Rainbow Electronics FARGO MAESTRO 100 (with TCP_IP) - Manual (Page 475)

SIM Commands
Restricted SIM Access +CRSM
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WM_DEV_OAT_UGD_049 - 001 VOLUME 3 August 23, 2007
18.4 Restricted SIM Access +CRSM
18.4.1 Description
By using this command instead of Generic SIM Access +CSIM, the application has
easier but more limited access to the SIM database. This command transmits the SIM
<command> and its required parameters to the MT.
As response to the command, the MT sends the actual SIM information parameters
and response data. The MT error result code "+CME ERROR: <err>" may be returned
when the command cannot be passed to the SIM, but failure in the execution of the
command in the SIM is reported in the response parameters.
As with the +CSIM command, there is no locking between two successive
commands. The user should be aware of the precedence of the GSM application
commands over the TE commands.
18.4.2 Syntax
Action command
AT+CRSM=<command>[,<fileid>[,<P1>,<P2>,<P3>[,<data>]]]
+CRSM: <sw1>,<sw2>[,<response>]
OK
Read command
AT+CRSM?
OK
Test command
AT+CRSM=?
OK