BGS2T AT Command Set
15. SIM Application Toolkit (SAT) Commands
BGS2T_ATC_V01.301 Page 417 of 554 1/31/12
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15. SIM Application Toolkit (SAT) Commands
This chapter describes AT commands and responses related to the BGS2T's SIM Application Toolkit (SAT)
implementation.
SAT is a technology that allows an application running on the SIM to control the GSM Mobile Engine (ME); it is
specified in 3GPP TS 11.14 [15].
Remote SIM Application Toolkit, or short Remote-SAT, provides a link between an application running on the
SIM and the Customer Application (TE). The purpose of Remote-SAT is to allow the TE to send AT commands
to the SAT interface and to display dedicated SAT activity on the user interface of the TE. The overall scenario
is illustrated in the context diagram below.
Following types of data are exchanged between the BGS2T and the application running on the SIM:
• Proactive commands (PACs) are sent from the SIM application to the ME. Some PAC types are executed by
the ME itself, comparable with AT commands. Other PAC types are immediately forwarded to the TE, e.g.
"DISPLAY TEXT".
• Terminal Response is the ME's answer to the last PAC, sometimes to be provided by the TE.
• Envelope commands are sent from the ME or TE to the SIM Application, such as "MENU SELECTION".
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