4 AT Commands for Call Control
4.1 AT+CSTA Select type of address
Description
Write command is used to select the type of number for further dialing commands (AT D) according
to GSM/UMTS specifications.
Read command returns the current type of number.
Test command returns values supported by the Module as a compound value.
SIM PIN References
YES 3GPP TS 27.007
Syntax
Test Command Responses
AT+CSTA=? +CSTA:(list of supported <type>s)
OK
Read Command Responses
AT+CSTA? +CSTA:<type>
OK
Write Command Responses
OK AT+CSTA=<type>
ERROR
Defined values
<type>
Type of address octet in integer format:
145 – when dialling string includes international access code character “+”
161 – national number.The network support for this type is optional
177 – network specific number,ISDN format
129 – otherwise
Others – reserved
NOTE: Because the type of address is automatically detected on the dial string of dialing
command, command AT +C STA has really no effect.
Examples
AT+CSTA?
+CSTA: 129
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