Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 90 23.06.2010
+CME ERROR: <err>
Parameters
<length> integer type: length of characters sent to the TE in
<Command> or <response> (i.e. twice the number of
octets in the raw data)
<Command> string type(string should be included in quotation marks):
hex format: GSM 11.11 SIM Command sent from
the ME to the SIM
<response> string type(string should be included in quotation marks):
hex format: GSM 11.11 response from SIM to
<Command>
Reference
GSM 07.07 [13]
Note
3.2.49 AT+CALM Alert Sound Mode
AT+CALM Alert Sound Mode
Response
+CALM: (list of supported <mode>s)
OK
+CME ERROR: <err>
Test Command
AT+CALM=?
Parameter
See Write Command
Response
+CALM: <mode>
OK
+CME ERROR: <err>
Read Command
AT+CALM?
Parameter
See Write Command
Response
OK
+CME ERROR: <err>
Write Command
AT+CALM=<mo
de>
Parameter
<mode> 0 normal mode
1 silent mode (all sounds from ME are prevented)
Reference
GSM 07.07 [13]
Note