm card provides asynchronous EIA-232 capabilities.
Transmission in which time intervals between transmitted characters may be of unequal length. Transmission is controlled by start and stop elements at the beginning and end of each character. Also called start/stop transmission. Compare with: synchronous transmission.
Data transmission in which transmission of a character or block of characters can begin at any time, but in which the bits that represent the character or block have equal time duration. Contrast with synchronous transmission. See also start-stop.
Digital signals are transmitted without precise clocking. The signals have different frequencies and phase relationships. Individual characters contained in control bits (start and stop bits) designate the beginning and end of each character.
A mode in which the sending and receiving serial hosts know where a character begins and ends because each byte is framed with additional bits, called a start bit and a stop bit. A start bit indicates the beginning of a new character; it is always 0 (zero). A stop bit marks the end of the character. 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.
In modem communication, a form of transmission in which data is sent intermittently, one character at a time, rather than as a steady stream with characters separated by fixed time intervals.
A data coding structure where each character transmitted is preceded by a start signal and followed by a stop signal. The receiver is switched on by the start signal and switched off by the stop signal, ready to receive the next character. Intervals between characters vary.
Data transmission of one character at a time to the receiving device, with intervals of varying lengths between transmittals.
A transmission in which each information character, or sometimes each word or small block, is individually synchronized, usually by the use of start and stop elements. Also called start-stop transmission.
Data transmission in which each information character or byte is individually synchronized, usually by the use of start or stop elements.
A mode of data transmission whereby each bit of information is generated separately with some stop/start code to indicate the interval between bits.
Transmission in which information character, or sometimes each word or small block, is individually synchronised, usually by the use of start and stop elements. The gap between each character (or word) is not of a necessarily fixed length.
Transmission in which the length of time between transmitted characters may vary. Because the time lapses between transmitted characters are not uniform, the receiving modem must be signaled as to when the data bits of a character begin and when they end. The addition of Start and Stop bits to each character serves this purpose. Compare to Synchronous Transmission.
A scheme in which data characters are sent at random time intervals. Limits phone-line transmission to about 2,400 baud (bps). See Synchronous Transmission.
The transmission of data in which each character is a self-contained unit with its own start and stop bits. Intervals between characters may be uneven. It is the common method of transmission between a computer and a modem, although the modem may switch to synchronous transmission to communicate with the other modem. Also called "start/stop transmission."
A data transmission scheme that handles data on a character-by-character basis without clock synchronisation. The character code normally includes a start bit which indicates the beginning of a data character, 5-8 data bits, an optional parity bit and one, one-and-a-half or two stop bits.
A transmission method that sends units of data one character at a time. Characters are preceded by start bits and followed by stop bits, which provide synchronization at the receive terminal. Also called start-stop transmission.
In data transmission, each character is individually synchronized, usually by start bits and stop bits. Timing information is usually included in the transmitted character.
A protocol in which data are transmitted at irregular intervals on an as-needed basis. (See also synchronous transmission.)
With asynchronous modems, data is transmitted in a serial stream, one character at a time. Each transmitted character consists of a number of data bits (the character) preceded by a start bit, ending in an optional parity bit, and followed by a stop bit. Both the sending and receiving devices must agree on the start and stop bit sequence. Communication is not synchronized. There is no clocking device or method to coordinate transmission between the sender and receiver, therefore start and stop bits are required. This is a much slower, more inefficient method than synchronous transmission because all the start/stop bits take up space that could be used to transmit more data. See also Synchronous transmission.