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ETSI
TS 101 267 V6.3.0 (1999-05)13(GSM 11.14 version 6.3.0 Release 1997)
Response parameters/data: None.
6 Proactive SIM
6.1 Introduction
GSM 11.11 [14] defines that the ME communicates to the SIM using the T=0 protocol, which is specified in
ISO/IEC 7816-3 [16]. The ME is always the "master" and initiates commands to the SIM, and therefore there is no
mechanism for the SIM to initiate a communication with the ME. This limits the possibility of introducing new SIM
features requiring the support of the ME, as the ME needs to know in advance what actions it should take.
The proactive SIM service provides a mechanism which stays within the protocol of T=0, but adds a new status response
word SW1. This status response has the same meaning as the normal ending ('90 00'), and can be used with most of the
commands that allow the normal ending, but it also allows the SIM to say to the ME "I have some information to send to
you". The ME then uses the FETCH function to find out what this information is.
To avoid cross-phase compatibility problems, these functions shall only be used between a proactive SIM and an ME
that supports the proactive SIM feature.
The SIM can issue a variety of commands through this mechanism, given in alphabetical order:
- DISPLAY TEXT, which displays text on screen (no more than 160 characters). A high priority is available, to
replace anything else on screen.
- GET INKEY, which sends text to the display and requests a single character response in return. It is intended to
allow a dialogue between the SIM and the user, particularly for selecting an option from a menu.
- GET INPUT, which sends text to the display and requests a response in return. It is intended to allow a dialogue
between the SIM and the user.
- MORE TIME, which does not request any action from the ME. The ME is required to respond with
TERMINAL RESPONSE (OK) as normal - see below. The purpose of the MORE TIME command is to provide
a mechanism for the SIM Application Toolkit task in the SIM to request more processing time.
- PLAY TONE, which requests the ME to play a tone in its earpiece, ringer, or other appropriate loudspeaker.
- POLL INTERVAL, which negotiates how often the ME sends STATUS commands to the SIM during idle
mode. Polling is disabled with POLLING OFF. Use of STATUS for the proactive SIM is described in
GSM 11.11 [14].
- PROVIDE LOCAL INFORMATION which requests the ME to pass local information to the SIM, for
example the mobile country and network codes (MCC + MNC) of the network on which the user is registered.
- REFRESH, which requests the ME to carry out a SIM initialization according to GSM 11.11 subclause 12.2.1,
and/or advises the ME that the contents or structure of EFs on the SIM have been changed. The command also
makes it possible to restart a card session by resetting the SIM.
- SELECT ITEM, where the SIM supplies a list of items, and the user is expected to choose one. The ME
presents the list in an implementation-dependent way.
- SEND SHORT MESSAGE, which sends a short message or SMS-COMMAND to the network.
- SEND SS, which sends a SS request to the network.
- SET UP CALL, of which there are three types:
- set up a call, but only if not currently busy on another call;
- set up a call, putting all other calls (if any) on hold;
- set up a call, disconnecting all other calls (if any);
- SET UP MENU, where the SIM supplies a list of items to be incorporated into the ME's menu structure.