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18. SUPPLEMENTARY SERVICES
309
LZT 123 7263 R1C
18.4 AT+CAOC Advice of Charge
Use of Advice of Charge supplementary service command enables the
subscriber to get information about the cost of calls. With <mode>=0,
the execute command returns the current call meter value from the ME.
The command also includes the possibility to enable an unsolicited
event reporting of the CCM information. The unsolicited result code
+CCCM: <ccm> is sent when the CCM value changes, but no more than
every 10 seconds. Deactivation of the unsolicited event reporting is
made with the same command.
Read command indicates whether the unsolicited reporting is activated
or not. Read command is available when the unsolicited result code is
supported.
It is recommended (although optional) that the test command return the
supported mode values.
Description Command Possible Responses
Execute command AT+CAOC[=<mode>] • [+CAOC: <ccm>]
+CME ERROR: <err>
•OK
•ERROR
Show the current
setting
AT+CAOC? •+CAOC: <mode>
•OK
•ERROR
Show if the command
is supported
AT+CAOC=? • [+CAOC: (list of
supported
<mode>s]
•OK
•ERROR
<mode> Description
0 Query CCM value
1 Deactivate the unsolicited reporting of CCM value
2 Activate the unsolicited reporting of CCM value
<ccm> Description
String type Three bytes of the current call meter value in hexadecimal
format (e.g. “00001E” indicates decimal value 30); value is
in home units and bytes are similarly coded as ACMmax
value in the SIM