User`s manual

U.S. Robotics I-modem Command Reference
Glossary • Page G-49
X
XMODEM
The Þrst of a family of error-control software protocols used to transfer Þles between
modems. These protocols are in the public domain and are available from many bulletin
board services.
XON/XOFF
Standard ASCII control characters used to tell a device to stop/resume transmitting data.
In most systems typing <Ctrl>-S sends the XOFF character. Some devices, including the
Courier, understand <Ctrl>-Q as XON; others interpret the pressing of any key after
<Ctrl>-S as XON.
Y
YMODEM
An error-correcting File Transfer Protocol that is related to, but faster than, XMODEM.