Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 121 12/24/2010
AT+CCPD ENABLE OR DISABLE ALPHA STRING
AT+CGID GET SIM CARD GROUP IDENTIFIER
AT+MORING SHOW STATE OF MOBILE ORIGINATED CALL
AT+CMGHEX ENABLE OR DISABLE SENDING NON-ASCII CHARACTER SMS
AT+AUTEST AUDIO CHANNEL LOOPBACK TEST
AT+CCODE CONFIGURE SMS CODE MODE
AT+CIURC ENABLE OR DISABLE INITIAL URC PRESENTATION
AT+CPSPWD CHANGE PS SUPER PASSWORD
AT+EXUNSOL ENABLE OR DISABLE PROPRIETARY UNSOLICITED
INDICATIONS
AT+CGMSCLASS CHANGE GPRS MULTISLOT CLASS
AT+CDEVICE VIEW CURRENT FLASH DEVICE TYPE
AT+CCALR CALL READY QUERY
AT+ GS V DISPLAY PRODUCT IDENTIFICATION INFORMATION
AT+SGPIO CONTROL THE GPIO
AT+SPWM GENERATE THE PULSE-WIDTH-MODULATION
AT+ECHO ECHO CANCELLATION CONTROL
AT+CAAS CONTROL AUTO AUDIO SWITCH
AT+ SV R CONFIGURE VOICE CODING TYPE FOR VOICE CALLS
AT+GSMBUSY REJECT INCOMING CALL
6.2 Detailed Descriptions of Commands
6.2.1 AT+SIDET Change the Side Tone Gain Level
AT+SIDET Change the Side Tone Gain Level
Response
+SIDET: (list of supported <channel>s),(list of supported <gainlevel>s)
OK
Test Command
AT+SIDET=?
Parameters
See Write Command
Response:
+SIDET: <gainlevel>,<gainlevel>
OK
Read Command
AT+SIDET?
Parameters
See Write Command