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Chapter 5: Configuration
Table 5-3. Serial Interface Commands.
Command
Command Name
Description
&Cn
Data Carrier Detect
(DCD)
Controls the module’s DCD output signal to the attached device. Determines
when the DCD line is active.
Values:
0 DCD always on
1 DCD on when modems synchronized*
2 DCD used for output data framing and Modbus mode
*DCD always on when module configured as a Master
&Dn
Data Terminal Ready
(DTR)
Controls the action that the module will perform when the DTR input line’s state
is modified.
Values:
0 DTR ignored
2 deassert DTR to force module into Command mode (at serial baud rate set by
S102); DTR must be reasserted before putting module back into data mode
(normally done using the ATA command).
&Kn
Handshaking
Enables or disables hardware handshaking.
Values:
0 handshaking disabled
3 RTS/CTS handshaking enabled
NOTE: Software flow control (XON/XOFF) is not supported.
&Sn
Data Set Ready (DSR)
Controls the module’s DSR line and determines when it is active.
Values:
0 DSR always on
1 ON in Data mode, OFF in Command mode
2 DTR/DSR signaling: Remotes output state of Master’s DTR on their local DSR
line in PMP network. Master only outputs state of Slave’s DTR on its local DSR
line in PTP. Not supported in P2P or E2E network.
