Chapter 3: AT Commands Reference
April 15, 2008 G24-L AT Commands Reference Manual 3-47
+CAMM, Accumulated Call Meter Maximum
This command sets the Advice of Charge accumulated call meter maximum value in the SIM file,
EFACMmax. ACMmax contains the maximum number of home units the subscriber is able to
consume. When the ACM (Refer to “+CACM, Accumulated Call Meter”, page 3-46) reaches
ACMmax, additional calls (mobile-originated and mobile-terminated calls that incur charges) are
prohibited, except for emergency calls. Refer to GSM 02.24.
The following table shows the +CAMM parameters.
Example
AT+CAMM=?
OK
AT+CAMM="FFFFFF","2222"
OK
AT+CAMM?
+CAMM: "FFFFFF"
OK
Command Type Syntax Response/Action Remarks
Set
+CAMM=[<acm
max>,<passwd>]
OK
+CME ERROR: <err>
The Set command sets the
accumulated call meter maximum
value. SIM PIN2 is required. The value
that is set remains after a power cycle.
Note:
This command is activated if
Advice of Charge is supported
by the network.
Read
+CME ERROR: <err>
The Read command displays the
current value of ACMmax.
Test
+CAMM=? OK
The Test command indicates whether
the +CAMM command is functioning.
Table 3-23: +CAMM Parameters
<Parameter> Description
<acmmax> Accumulated call meter maximum value (similar to CCM; Refer to “+CAOC, Advice
of Charge”, page 3-44)
<ccm>
String type; three bytes of the current call meter value in hexadecimal format (for
example, 00001E indicates a decimal value of 30). Value is given in home units; bytes
are similarly coded as the ACMmax value in the SIM.
Range is from 00001 to FFFFFF.
0 Disables ACMmax (default)
<passwd> SIM PIN2 password
Maximum string length is 8 characters. If this value is exceeded, the command
terminates in an error. If PIN2 is incorrect, "+CME ERROR: incorrect password" is
displayed.
