User`s guide

Chapter 1 – AT Commands for Remote SIM Application Toolkit
Multi-Tech Systems, Inc. SIM Application Toolkit AT Commands (S000391C) 9
1.1.7.2 Remote-SAT State Transition Table
The following table outlines which AT commands can be issued during certain states. However, the test and
read AT commands are available at any time. It is possible to determine the current state of the interface via
AT^SSTA?.
If a response contains text, the selected alphabet has to be used.
The meaning of Options in column “M/O/X” is as follows:
M: The TA has to issue the AT command to get Remote-SAT service (mandatory).
O: Issue of the AT command is optional.
X: Issue of the AT command is not allowed at this time and may cause an error message.
State AT Command
State after power on the ME. Remote SAT may be activated without SIM or PIN>
Action M/O/X Description
^SSTA=1,n O
^SSTGI=<pac> X
^SSTR=<pac> X
RESET
(0)
^SSTR=<event> X
State AT Command
SIM has started its application.
SAT service is available, but the Remote-SAT interface needs to be activated by the TA.
Action M/O/X Description
^SSTA=1,n O Enables SAT service, so that all SAT notifications
may be issued as URCs (^SSTN:<cmdType>).
^SSTGI=<pac> X
^SSTR=<pac> X
OFF
(1)
^SSTR=<event> X
State AT Command
SIM application is running, but no proactive command has been issued.
Action M/O/X Description
^SSTA=1,n O Use to switch to alphabet type <n>
^SSTGI=<pac> X
^SSTR=<pac> X
IDLE
(2)
^SSTR=<event> O Response to indicate TA; i.e., user activity.
State AT Command
SIM application has issued a proactive command. This event is signaled to the TA via
^SSTN:<cmdType>.
Action M/O/X Description
^SSTA=1,n O Use to switch to alphabet type <n>
^SSTGI=<pac> M Get information related to an issued notification
^SSTN:<cmdType>. This is requested before a
response can be issued via ^SSTR=<pac>.
^SSTR=<pac> X
PAC
(3)
^SSTR=<event> X
State AT Command
SIM application is waiting for the response to the ongoing proactive command.
Action M/O/X Description
^SSTA=1,n O Use to switch to alphabet type <n>
^SSTGI=<pac> X
^SSTR=<pac> M Issue terminal response related to the ongoing
proactive command.
WAIT
(4)
^SSTR=<event> X
Note: To limit the time Remote-SAT is kept in the states PAC or WAIT any ongoing (but unanswered) proactive
command will be aborted automatically after 10 minutes. In this case, the terminal response is either “ME currently
unable to process command”, or if applicable, “No response from user”. In addition a URC “Terminate Proactive
Command” will be sent to the external application.