User manual

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CHAPTER 5
APPENDIX
5.1 Factory settings
The modem has the following factory settings. Please refer to the AT command document for the
meaning of each setting.
Related AT commands Factory Settings Description
AT+IPR 9600 DTE-DCE data rate
AT+IFC 2,2 DTE-DCE flow control
AT+ICF 3,4 DTE-DCE character framing
ATE 1 ECHO
AT&C 1 DCD signal
AT&D 1 DTR signal
ATQ 0 Result code suppression
ATV 1 Response format
AT&S 1 DSR signal
ATS0 0 Auto answer
AT+CLIP 0 Calling line ID presentation
AT+CRLP Calling line ID restriction
AT+CSCS “PCCP437”
AT+CMGF 1 Message format
AT+CSMP 1,67,0,0 Text mode parameters
AT+CNMI 0,0,0,0 New message indication
5.2 Input / Output port
This port can be configured as either an input one or an output one.
To configure it as an input port, first issue AT+WIOW=2, 0 to disable the output port. Use
AT+WIOR=3(Maestro 100) or AT+WIOR=1(Maestro 20) to read the status of this input port. Response
+WIOR: 0 represent Logic HIGH (>3V); Response +WIOR: 1 represent Logic LOW (<0.5V) To use it as
an output port, issue AT+WIOW=2,1 will turn it on and it will drain current to ground. The current is
recommended not to exceed 10 mA. Issue AT+WIOW=2,0 will turn it off.
5.3 RS232 AUTO-ONLINE mode (power saving)
When being in the AUTO-ONLINE, the RS232 transceiver will shutdown most of its hardware to save
power if it does not detect a valid input for more than 100uS. The RS232 transceiver will wake up when
valid input is detected again.
By default, the RS232 transceiver is put in AUTO-ONLINE. This mode can be turned off by issuing
AT+WIOW=4,1.