User guide

AUDIO COMMANDS
195 AT Commands for EV-DO-EV3 Modems
Handsfree Echo Canceller #SHFEC
C2 models only.
Set command enables/disables the echo canceller function on audio handsfree output.
Read command reports the <mode> parameter value, in the format:
#SHFEC: <mode>
Test command reports the supported value range for <mode>.
Syntax
Command Command type
AT#SHFEC=<mode> Set
AT#SHFEC? Read
AT#SHFEC=? Test
Parameters and Values
<mode>
0 Disables echo canceller for handsfree mode. Default: 0.
1 Enables echo canceller for handsfree mode.
Notes
 Save this parameter in non-volatile memory by issuing AT&W command.
Handsfree Microphone Gain #HFMICG
C2 models only.
Set command sets the handsfree microphone input gain.
Read command returns the current handsfree microphone input gain, in the format:
#HFMICG: <level>
Test command returns the supported value range for <level>.
Syntax
Command Command type
AT#HFMICG=<mode> Set
AT#HFMICG? Read
AT#HFMICG=? Test
Parameters and Values
<level> Handsfree microphone input gain.
0-7 Handsfree microphone input gain +6dB/step. Default: 4.