User manual

Wavecom GSM Modem
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3.12. SideTone modification +SIDET
The syntax of the command is :
AT+SIDET=<val1>,<val2>
This command is used to get an echo of the voice in the speaker (to
hear what is said in the speaker).
<val2> level <val1> presence
0 0 db 0 SideTone is disabled
1 - 6 db 1 SideTone is enabled
2 -12 db
3 -18 db
Application to GSM AT+SIDET=1,0
GSM to application OK command valid
Application to GSM AT+SIDET? current value
GSM to application +SIDET: 1,0
OK
command valid
3.13. Echo canceler +ECHO
The syntax of the command is :
AT+ECHO=<val1>,<val2>
This command is used for car kit applications to reduce the echo effects
than can occur in a car.
<val2> attenation <val1> presence
0 - 18 db 0 Echo is disabled
1 - 24 db 1 Echo is enabled
2 -30 db
3 - 36 db