Siemens AC75 Benutzerhandbuch

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AC75_ATC_V01.002

Page 426 of 569

10/30/06

Confidential / Released

The following commands might be of interest while using the RSA feature. 
•

 

This AT command is used to check the current status of the SIM (local or remote).

•

 

After power on and personalization (PIN entry if required), the ME starts reading data from the SIM. Please

keep in mind that after entering the PIN, even after the TE sends "OK", subsequent commands that need

access to data stored on the SIM may be blocked for up to 30 seconds. It may take even longer to access the

remote SIM depending on the establishment of the RSA communication link. Therefore, it is recommended

to take advantage of the "^SSIM READY" URC enabled with the 

 command. This URC notifies the

user when the process of reading SIM has completed. Afterwards all commands regarding to SIM data files

can be used, e.g. the SMS and phonebook commands.

•

This command is recommended for querying the state of current calls. A list of all active calls will be returned.

This is especially important when the user wants to terminate the SAP connection using

,,,,

; with 

 set to 1. All

calls or active GPRS contexts established via remote SIM will be terminated and the ME will use the locally

attached SIM card.

• SIM data storage

It is recommended that all user relevant data are stored on the SIM only. For example, added phonebook and

SMS entries in the client's storage are not accessible after a RSA connection.

To set up an RSA connection in a PC environment an appropriate PC application is needed. For test and eval-

uation purposes and as exemplary implementation guidance Siemens offers a PC application called "Com-

Bridge". For ordering details contact your local Siemens dealer. "ComBridge" provides basic features to simulate

an RSA application environment, e.g. mapping of the SAP communication between a SAP server and client. To

support the different RSA coding modes (SAP and XSAP) and to transfer data between the two COM ports, the

PC application uses two variable modules (filters): 
• XSAP filter

Translating the "^SRSM" URCs into the 

 command

• SAP filter 

Transparently transfer binary SAP messages. The generic "1:1" filter ("software null modem") can also be

used for this purpose, but communication might be slower since it performs bytewise data transfer.

A connection between a cellular engine operating as a SAP client and an ME that supports Bluetooth and SIM

Access profile requires: 

a) System requirements 
• Windows 2000, Windows XP (or later) installed
• USB Bluetooth dongle. It is recommended to use the Fujitsu-Siemens product with the "PlugFree" Bluetooth

driver. This driver allows connections to Bluetooth profiles which are not yet specified by the SIG, e.g. SAP.

b) Installation procedure 
• After installing the USB Bluetooth dongle and the "PlugFree" driver software, the Bluetooth profiles are acces-

sible via their own virtual COM port.

• If the WinMux driver has been installed another three virtual channels (mapped to additional COM ports) are

available. The physical Multiplexer COM port is connected to the cellular engine.