Digicom pocket GSM User Manual page 17

PocketGSM
Attention: check with your telephone operator if your SIM is enabled for DATA and eventually for FAX.
In fact most SIMs are enabled for Voice(call and reception) while for DATA and FAX only the call is
enabled.
To enable the reception of DATA and FAX traffic it is necessary to ask the telephone operator that
will assign two additional numbers (one to receive DATA calls and one to receive FAX calls).
Examples:
Command: AT+CBST=7,0,1
Answer: OK
Command: ATD0123456789
Answer: CONNECT 9600
Command: AT+CBST=71,0,1
Answer: OK
Command: ATD0123456789
Answer: CONNECT 9600
DATA calls reception
Generally in PocketGSM the automatic answer is disabled (S0=0): in this case the modem
will answer only after it received the ATA command.
In case you want to enable the automatic answer, you must set the S0 register with the
number of rings after which to answer (eg. S0=2 automatic answer after two rings).
PocketGSM factory configuration has the AT+CBST=0,0,1 setting, in this way it will be
able to answer to any call coming from an analog, ISDN or GSM modem.
[ For further information see the chapter "AT Commands" present in the user's manual on Digicom
website ]
E) SMS MANAGEMENT (TEXT mode)
PocketGSM manages the SMS in TEXT and PDU format.
Send an SMS (TEXT mode)
You find here the necessary commands to send SMS in TEXT mode.
V.32 call at 9600bit/s
V.110 call at 9600bit/s
3.5
Functional Examples