Data Sheet

Smart Machine Smart Decision
SIM800 Series_AT Command Manual_V1.09 177 2015-08-03
+ECHO: (0,1),(0-65535),(0-65535),(0-65535),(0-65535),(0,1)
OK
AT+ECHO=?
Parameters
See Write Command
Response
+ECHO: (<mic0>,<nlp0>, <aec0>,<nr0>, <ns0>),(<micn>,<nlpn>,
<aecn>,<nrn>, <nsn>)
OK
Read Command
AT+ECHO?
Parameters
See Write Command
Response
OK
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+ECHO=<mi
c>,<nlp>,<aec>,<
nr>,<ns>[,<state
>]
Parameters
<mic> Audio channel
0 Main audio handset channel
1 Main audio handfree channel
<nlp> Nonlinear processing remove residual echo and background
noise
<aec> Acoustic echo cancellation
<nr> Noise reduction
<ns> Noise suppression
<state> Enable or disable to close echo algorithm
0 Echo algorithm be closed
1 Echo algorithm be actived
Parameter Saving
Mode
AUTO_SAVE
Max Response
Time
-
Reference Note
For this command, please refer to actual model.
The default state the echo echo algorithm be actived, and the read command
is not displayed.
6.2.43 AT+CAAS Control Auto Audio Switch
AT+CAAS Control Auto Audio Switch
Test Command
AT+CAAS=?
Response
+CAAS: (0-2)