Specifications

SIM900 AT Command Manual
SIM900_AT Command Manual_V1.03 89 12/24/2010
OK
If error is related to ME functionality:
+CME ERROR: <err>
AT+CALM=<mo
de>
Parameter
<mode> 0 normal mode
1 silent mode (all sounds from ME are prevented)
Reference
GSM 07.07 [13]
Note
If CALM is set to silent mode before, when user sets CALM to normal
mode during an incoming call, the module maintains silent this time. But
next time the normal mode works.
3.2.50 AT+CALS Alert Sound Select
AT+CALS Alert Sound Select
Response
+CALS: (list of supported <n>s)
OK
If error is related to ME functionality:
+CME ERROR: <err>
Test Command
AT+CALS=?
Parameter
See Write Command
Response
+CALS: <n>
OK
If error is related to ME functionality:
+CME ERROR: <err>
Read Command
AT+CALS?
Parameter
See Write Command
Response
OK
If error is related to ME functionality:
+CME ERROR: <err>
Write Command
AT+CALS=<n>
Parameter
<n> 0-19 alert sound type
Reference Note
3.2.51 AT+CRSL Ringer Sound Level
AT+CRSL Ringer Sound Level
Test Command Response