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AT Command Set and S-Registers
Table 4-1. AT Command Reference (8 of 18)
AT
Command Description
\G n
MODEM-TO-MODEM FLOW CONTROL
In normal mode (set by the \N0 command or after fallback),
this command enables modem-to-modem flow control using
XOFF and XON characters to stop and start transmission
between modems, respectively.
For more information on flow control, refer to the \Q and \X
commands. Flow control is also described in Appendix E,
Advanced Modem Concepts , starting on page E-4.
\G0
\G1
\K n
SET BREAK CONTROL
This command defines what action the modem takes when
a break (Attention signal) is sent or received, as described
below.
NOTE: Using this command is not recommended unless
your communications software supports the Break character
and your application requires you to send or receive break
signals.
This command controls three different actions the modem
may take when sending or receiving a break signal.
First, the command controls what is sent from the modem
first, any data which may be in the buffer, or the received
break. (When the break is sent first, this is sometimes
referred to as "expedited" mode.)
Second, the command controls whether or not any data in
the buffer is sent or discarded when the computer sends a
break. (When the data is discarded, this is sometimes
referred to as "destructive" mode.)
Third, the command determines whether or not the modem
enters Command mode when it receives a break from the
computer.
\K0
\K1
\K2
\K3
\K4
\K5
Disables modem-to-modem flow control.
Sets flow control to XON/XOFF.
Send
Send
Data First?
Data?
no
no
no
no
no
yes
no
yes
yes
yes
yes
yes
Enter
Command mode?
yes
no
yes
no
yes
no
Issue 2
May 1995
4-9
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