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MultiMobile SoftGSM User Guide
MTSGSM
30
Introduction
This chapter describes all of the AT commands, S-Registers and Result Codes supported by
MultiMobile SoftGSM. This information is also available at the MultiMobile SoftGSM website at
http://
www.softgsm.com.
International Modem Restrictions
Some dialing and answering defaults and restrictions may vary for international modems. Changing
settings may cause a modem to become non-compliant with national telecom requirements in
specific countries. Also note that some software packages may have features or lack restrictions that
may cause the modem to become non-compliant.
Standard AT Commands
AT Attention
Syntax AT
Description Used to see if modem is responding. Just returns OK.
A Answer incoming call
Syntax ATA
Description The ATA command is used to make the modem answer an incoming call. If there is
no incoming call, the command will return OK and do nothing.
D Dial number
Syntax ATDn where n is the number to be dialed.
Description The ATD command is used to make an outgoing call. The number specified is dialed
and the modem tries to establish a connection. For a GSM-call the area code must
always be included in the number to be dialed.
DTn Dial number (tone dialing)
Syntax ATDTn where n is the number to be tone dialed.
Description The ATDT command is used to make an outgoing call. The number specified is tone
dialed and the modem tries to establish a connection. For a GSM-call, the area code
must always be included in the number to be dialed.
DPn Dial number (pulse dialing)
Syntax ATDPn where n is the number to be tone dialed.
Description The ATDP command is used to make an outgoing call. The number specified is pulse
dialed and the modem tries to establish a connection. For a GSM-call, the area code
must always be included in the number to be dialed.
H Hang up
Syntax ATH
Description The ATH command hangs up an ongoing call.
ATI Identify Modem
Syntax ATIn where n is as follows
Description The ATI command is used to show information about the modem
ATI0 Displays modem Manufacturer, Product name
ATI2 Displays coderevision of modem software
ATI3 Displays coderevision of modem software
ATI9 Displays modem Manufacturer, Product name