Specifications

SIM900 AT Commands Set
SIM900_ATC_V1.01 48 23.06.2010
Parameters
<acmmax> string type (string should be included in quotation
marks); three bytes of the max. ACM value in
hex-decimal format (e.g. "00001E" indicates decimal
value 30)
000000
disable ACMmax feature
000001-FFFFFF
<passwd> string type (string should be included in quotation
marks)
SIM PIN2
Reference
GSM 07.07 [13]
Note
3.2.3 AT+CAOC Advice of Charge
AT+CAOC Advice of Charge
Test Command
AT+CAOC=?
Response
+CAOC: (list of supported <mode>s)
OK
Parameters
see Write Command
Read Command
AT+CAOC?
Response
+CAOC: <mode>
OK
Parameters
see Write Command
Write Command
AT+CAOC=<mo
de>
Response
TA sets the Advice of Charge supplementary service function mode.
If error is related to ME functionality:
+CME ERROR: <err>
ERROR
If <mode>=0, TA returns the current call meter value
+CAOC: <ccm>
OK
If <mode>=1, TA deactivates the unsolicited reporting of CCM value
OK
If <mode>=2, TA activates the unsolicited reporting of CCM value
OK
Parameters
<mode> 0 query CCM value