Siemens 7SG11 Manual page 126

7SG11 Argus Technical Reference
A number of bits containing the data. Sent after the start bit.
Half-Duplex Asynchronous Communications
Communications in two directions, but only one at a time.
Hayes 'AT'
Modem command set developed by Hayes Microcomputer products, Inc.
Modem
MOdulator / DEModulator device for connecting computer equipment to a telephone line.
Parity
Method of error checking by counting the value of the bits in a sequence, and adding a parity bit to make the
outcome, for example, even.
Parity Bit
Bit used for implementing parity checking. Sent after the data bits.
RS232C
Serial Communications Standard. Electronic Industries Association Recommended Standard Number 232,
Revision C.
Start Bit
Bit (logical 0) sent to signify the start of a byte during data transmission.
Stop Bit
Bit (logical 1) sent to signify the end of a byte during data transmission.
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