User Manual

19. SUPPLEMENTARY SERVICES
287
LZT 123 7263 R1A
19.4 AT+CAOC Advice of Charge
Use of Advice of Charge supplementary service command (GSM 02.24
[11] and GSM 02.86 [12]) 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
Read command,
shows the current
mode
AT+CAOC? •+CAOC:<mode>
•OK
•ERROR
Test command, shows
if the command is
supported
AT+CAOC=? •[+CAOC:(listof
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 Threebytesofthecurrentcallmetervalueinhexadecimal
format (e.g. “00001E” indicates decimal value 30); value is
in home units and bytes are similarly coded as ACMmax
value in the SIM