Rainbow Electronics FARGO MAESTRO 100 (with TCP_IP) - Manual (Page 541)

Supplementary Services Commands
Accumulated Call Meter +CACM
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WM_DEV_OAT_UGD_049 - 001 VOLUME 3 August 23, 2007
20.12 Accumulated Call Meter +CACM
20.12.1 Description
This command resets the Advice Of Charge for Accumulated Call Meter (ACM) value
in SIM file EF-ACM. The ACM contains the total number of home units for both the
current and preceding calls. SIM PIN2 is required to reset the value.
20.12.2 Syntax
Action command
AT+CACM=<pin2passwd>
OK
Read command
AT+CACM?
+CACM: <acm>
OK
Test command
AT+CACM=?
OK