Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 153 12/24/2010
0-6 (when mic=0 or1 default value is 0; when mic=2 or 3 default
value is 5)
<mode> 0 close echo algorithm
1 open echo algorithm
Reference Note
For this command, please refer to actual model.
6.2.49 AT+CAAS Control Auto Audio Switch
AT+CAAS Control Auto Audio Switch
Response
+CAAS: (0-2)
OK
Test Command
AT+CAAS=?
Parameter
See Write Command
Response
+CAAS: <mode>
OK
Read Command
AT+CAAS?
Parameter
See Write Command
Response
This parameter setting determines whether or not the audio channel will be
switched automatically to the corresponding channel in case of headset
attaching or detaching.
OK
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+CAAS=
<mode>
Parameter
<mode>
0 disable automatic audio channel switch function, the headset
HOOK function is disabled;
1 enable automatic audio channel switch function, the headset
HOOK function is enabled;
2 disable automatic audio channel switch function, the headset
HOOK function is enabled.
Reference Note
z For this command, please refer to actual model.
z The headset detection is still worked when <mode> is set to 0. In other