Specifications

Chapter 11 – GPRS Commands
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371B) 160
11.13 AT+CGSMS Select Service for MO SMS
Messages
Description: The test command is used for requesting information on which services and service preferences
can be set by using the AT+CGSMS write command.
The read command returns the currently selected service or service preference.
The write command is used to specify the service or service preference that the MT will use to
send MO SMS messages. If parameter <service> is not given, the current value remains
unchanged.
Test Command Syntax: AT+CGSMS=?
Response: +CGSMS: (list of supported <service>s)
OK
Read Command Syntax: AT+CGSMS?
Response: +CGSMS: <service>
OK
Write Command Syntax: AT+CGSMS=[<service>]
Response: OK
ERROR
+CME ERROR
Parameter Descriptions:
<service>
A numeric parameter which indicates the service or service preference to be used. The parameter is global for all
interfaces and is volatile.
0 GPRS
1 Circuit switched
2 GPRS prefered (use circuit-switched SMS transfer if GPRS SMS transfer is not possible;
for example, when the mobile is not GPRS attached or the network does not support SMS
over GPRS).
3 Circuit switched preferred (use GPRS if circuit switched is not available). Default.
Notes:
• Sending SMS via GPRS is only possible when mobile is attached using AT+CGATT.