User`s manual

U.S. Robotics I-modem Command Reference
Appendix A: Alphabetic Command Summary • Page A-15
&F1 Load Hardware Flow Control template settings.
&F2 Load Software Flow Control template settings.
&Gn Set guard tones for international calls.
&G0 No guard tone. Use this in the United States and Canada.
&G1 This sets a 550 Hz guard tone, and is used in some European countries.
&G2 This sets an 1800 Hz guard tone, and is used in the U.K. and some Com-
monwealth countries. &G2 requires the B0 setting.
&Hn Transmit data ßow control. Prevents the I-modemÕs buffer for data transmitted to
the I-modem by its attached com-puter from overßowing.
&H0 Disable transmit data ßow control.
&H1 Use hardware ßow control. Requires that your computer and software sup-
port Clear to Send (CTS) at the EIA-232 interface.