AT Commands User Manual 6 Call Control Commands Note: Because the type of address is automatically detected on the dial string of the D command, the +CSTA command has really no effect . may be: − 145 when dialing string includes international access code character “+”. − 129 when the dial string begins with a digit. 6.2 Dial command D 6.2.1 Description The V.24ter dial command D lists characters that may be used in a dialing string for making a call or controlling supplementary services in accordance with GSM02.30 and initiates the indicated kind of call. No further commands may follow in the command line. The command is abortable by hit a key before establishment.
6.2.2 V.25ter dialing digits They are: 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, *,#, +, A, B, C. Character D is allowed but ignored. 6.2.3 V.25ter or GSM modifier characters − “,”, “T”, “P”, “!”, “W” or “@” are ignored. − “;” forces a voice call originated to the given address. − “>” allows direct dialling from phonebook. − “I” invocation restrict CLI presentation. − “i” suppression i.e. allows CLI presentation. − “G” or “g” control the CUG supplementary service information for this call (s.+CCUG). 6.2.4 Direct calling from phonebooks D > [I][G][;] originate a call to phone number which corresponding alphanumeric field in the default phonebook is .
D >mem [I][G][;] originate a call to phone number in memory (one of the phonebooks) “mem” entry location . ”mem” may be for example “SM”, “FD” or “LD”. D > [I][G][;] originate a call to phone number in entry location of the default phonebook. The semicolon character shall be added when a voice call is originated. CLIR and CUG per call modifiers can also be present. 21 6.1 Select type of address +CSTA Command syntax Description AT+CSTA=[ ] AT+CSTA=[ ] This set command selects the type of number for further dialing commands (D) according to GSM specifications. Read command +CSTA: OK AT+CSTA? Test command +CSTA: (129,145) OK AT+CSTA=?