Chapter 10 – Supplementary Services Commands
Multi-Tech Systems, Inc. Wireless GSM/GPRS AT Commands (Document Number S000293I) 86
Accumulated Call Meter Maximum +CAMM
Description: The set command sets the Advice of Charge related to accumulated call meter maximum value in SIM
file EFACMmax. ACMmax contains the maximum number of home units the subscriber is allowed to
consume. When ACM (see +CACM) reaches ACMmax, calls are prohibited. SIM PIN2 is required to set
the value. If setting fails in an ME error, +CME ERROR: <err> is returned.
The Read command returns the current value of ACMmax.
The ACMmax value (entered or displayed) is in hexadecimal format with 6 digits.
Values: <ACMmax> String type coded as <ccm> under +CAOC. Value 0 disables ACMmax feature.
<pin2 passwd> String type
Syntax: Command syntax: AT+CAMM:<ACMmax>,<pin2 passwd>
Command Possible responses
AT+CAMM=”000400”,1234
Note: Request ACMmax update, PIN2 is “1234” OK
Note: ACMmax updated to 1024
AT+CAMM=”000400”,0000
Note: Request ACMmax update, PIN2 is “1234” +CME ERROR: 16
Note: Incorrect password
AT+CAMM ?
Note: Request ACMmax value +CAMM: “000400”
OK
Note: ACMmax = 1024
Price Per Unit and Currency Table +CPUC
Description: T he set command sets the parameters for Advice of Charge related to price per unit and the currency
table in SIM file EFPUCT. PUCT information can be used to convert the home units (as used in +CAOC,
+CACM and +CAMM) into currency units. SIM PIN2 is required to set the parameters. If setting fails in
an ME error, +CME ERROR: <err> is returned..
Values: <currency> String type
<ppu> String type
<pin2 passwd> String type
Syntax: Command syntax: AT+CPUC <currency>,<ppu>,<pin2 passwd>
Command Possible responses
AT+CPUC=”FFR”,”0.82”,1234
Note: Request Currency and Price per unit update OK
AT+CPUC=”FFR”,”0.82”,1111
Note: Request Currency and PPU update (wrong PIN2) + CME ERROR: 16
Note: Incorrect password
AT+CPUC?
Note: Request Currency and Price +CPUC:”FFR”,”0.82”
OK
Note: Currency= “FFR”
Price per unit= “0.82”