Comtrol AT Command Set Rev A - Manual (Page 53)

AT Commands Reference Manual
100722B Conexant 3-27
&R - RTS/CTS Option
This selects how the modem controls CTS. CTS operation is modified if hardware flow
control is selected (see &K command). The parameter value, if valid, is written to S21 bit
2.
Syntax
&R<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 In sync mode, CTS tracks the state of RTS; the
RTS-to-CTS delay is defined by S26. In async
mode, CTS is normally ON and will turn OFF
only if required by flow control.
1 In sync mode, CTS is always ON (RTS
transitions are ignored). tracks the state of RTS;
In async mode, CTS is normally ON and will
turn OFF only if required by flow control.
Result Codes
OK <value> = 0 or 1.
ERROR Otherwise.
&S - DSR Override
This command selects how the modem will control DSR. The parameter value, if valid, is
written to S21 bit 6.
Syntax
&S<value>
Defined Values
<value> Decimal number corresponding to the selected option.
&0 DSR will remain ON at all times. (Default.)
&1 DSR will become active after answer tone has
been detected and inactive after the carrier has
been lost.
Result Codes
OK <value> = 0 or 1.
ERROR Otherwise.