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P800/P802
White Paper, January 2003
108
SIM Application Toolkit
SIM Application Toolkit (SIM-AT) is a method of developing small applications for mobile phones.
User interaction is via the screen and keyboard, whilst connectivity is provided by means of SMS
and USSD transports. SIM-AT can also be used to initiate phone calls. A typical application is to
provide a simple menu-based interface to value-added services provided by the mobile operator.
The application is stored and distributed on the SIM card. SIM-AT offers a powerful way to deploy
programs and services to users, without the need for new or upgraded equipment. All necessary
set-up and programming is distributed to users over the air, directly to their phones.
The P800 supports SIM-AT according to GSM 11.14 in order to protect investment in SIM-AT
based applications and to enable users to continue using the services and applications on their
SIM cards. The applications are accessed from within the UI of the P800’s Phone application.
The P800 also has much richer application environments including WAP, Web, C++ and Java.
These enable applications to be created with a much better UI and superior connectivity such as
TCP/IP over the internet.
SIM-AT Services supported by the P800
Service Description
CALL CONTROL This will enable the SIM to allow, bar or modify a call
(supplementary service operation or USSD operation).
DISPLAY TEXT Text is displayed on the screen according to the request from the
SIM application:
Priority: Normal, High
Clear Message: Automatic after delay, Wait for user.
Alphabet: UCS2, packed and unpacked SMS default
EVENT DOWNLOAD The Event Download enables the ME to report on events to the
SIM:
• Location Status
•
Idle Screen Available
•
Language Selection
• Call Connected
•
Call Disconnected
• Browser Termination
GET INKEY Request the user to enter a single character.
• 0-9 *# + only or alphabet set
•
Yes/No Response
•
SMS default or UCS2 character set
GET INPUT Request the user to enter a number of characters.
•
0-9 *# + only or alphabet set
• SMS default or UCS2 character set
•
Input echoed or secret
• Packed or unpacked.
LAUNCH BROWSER The P800 will launch the integrated browser.