Lava PAYLINK-IP/232, Руководство по настройке

Страница: 15 / 27

Rev. A07 PayLink-IP/232 Configuration Guide Page 14 of 26
9. Glossary
ACK. ACKnowledge character (HEX 06). A flow control character send from a receiver of a transmission to the sender of
the transmission to indicate data has been received.
CRC. Cyclic Redundancy Check. An error-checking method that computes a value based on a block of data to be trans-
mitted. The data and the computed value are then transmitted together. The receiver checks the CRC value against the
data block to ensure the transmission was not corrupted.
DLE. Data Link Escape character (HEX 10). A transmission control character used to modify the meaning of characters
immediately following it.
ENQ. ENQuire character (HEX 05). A flow control/poll character used to enquire whether a remote device is ready for
communication.
EOT. End Of Transmission character (HEX 04). A flow control character used to indicate a cessation of communication
between a sender and a receiver.
ETX. End of TeXt character (HEX 03). A flow control character used to delimit the end of a data block or frame.
LRC. Longitudinal Redundancy Check. An error-checking method that computes a parity value based on a block of
data.
LSB. Least Significant Bit. The least significant bit is the lowest bit in a series of numbers in a binary number’s represen-
tation. The LSB is located at the far right of a string.
MSB. Most Significant Bit. The most significant bit is the highest bit in a series of numbers in a binary number’s repre-
sentation. The MSB is located at the far left of a string.
STX. Start of TeXt character (HEX 02). A flow control character used to delimit the start of a data block or frame.
SYN. SYNchronize character. A flow control character sometimes used as part of a setup string in terminal-server nego-
tiation.