Specifications

Chapter 8 – Communication Commands
Multi-Tech Systems, Inc. CDMA C1 AT Commands Reference Guide 29
Values: <Tx>
0 None Transmit data flow control disabled.
1 XON/XOFF Not Supported. Remove Xon (0x19) and Xoff (0x17) characters
from data stream.
2 Hardware Use RTS (Request To Send) signal (default)
3 XON/XOFF Not Supported. Leave Xon (0x19) and Xoff (0x17) characters in
data stream.
<Rx>
0 None Receive data flow control disabled.
1 XON/XOFF Not Supported. Remove Xon (0x19) and Xoff (0x17) characters
from data stream.
2 Hardware Use CTS (Clear To Send) signal (default)
Set DCD Signal &C
Description: This command is used to specify the behavior of the Data Carrier Detect (DCD) signal on the
modem DATA port. The factory default value is 2. The AT&F command restores the value to the
factory setting.
Syntax: AT&C<n>
Command
Possible Responses
AT&C0
Note: DCD always on
OK
Note: Command valid
AT&C1
Note: DCD matches the true state of the call.
OK
Note: Command valid
AT&C2
Note: Wink DCD signal on call disconnect
OK
Note: Command valid
Values: <n>
0 The DCD signal is always asserted.
1 The DCD signal is asserted in a call and de-asserted when not in a call.
2 The DCD signal is always asserted except at the end of a call. At the end of a call,
the DCD signal is de-asserted for 1 second. Default is 2
Set DTR Signal &D
Description: This command controls the interpretation of the Data Terminal Ready (DTR) signal on the
modem DATA port. The factory default value is 2. The AT&F command restores the value to the
factory default.
Syntax: AT&D<n>
Command
Possible Responses
AT&D0
Note: The DTR signal is ignored
OK
Note: Command valid
AT&D1
Note: Enter online command state following
circuit 108/2 ON-to-OFF transition
OK
Note: Command valid
AT&D2
Note: Enter command state following circuit
108/2 ON-to-OFF transition
OK
Note: Command valid