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The abbreviation is usually given together with the line speed in bits per second, as in "9600–8-N-1". The speed (or baud rate) includes bits for framing (stop bits, parity, etc.), thus the effective data rate is lower than the baud rate. For 8-N-1 encoding, only 80% of the bits are available for data (for every eight bits of data, ten bits ...
The ratio is not necessarily an integer; in 4B3T coding, the bit rate is 4 / 3 of the baud rate. (A typical basic rate interface with a 160 kbit/s raw data rate operates at 120 kBd.) Codes with many symbols, and thus a bit rate higher than the symbol rate, are most useful on channels such as telephone lines with a limited bandwidth but ...
This is a list of interface bit rates, is a measure of information transfer rates, or digital bandwidth capacity, ... Modem 9600 (2400 baud; V.32)
Automatic baud rate detection (ABR, autobaud) refers to the process by which a receiving device (such as a modem) determines the speed, code level, start bit, and stop bits of incoming data by examining the first character, usually a preselected sign-on character on a UART connection. ABR allows the receiving device to accept data from a ...
UART clock allows integer division to common baud rates up to 7,200(×16×125) or 14,400(×8×125). Also a reference clock for PDC clock. Reference clock of some consumer GPS receivers. [19] 14.7456 921600 UART clock allows integer division to common baud rates up to 921,600(×16×1); common clock for small microcontrollers 14.750 SDTV
For this reason, the baud rate value will often be lower than the gross bit rate. Example of use and misuse of "baud rate": It is correct to write "the baud rate of my COM port is 9,600" if we mean that the bit rate is 9,600 bit/s, since there is one bit per symbol in this case. It is not correct to write "the baud rate of Ethernet is 100 ...
9600 bit/s will deliver a character approximately every millisecond, so a 1-byte FIFO should be sufficient at this rate on a DOS system which meets the maximum interrupt disable timing. Rates above this may receive a new character before the old one has been fetched, and thus the old character will be lost.
The 16550A(F) version was a must-have to use modems with a data transmit rate of 9600 baud. Dropouts occurred with 14.4 kbit/s (V.32bis and higher) units and as compression was added with V.42 getting more data per interrupt was critical as data speed continued to increase.