Data Sheet
     Smart Machine Smart Decision 
SIM800 Series_AT Command Manual_V1.09  8  2015-08-03 
6.2.55 AT+CSGS  Netlight Indication of GPRS Status.....................................................187 
6.2.56 AT+CMICBIAS    Close or Open the MICBIAS ......................................................188 
6.2.57 AT+DTAM  Set TTS and RECORD Play Mode in Call .........................................189 
6.2.58 AT+SJDR  Set Jamming Detection Function ...........................................................189 
6.2.59 AT+CPCMCFG Set PCM Parameter ......................................................................191 
6.2.60 AT+CPCMSYNC Set PCM Sync Parameter...........................................................192 
6.2.61 AT+CANT    Antenna Detecting ................................................................................193 
6.2.62 AT+CAGCSET  Close or Open AGC Function .......................................................194 
6.2.63 AT+SD2PCM  SD and PCM Switch Function.........................................................194 
6.2.64 AT+SKPD  Keypad Detecting Function...................................................................195 
6.2.65 AT+SIMTONEX Custom Tones ...............................................................................196 
6.2.66 AT+CROAMING Roaming State..............................................................................197 
6.2.67 AT+CNETSCAN Perform a Net Survey to Show All the Cells’ Information...........197 
6.2.68 AT+CMNRP Dual Serial Port Feature....................................................................198 
6.2.69 AT+CEGPRS Switch on or off EDGE ...................................................................199 
6.2.70 AT+CGPIO Control the GPIO by PIN Index ..........................................................200 
6.2.71 AT+CMEDPLAY    Play Audio File ..........................................................................201 
6.2.72 AT+CMEDIAVOL Control the Volume when Playing Audio File..........................202 
6.2.73 AT+SNDLEVEL Set the Sound Level of Special AT Command ............................202 
6.2.74 AT+ECHARGE Charge Control.............................................................................203 
6.2.75 AT+SIMTIMER Modify the Poll Interval Time Requested by SIM Card .............204 
6.2.76 AT+SPE Speech Enhancement Control..................................................................204 
6.2.77 AT+CCONCINDEX Report Concatenated SMS Index..........................................205 
6.2.78 AT+SDMODE  SD Mode Switch Function .............................................................205 
6.2.79 AT+SRSPT Control SMS Retransmission..............................................................206 
7 AT Commands for GPRS Support ......................................................208 
7.1 Overview of AT Commands for GPRS Support...............................................208 
7.2 Detailed Descriptions of AT Commands for GPRS Support............................208 
7.2.1 AT+CGATT Attach or Detach from GPRS Service ..................................................208 
7.2.2 AT+CGDCONT Define PDP Context .......................................................................209 
7.2.3 AT+CGQMIN Quality of Service Profile (Minimum Acceptable) ...........................210 
7.2.4 AT+CGQREQ Quality of Service Profile (Requested) ............................................. 211 
7.2.5 AT+CGACT PDP Context Activate or Deactivate....................................................213 
7.2.6 AT+CGDATA Enter Data State .................................................................................214 
7.2.7 AT+CGPADDR Show PDP Address .........................................................................214 
7.2.8 AT+CGCLASS GPRS Mobile Station Class.............................................................215 
7.2.9 AT+CGEREP    Control Unsolicited GPRS Event Reporting ......................................216 
7.2.10 AT+CGREG Network Registration Status ..............................................................217 
7.2.11 AT+CGSMS Select Service for MO SMS Messages ..............................................218 
8 AT Commands for TCPIP Application Toolkit ..................................220 
8.1 Overview ..........................................................................................................220 
8.2 Detailed Descriptions of Commands................................................................221 










