Specifications

AT Command Set Reference
Ver. 1.00
GSM1308AT001 Page 208 Ver. 1.00 – 10/29/2008
4.3. Advanced Audio Commands
4.3.1. $DFIR Configure Downlink FIR
Coefficients
Command Function This command allows the user to set the
downlink FIR filter coefficients to improve
voice quality.
Command Functional Enfora Specific
Group
Command Format Query AT$DFIR=?
Response $DFIR: 0-ffff,0-ffff, ... 0-ffff (32 entries)
OK
Write Format AT$DFIR =<coeff1>,<coeff2>, …
Response <coeff31>,<coeff32>
OK
Read Format AT$DFIR?
Response $DFIR: <coeff1>, <coeff2>, … (12)
<coeff13>, <coeff14>, … (12)
<coeff25>, <coeff26>, … (8)
Execution Format N/A
Response N/A
Parameter Values
< coeff1 > 0-ffff=> 2.14 fixed point number.
< coeff2 > 0-ffff=> 2.14 fixed point number.
…
< coeff31 > 0-ffff=> 2.14 fixed point number.
< coeff32 > 0-ffff=> 2.14 fixed point number.
Reference N/A
Standard Scope Optional
Enfora Implementation Scope Full