Maestro Wireless Solutions
            Knowledge Base Maestro Wireless Solutions Modems

            How to enable CSD on M1003G

            CSD (Circuit Switched Data, also commonly referred to as data call) is an old telecommunications technology that still has lots of traction due to the high amount of legacy systems that rely on it nowadays. It is being abandoned by the carriers, though, and it only works on 2G networks at the moment.

            M1003G can still be used for CSD communication when configured properly. For that, a specific firmware is required and then the modem has to be configured to operate in 2G mode. After upgrading the firmware with the executable provided below, execute following commands to make sure that the modem is ready:
            Please, make sure you read the specific instructions before upgrading your modem to firmware versions from R7.54 or R7.53. If your modem is older than R7.53 please contact our support to guide you through the upgrade: http://update.maestro-wireless.com/M100/M1003G/Firmware/R7.53.1_SL808xT/
            AT+WHCNF=8,1,2,1,1,1;&W
            AT!ENTERCND="A710"
            AT!CUSTOM="PUKPRMPT",1
            AT!CUSTOM="MEPCODE",1
            AT!CUSTOM="ISVOICEN",1
            AT!CUSTOM="STKUIEN",2
            AT!CUSTOM="PRLREGION",1
            AT!CUSTOM="PCSCDISABLE",3
            AT!CUSTOM="GPSENABLE",1
            AT!CUSTOM="GPSLPM",1

            The below instructions assume that the firmware R7.54.14.A1.201903061040.SL808xA_ExtAT_3 is flashed on the device. The firmware can be flashed by launching the executable file provided at the bottom of the page. (see attached file)
            AT!ENTERCND="A710"
            AT!MAPMTPDP=0
            AT+CBST=0,0,1
            AT+CICB=0
            AT+CSNS=4
            //This command requires the SIM card to be inserted into the modem
            AT+WWSM=0
            ATS0=2
            AT&W
            AT+CFUN=1

            Recovering the LED functionality: it will be necessary to reinstall the SmartPack application on your modem for the LED to recover its default behaviour.


            Updated: 15 Dec 2019 03:42 PM
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