3Com 56K Command Reference Manual page 154

B-6 A B: A
PPENDIX LPHABETIC
C S
OMMAND UMMARY
Command Function
&C1
&Dn Control how the modem responds to Data Terminal Ready (DTR)
signals.
&D0
&D1
&D2
&D2S13=1
&Fn Load one of the three configuration templates that are stored
permanently in read-only memory. Appendix C, Flow Control
Templates, lists the settings for each template.
To load a template into current memory, enter AT&Fn. To write
a template to NVRAM, enter AT&Fn&W.
&F0 is always loaded into memory at power-on or when the
RESET button is pressed.
&F0
&F1
&F2
&Gn Set guard tones for international calls.
&G0
&G1
&G2
&Hn Transmit data flow control. Prevents the modem's buffer for
data transmitted to the modem by its attached computer from
overflowing.
&H0
Normal operations. The modem sends a CD signal
when it connects with another modem and drops
the CD when it disconnects.
DTR is always ON (ignored).
If issued before connecting with another device,
the Business Modem can enter online Command
mode during a call by dropping DTR.
&D1 functions similarly to the escape code (+++).
Return online with the On command, or hang up
with the Hn command.
Normal DTR operations. The modem will not
accept commands unless your computer sends a
DTR signal. Dropping DTR ends a call.
Modem resets with DTR toggle
Load No Flow Control template settings.
Load Hardware Flow Control template settings.
Load Software Flow Control template settings.
No guard tone. Use this in the United States and
Canada.
This sets a 550 Hz guard tone, and is used in some
European countries.
This sets an 1800 Hz guard tone, and is used in
the U.K. and some Commonwealth countries.
&G2 requires the B0 setting.
Disable transmit data flow control.