Specifications

AT command set for XX Siemens mobile phones and modems
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Document No.: A30880-A10-A001-XX-
D376
Revision: Master R75
Revision Date: 29. September, 2004
12
2.2 The AT command set
GSM mobile telephones and modems can be operated via Remote Control using a serial interface (data cable or
infrared connection). Remote control is implemented by means of AT+C commands according to the 3GPP TS
27.007 [15] and 3GPP TS 27.005 [14] specifications, as well as several manufacturer-specific AT commands.
These commands are described in more detail in section 2.2.4.
A command entered at the user port generally begins with an ‘AT’ command prefix. The remainder of the line is
interpreted as a sequence of the commands described below. The commands are not case-sensitive. More than
one command may be given on a single line, with the semicolon serving as the delimiter between commands.
The “V.250” specification [16] applies to the sequence of the interface commands. According to this guideline,
commands should begin with the character string ”AT” and end with ”<CR>” (= 0x0D). The input of a
command is acknowledged by the display of ”OK” or ”ERROR”.
2.2.1 Commands that can be executed without the PIN
The following commands can be executed without entering the PIN:
AT&C
AT&D
AT&F
AT&V
AT^SACD
AT^SADT
AT^SAPO
AT^SQWE
AT^SCCM
AT^SCKA
AT^SCKS
AT^SDLY
AT^SFCB
AT^SFLG
AT^SGAUTH
AT^SIFS
AT^SKPD
AT^SLCK
AT^SMSO
AT^SOBX
AT^SPIC
AT^SPST
AT^SPWD
AT^SQWE
AT^SRMP
AT^STRC
AT^SVMC
AT^S_MI
AT^S_PM
AT+CALM
AT+CBC
AT+CCLK
AT+CGMI
AT+CGMR
AT+CGMM
AT+CGSN
AT+CIND
AT+CKPD
AT+CLCK
AT+CLVL
AT+CMEC
AT+CMEE
AT+CEER
AT+CMUT
AT+CPAS
AT+CPIN
AT+CPWD
AT+CREG
AT+CRMP
AT+CRSL
AT+CSCS
AT+CSQ
AT+CTZR
AT+CVIB
AT+GCAP
AT+GMI
AT+GMM
AT+GMR
AT+GSN
AT+IPR
AT+VTD
AT+WS46
ATA
ATD
ATE
ATH
ATI
ATO
ATQ
ATS0..7
ATV
ATX
ATZ
AT\Q
2.2.2 Commands that can be interrupted
A command currently in process is interrupted by each additional character entered. This means that you should
not enter the next command until you have received the acknowledgment; otherwise the current command is
interrupted. The following commands can be interrupted:
AT^SBNR
AT^SBNW
AT^SDBR
AT^SKPD
AT^SMGL
AT^SMGR
AT^SPLM
AT^SPLR
AT^SPLW
AT^SSTK
AT^SVMC
AT+CGACT