001-0003-829 Revision 1
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Identification Commands
The AT Commands described in this section allow the external application to obtain various
identification information related to the modem and linked entities.
Table 9.7: Identification Commands
Command Description
ATI
The execute command delivers product information text.
The 'Revision' information consists of the following parts: Version xx and variant
yy of software release.
AT+CGMI
Request manufacturer identification (GSM 07.07)
AT+GMI Request
manufacturer identification (V.250)
AT+CGMM
Request model identification (GSM 07.07)
AT+GMM
Request model identification (V.250)
AT+CGMR
Request revision identification of software status (GSM 07.07)
AT+GMR
Request revision identification of software status (V.250)
AT+CGSN
Request International Mobile Equipment Identity (IMEI) (GSM 07.07)
AT+GSN
Request International Mobile Equipment Identity (IMEI) (V.250)
AT+CIMI
Request International Mobile Subscriber Identity (IMSI) (GSM 07.07)
Call Related Commands
The AT Commands described in this section are related to Mobile Originated (MOC, i.e. outgoing)
Calls and Mobile Terminated (MTC, i.e. incoming) Calls.
Table 9.8: Call Related Commands
Command Description
ATA
Answer a call:
TA causes remote station to go off-hook (e.g. answer call).
ATD
Mobile originated call to specified number:
This command can be used to set up outgoing voice, data or fax calls.
ATD<n><mgsm>
n:
String of dialing digits and optional V.250 modifiers: 0-9, *, #, +, A, B, C The
following V.250 modifiers are ignored: ,(comma), T, P, !, W ,@ Emergency call :
<n> = 112, 911 or 08, standardized GSM emergency number (no SIM needed).
mgsm(optional):
String of GSM modifiers:
I - Activates CLIR (disables presentation of own phone number to called party)
i - Deactivates CLIR (enables presentation of own phone number to called party)
G - Activate Closed User Group explicit invocation for this call only.
g - Deactivate Closed User Group explicit invocation for this call only.
ATDI
Mobile originated call to ISDN number:
ISDN number: String with maximum length of 20 characters. Allowed
characters: +, 0-9, A, B, C.
ATDL
Redial last number used in the ATD command.
ATH Disconnect
existing
connection
AT+CHUP
Cancels all active and held calls. (Hang up call)
AT+SHUP
Hang up call(s) indicating a specific GSM04.08 release cause.
ATS0
Set number of rings before automatically answering a call:
=000 Automatic answer mode is disabled.
=001-255 Enable automatic answering after specified number of rings.
ATS6
Set pause before blind dialing:
=000 to 255
