GE864-QUAD-V2 #DTMF

2 thoughts on “GE864-QUAD-V2 #DTMF

  1. I am using a "GE864-QUAD-V2" with revision 10.00.022, but cannot get AT#DTMF working.

     

    Set CPUMODE=1 (or 2) but AT#DTMF always returns ERROR.

     

    Is there any other settings that need to be set to enable DTMF detection.