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AC75_ATC_V01.002

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10/30/06

Confidential / Released

 allows direct control of the SIM. 

Compared to Restricted SIM Access command 

, the definition of 

 allows the ME to take more

control over the SIM interface. 

For parameter and SIM result coding please refer GSM 11.11 

. 

However, only the following SIM commands are supported by 

: SELECT, STATUS, READ BINARY,

UPDATE BINARY, READ RECORD, UPDATE RECORD, SEEK, INCREASE and GET RESPONSE. 

The SIM interface design requires that some actions need more than one command, e.g. access to an Elemen-

tary File's data requires a prior SELECT command. To ensure that two commands related to the same action are

sent to the SIM consecutively, i.e. without being interrupted by other software entities, each SELECT command

will be buffered in an internal directory path. Before performing new commands the internal directory path will be

checked to enable the retransmittion of the buffered SELECT command's (explicit selection). 

The directory path can be used to queue up to 20 Files e.g. 19 Dedicated Files (DF's) and 1 Elementary File (EF). 

After each 

 execution the Master File (MF) which acts as a logical root will be selected to guarantee

that other software entities are not affected. 

Length of 

 or 

 string.

Command passed on by the ME to the SIM. 

Response data of the command returned by the SIM. 

The following examples explain how to use 

Test Command

AT+CSIM=?

Response(s)

OK

Write Command

Response(s)

OK 

ERROR 

Reference(s)

PIN

ASC0 ASC1 USB MUX1 MUX2 MUX3 Charge

4

Last

GSM 07.07

<length>

(num)

<command>

(str)

<response>

(str)

AT+CSIM=14,"A0A40000027F10"

Select DF-Telekom

+CSIM: 4,"9F19"

Command successful, length '19' of the response

data

OK