User`s manual

U.S. Robotics I-modem Command Reference
Flow Control • Page 10-3
If you use software ßow control and are transferring non-text (binary) Þles or using an
XMODEM
-type protocol, disable ßow control entirely using the &R1 and &I0 commands
described in this section. In addition, set the serial port and connection rates equal using
the &B0 and &N0 commands described in Chapter 7, Controlling Data Rates
.
The start command is called XON (for transmit on) and the stop command is called XOFF
(transmit off). You can change the characters used. See Registers S22 and S23 in Appendix
A, Alphabetic Command Summary. Appendix B includes an ASCII chart, which you may
Þnd helpful when setting the S-Registers.
Received and Transmit Data Flow Control
Received-Data Flow Control
The default ßow control settings are &R2 &I0, which turns hardware ßow control on and
software ßow control off for received data.
&Rn Alter hardware ßow control for received data.