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TC63_ATC_V00.490

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This chapter contains the reference of AT commands and responses related to the Remote SIM Access (RSA)

feature of the Cellular Engine TC63. 

RSA allows the TC63 to use a SIM card via its serial interface additionally to the SIM which is locally attached

via the dedicated lines on the interface connector. 

For further details contact the Wireless Modules Application Engineering Department at Siemens AG.

Figure 

 illustrates a possible RSA use case: 

• The TC63 is built in a car as part of and controlled by a Car Application, e.g. a telematic or telemetry system. 
• If a car driver enters his car he connects his cell phone with the Car Application. This can be done via a car

cradle or a wireless link. 

The necessary protocols and procedures are implemented following the «SIM Access Profile Interoperability

Specification» 

. 

As stated there, with this profile the user can personalize his/her car-embedded phone with a SIM card in an

external device, which is connected via a wireless link. The external device can either be a simple SIM card

holder or a portable phone, which is brought into the car. 

The SIM Access Profile builds on the interface between the telephone and a SIM card, refer to the «Specifi-

cation of the Subscriber Identity Module (GSM 11.11)» 

. 

Since the TC63 itself does not control a Bluetooth wireless link, the SIM communication is routed via a serial

channel. It's up to an external application to map this data to any suitable communication path, e.g. a car cra-

dle or a Bluetooth modem as the SIEMOS Bluetooth-Module offered by Siemens AG. 

Figure 15.1: Basic Remote SIM Access Usage Scenario