Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 136 12/24/2010
Test Command
AT+CHFA=?
Response
+CHFA: (0 = NORMAL_AUDIO, 1 = HEADSET_AUDIO, 2 =
HANDFREE_AUDIO, 3 = HEADSET_HANDFREE_AUDIO)
OK
Response
+CHFA: <n>
OK
Read Command
AT+CHFA?
Parameter
See Write Command
Response
OK
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+CHFA=<n>
Parameter
<n> 0 main audio handset channel
1 aux audio headset channel
2 main audio handfree channel
3 aux audio handfree channel
Reference Note
z This Command swaps the audio channels among different channels.
z This command is related to the actual module.
6.2.23 AT+CSCLK Configure Slow Clock
AT+CSCLK Configure Slow Clock
Response
+CSCLK: (list of supported <n>s)
OK
Test Command
AT+CSCLK=?
Parameter
See Write Command
Response
+CSCLK: <n>
OK
Read Command
AT+CSCLK?
Parameter
See Write Command
Write Command
AT+CSCLK
Response
OK