Chapter 13 - Sim-Related Commands; At+Crsm Restricted Sim Access - Multi-Tech MultiModem EDGE Reference Manual

Chapter 13 – SIM-Related Commands
The AT commands described in this chapter are related to the Subscriber Identity Module (SIM) connected to the
Multi-Tech wireless modem.
If using data from the SIM please bear in mind that the content of all Elementary Files is subject to change at any
moment!
This is true because the network can change the SIM's data in the background via the SIM Application Toolkit (SAT)
procedure "Data download to SIM". For a detailed description please refer to GSM 11.14.
To get informed that changing Elementary Files has taken place the TA needs to hook to the SAT Proactive
Command "REFRESH". To achieve this, the AT command interface of SAT, i.e., Remote-SAT, needs to be activated.

13.1 AT+CRSM Restricted SIM Access

AT+CRSM offers easy access of the Elementary Files on the SIM. Access to the SIM database is
Description:
restricted to the commands which are listed at <command>. However, additional SIM commands
are available via AT^SXSM.
All parameters of AT+CRSM are used as specified by GSM 11.11. The Multi-Tech wireless modem
handles internally all required SIM interface locking and file selection routines.
As response to the command, the Multi-Tech wireless modem sends the actual SIM information
parameters and response data. Error result code "+CME ERROR" may be returned if the command
cannot be passed to the SIM; e.g., if the SIM is not inserted. However, failure in the execution of
the command in the SIM is reported in <sw1> and <sw2> parameters.
AT+CRSM requires PIN authentication. However, using <command> "READ BINARY" and
<command> "READ RECORD" is possible before PIN authentication and if the SIM is blocked
(state after three failed PIN authentication attempts) to access the contents of the following
Elementary Files:
Test Command Syntax:
Response:
Write Command Syntax:
Response:
Parameter Descriptions:
<command>
SIM command number.
176
178
192
214
220
242
<fileID>
Identifier for an elementary data file on SIM, if used by <command>.
<P1>, <P2>, <P3>
Parameters to be passed on by the Multi-Tech wireless modem to the SIM.
0...255
Multi-Tech Systems, Inc. AT Commands for EDGE Modems (S000371G)
EF Symbol EF Name
EF ICC identification
ICCID
EF Extended language preference
ELP
EF Language preference
LP
EF Service provider name
SPN
EF Administrative data
AD
EF Phase identification
Phase
EF Emergency call codes
ECC
Please beware of possible changes to Elementary Files by the network at any time, refer
to Chapter 13, SIM-Related Commands.
AT+CRSM=?
OK
AT+CRSM=<command>[, <fileID>[, <P1>, <P2>, <P3>[, <data>]]]
+CRSM: <sw1>,<sw2>[,<response>]
OK
ERROR
+CME ERROR: <err>
READ BINARY
READ RECORD
GET RESPONSE
UPDATE BINARY
UPDATE RECORD
STATUS
Chapter 13 – SIM-Related Commands
EF ID (hex.) EF ID (dec.)
2FE2 12258
2F05 12037
6F05 28421
6F46 28486
6FAD 28589
6FAE 28590
6FB7 28599
218