Comtrol AT Commands for SmartACFL - Manual (Page 41)

Command Reference Manual
100722A Conexant 3-21
3.2.2.12 &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.
3.2.2.13 &X - Select Synchronous Clock Source
Selects the source of the transmit clock for the synchronous mode of operation. The parameter value, if valid, is written to
S27 bits 4 and 5.
In asynchronous mode, the transmit and receive clocks are turned OFF. In synchronous mode, the clocks are turned ON with
the frequency of 1200 Hz or faster corresponding to the speed that is selected for modem operation.
Syntax
&X<value>
Defined Values
<value> Decimal number corresponding to the selected option.
0 Selects internal timing. The modem generates the transmit clock signal and
applies it to the TXCLK output at the serial interface.
1 Selects external timing. The local DTE sources the transmit clock signal on the
XTCLK input of the serial interface. The modem applies this clock to the TXCLK
output at the serial interface.
2 Selects slave receive timing. The modem derives the transmit clock signal from the
incoming carrier and applies it to the TXCLK output at the serial interface.
Result Codes
OK <value> = 0 to 2.
ERROR Otherwise.