Multi-Tech Systems MMCModem GPRS (MTMMC-G) - Manual (Page 159)

Chapter 15 – GPRS Commands
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 159
Select Service for MO SMS Messages +CGSMS
Description: The set command specifies the service or service preference that the modem will use to send MO SMS
messages.
The read command returns the currently selected service or service preference.
The test command requests information on the currently available services and service preferences.
Values: : a numeric parameter which indicates the service or service preference to be used
0 GPRS
1 Circuit switched
2 GPRS preferred (use circuit switched if GPRS is not available)
3 Circuit switched preferred (use GPRS if circuit switched not available)
Other values are reserved and will result in an ERROR response to the set command.
Syntax: Command Syntax:
Command Possible Responses
AT+CGSMS= [] OK
ERROR
At+CGSMS? +CGSMS:
OK
AT+CGSMS=? +CGSMS: (list of currently available
s)
OK
AT +CGSMS=0 OK
AT+CGSMS=? +CGSMS=(0-3)
OK