Specifications

Smart Machine Smart Decision
SIM900_AT Commands Manual_V1.07 159 2012.12.10
z <esn> <sesn> <moden> values of read command are related to channel
<micn>specific.
6.2.48 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=<mo
de>
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
word, if "AT+CEXTHS=1" is set, the unsolicited event code
(indicating whether the headset has been attached/detached) will be
sent to the terminal.