AT COMMAND INTERFACEThe Navtalk GSM supports the following AT commands. They correspond to the commands of AT Hayes-compatible modems applicable for GSM 07.07.OverviewCommand DescriptionA/ Re-issues last AT command given+++AT ESC from Data mode to command modeATA Answer incoming callATD Mobile Originated call to dialable numberATD> Originate call to phone number in memory ATD> Originate call to phone number in current memoryATDL Redial last telephone number usedATE Set command echo modeATH Disconnect existing connectionATI Display product identification informationATL Set monitor speaker loudnessATM Set monitor speaker modeATO Switch from command mode to data modeATP Select pulse diallingATQ Set Result code presentation modeATS0 Set number of rings before automatically answering the callATS3 Set command line termination characterATS4 Set response formatting characterATS5 Set command line editing characterATS6 Set pause before blind diallingATS7 Set number of seconds to wait for connection completionATS8 Set number of seconds to wait when comma dial modifier usedATS10 Set disconnect delay after indicating the absence of data carrierATT Select tone diallingATV Set result code format modeATX Set connect result code format and call monitoringATZ Set all current parameters to user defined profileAT&C Set DCD function modeAT&D Set DTR function modeAT&F Set all current parameters to manufacturer defaultsAT&V Display current configurationAT&W Store current parameter to user defined profileAT+DR V.42bis data compression reporting controlAT+DS V.42bis data compression controlAT+GCAP Request complete TA capabilities listAT+GMI Request manufacturer identificationAT+GMM Request TA model identificationAT+GMR Request TA revision identificationAT+GOI Request global object identificationAT+GSN Request TA serial number identification (IMEI)AT+ICF Set TE-TA control character framingAT+IFC Set TE-TA local data flow controlAT+ILRR Set TE-TA local rate reporting modeAT+IPR Set fixed local rateAT+CBST SELECT BEARER SERVICE TYPEAT+CGMI REQUEST MANUFACTURER IDENTIFICATIONAT+CGMM REQUEST MODEL IDENTIFICATIONAT+CGMR REQUEST REVISION IDENTIFICATION
