AT Commands F-47
AT Commands
\Q4: Enables unidirectional XON/XOFF flow control. The modem serial port
generates, but does not respond to, XON/XOFF flow control characters. This setting
allows for computers to transmit data that has XON and XOFF data characters. The
computer can still be set to respond to XON/XOFF flow control characters sent to it
from the modem during serial port flow control.
\Q5: Enables unidirectional hardware flow control the same as \Q2, but also keeps CTS
Off until a connection is established.
\Q6: Enables bi-directional hardware flow control the same as \Q3, but also keeps CTS
Off until a connection is established and ignores RTS while not connected.
%R
n Read All Registers
%R0
Displays the contents of all S-registers in decimal and hexadecimal integers in tabular
format.
%R1
Displays the contents of all :Tn registers in decimal and hexadecimal integers in
tabular format.
&R
n RTS/CTS Options
&R0
CTS tracks RTS in synchronous mode.
&R1
CTS ignores RTS in synchronous mode.
&R2
ITU-T V.13 emulates half-duplex over a full duplex line.
Use either &R0 or &R2 to simulate half-duplex synchronous operation. When &R0 is
set, after the register S26 time delay, CTS follows the state of RTS sent from the
computer. When &R1 is set, CTS remains On for the duration of the connection.
NOTES
•
The modem ignores &R during asynchronous connections.
•
Refer to the register :T15 description for details on RTS/CTS.
