Cabletron Systems CSMIM-T1 Installation Manual page 158

Chapter 7: AT Commands and Registers
\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 :T registers in decimal and
hexadecimal integers in tabular format.
&R n
RTS/CTS Options
&R2 ITU-T V.13 emulates half-duplex over a full duplex line.
Use &R2 to simulate half-duplex operation.
The modem ignores &R during asynchronous connections.
NOTE
S n ? Read Configuration Registers
Where n is an integer from 0 to 27, indicating a register, displays
the contents in decimal form of the selected register.
&S n DSR Options
&S0 DSR always on.
&S1 DSR complies with ITU-T recommendations.
Controls the Data Set Ready (DSR) signal on the serial port.
7-32 CSMIM-T1 Hardware Installation Guide