Specifications

AT Command Set Reference
Ver. 1.00
GSM1308AT001 Page 213 Ver. 1.00 – 10/29/2008
4.3.3. $PREAMP Set Uplink Voice Parameters
(continued)
Reference N/A
Standard Scope Optional
Enfora Implementation Scope Full
Notes Change in bias may or may not have an
affect, depending on hardware.
Extra gain is not supported in headset
mode. Changing the value in headset mode
will have no affect on the module
configuration.
Examples
AT$PREAMP =1,12,0 Max volume from the microphone.