AT COMMAND INTERFACE
The Navtalk GSM supports the following AT commands. They correspond to the commands of AT Hayes-
compatible modems applicable for GSM 07.07.
Overview
Command
Description
A/
Re-issues last AT command given
+++AT
ESC from Data mode to command mode
ATA
Answer incoming call
ATD
Mobile Originated call to dialable number
ATD><MEM><N>
Originate call to phone number in memory <MEM>
ATD><N>
Originate call to phone number in current memory
ATDL
Redial last telephone number used
ATE
Set command echo mode
ATH
Disconnect existing connection
ATI
Display product identification information
ATL
Set monitor speaker loudness
ATM
Set monitor speaker mode
ATO
Switch from command mode to data mode
ATP
Select pulse dialling
ATQ
Set Result code presentation mode
ATS0
Set number of rings before automatically answering the call
ATS3
Set command line termination character
ATS4
Set response formatting character
ATS5
Set command line editing character
ATS6
Set pause before blind dialling
ATS7
Set number of seconds to wait for connection completion
ATS8
Set number of seconds to wait when comma dial modifier used
ATS10
Set disconnect delay after indicating the absence of data carrier
ATT
Select tone dialling
ATV
Set result code format mode
ATX
Set connect result code format and call monitoring
ATZ
Set all current parameters to user defined profile
AT&C
Set DCD function mode
AT&D
Set DTR function mode
AT&F
Set all current parameters to manufacturer defaults
AT&V
Display current configuration
AT&W
Store current parameter to user defined profile
AT+DR
V.42bis data compression reporting control
AT+DS
V.42bis data compression control
AT+GCAP
Request complete TA capabilities list
AT+GMI
Request manufacturer identification
AT+GMM
Request TA model identification
AT+GMR
Request TA revision identification
AT+GOI
Request global object identification
AT+GSN
Request TA serial number identification (IMEI)
AT+ICF
Set TE-TA control character framing
AT+IFC
Set TE-TA local data flow control
AT+ILRR
Set TE-TA local rate reporting mode
AT+IPR
Set fixed local rate
AT+CBST
SELECT BEARER SERVICE TYPE
AT+CGMI
REQUEST MANUFACTURER IDENTIFICATION
AT+CGMM
REQUEST MODEL IDENTIFICATION
AT+CGMR
REQUEST REVISION IDENTIFICATION
