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Below you will find a reference guide of the AT commands most commonly used in
day-to-day operation of the modem.
Table 8.1: Common AT Commands
Command
Description
Configuration Commands
AT&F
Set all current parameters to manufacturer defaults
AT&V
Display current configuration
AT&W
Stores current configuration to user defined profile
Extended Configuration Settings
AT^SCFG
Example to enable Persistent Context when setting APN:
AT^SCFG=GPRS/PersistentContexts, 1
Sets all current parameters to the user profile stored with AT&W. If a connection is
ATZ
in progress, it will be terminated.
Serial Interface Control Commands
Set fixed local baud rate
The write command specifies the bit rate to be used for the interface. When you
AT+IPR
set a fixed-rate, make sure that both TE (DTE) and TA (DCE) are configured to the
same rate.
Example: AT+IPR=19200 sets the modem baud rate to 19200.
Security Commands
AT+CPIN?
PIN Authentication status. Example response; +CPIN: READY
Identification Commands
Display product identification
Example:
ATI
SIEMENS
TC65
REVISION 02.000
Request International Mobile Equipment Identity (IMEI)
AT+CGSN
This is the module IMEI number located on the top label.
Read own numbers
AT+CNUM
Example response; +CNUM: "My Number", "18052054436", 129
Display SIM card identification number
AT^SCID
Example response; ^SCID: 89014104211640012345
Call Related Commands
ATA
Answer a Call
Mobile originated call to specified number
ATD
ATD<phone number>; for voice call test. Example: ATD15075551234;
ATD<phone number> for data call. Example: ATD15075551234
ATD*99***1#
Establish a GPRS connection by service code 99 and using CID 1.
ATH
Disconnect exsiting connection
Switch from command mode (ie AT commands) to data mode/PPP online mode.
This command is only available during a CSD call or a GPRS connection. The +++
character sequence causes the TA to cancel the data flow over the AT interface
and switch to command mode. This allows you to enter AT commands while
ATO
maintaining the data connection to the remote device or, accordingly, the GPRS
connection. To prevent the +++ escape sequence from being misinterpreted as
data, it must be preceded and followed by a pause of at least 1000 ms. The +++
characters must be entered in quick succession, all within 1000 ms.
+++
Switch from data mode to command mode
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001-0003-829 Revision 1
Page 37 of 65
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