Specifications

Chapter 8 – Communication Commands
30 Multi-Tech Systems, Inc. CDMA C1 AT Commands Reference Guide
Values: <n>
0 The DTR signal is ignored.
1 Enter online command state following ON-to-OFF transition of circuit 108/2. Data call
remains active.
2 Enter AT command state following ON-to-OFF transition of circuit 108/2. Data call is
terminated. (Default)
Note: All open sockets are automatically closed prior to terminating the data call.
Set DSR Signal &S
Description: This commands controls the Data Set Ready (DSR) signal on the modem DATA port. The default
value is 0. The AT&F command restores the value to the factory default setting.
Syntax: AT&S<n>
Command
Possible Responses
AT&S0
Note: The DSR signal always on.
OK
Note: Command valid
AT&S1
Note: The DSR signal is always off.
OK
Note: Command valid
Values: <n>
0 The DSR signal is always on. (Default)
1 The DSR signal is always off.
V.42bis Data Compression +DS
Description: This command enables or disables V.42bis data compression if this feature is provided on the
PSTN in the IWF.
Syntax: AT+DS=<dir>,<neg>,<P1>,<P2>
Command
Possible Responses
AT+DS=0,0,2048,6
Note: Set new parameters
OK
Note: Command valid
AT+DS?
Note: Current values
+DS: 0,0,2048,6
OK
Note: Command valid
Values: Four numeric sub-parameters are accepted:
<dir> Specifies the desired direction(s) of operation of the data compression function;
from the DTE point of view.
0 Negotiated … no compression Default.
1 Transmit only
2 Receive only
3 Both directions, accept any direction
<neg> Specifies whether or not the DCE should continue to operate if the desired
result is not obtained.
0 Do not disconnect if V.42 bis is not negotiated by the remote DCE as specified in
<dir> Default.