Siemens M1 - Manual (Page 15)

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gsm-m1-e.fm GSM M1 Module, English: A24859-N4000-A100-1-7677
6.3.96
Overview of AT commands
A/ Repeat previous command line
+++ Switch to command mode when connected
ATA Answer call
ATDx Dial the dial string "x"
ATDIx Dial ISDN number "x"
ATDL Redial last telephone number used
ATDS=n Dial stored telephone number
ATE0 Disable command echo
ATE1 Enable command echo
ATH Disconnect existing connection
ATIn Display product data
ATI0 Display product code for GSM module
ATI1 Display software checksum
ATI2 Determine firmware ROM checksum
ATI8 Display supported modes
ATI9 Display device ID
ATO0 Switch from command mode to transparent mode
ATQ0 Display result codes
ATQ1 Do not output result codes to computer
ATSn=x Assign value "x" to S-register "n"
ATSn? Read value of S-register "n"
ATS0=n Go off-hook after n-th ringing signal (n = "1" - "5")
ATS0=0 No automatic answering of calls
ATV0 Display result codes as digits
ATV1 Display result codes as text
ATX0 Display connection without baud rate. Ignore busy signal.
ATX1 Display connection with baud rate. Ignore busy signal.
ATX2 Same as ATX1
ATX3 Same as ATX1 but report BUSY
ATX4 Same as ATX3
ATZn Load user profile "n"
AT&C0 DCD always ON
AT&C1 DCD line ON only in the presence of carrier signal (connection)
AT&D0 Ignore DTR status
AT&D1 At DTR -> OFF: Command mode without going on-hook
AT&D2 At DTR -> OFF: Go on-hook, command mode, auto-answer off
AT&D3 At DTR -> OFF: Go on-hook, factory configuration same as AT&F
AT&F Load factory configuration
AT&T0 Terminate an active test
AT&T1 Initiate local digital test loop
AT&V Display current configuration
AT&Wn Store current configuration as user profile "n"
AT&Yn Load user profile "n" at power-up
General AT commands