Ericsson manual SIM Application Toolkit, SIM AT Services Supported By The T39

SIM APPLICATION TOOLKIT

The SIM Application Toolkit (SIM AT) is a smartcard-centric method of deploying programs that apply only to GSM and to SMS and USSD transports. Programs must be distributed on smartcards. WAP is an internet-centric method of deploying programs that is independent of network technology. Programs and content are kept centrally on web servers and downloaded as required. While there is some overlap, WAP is a particularly good choice when deploying pro- grams that also have an HTML version for desktop use. Work is currently underway on building interfaces between the two technologies.

For an operator, a company or service provider, SIM AT offers a powerful way to deploy pro- grams and services to users, without the need for new or upgraded equipment. All necessary setup and programming is distributed to the users over the air, directly to their phones. In the T39, a separate menu is available for functions residing on the SIM card. These can include sub- menus for controlling functions, and also functions which allow the phone to initiate calls, send data, and display information for the user.

SIM AT Services Supported By The T39

Service	Mode	Support
		in T39
CELL BROADCAST		Yes
DOWNLOAD
DISPLAY TEXT	General: Support for packed and unpacked	Yes
	format in SMS default alphabet as well as
	UCS2 alphabet.
	bit 1: 0 = normal priority	Yes
	1 = high priority	Yes
	bit 8: 0 = clear message after a delay	Yes
	1 = wait for user to clear message	Yes
GET INKEY	General: The GET_INKEY requires that the	Yes
	user press “Yes” to confirm his/her choice
	bit 1: 0 = digits (0-9, *, # and +) only	Yes
	1 = alphabet set
		Yes
	bit 2: 0 = SMS default alphabet	Yes
	1 = UCS2 alphabet
		Yes
	bit 3: 0 = character sets defined by bit 1	No
	and bit 2 are enabled.
	1 = character sets defined by bit 1	No
	and
	bit 2 are disabled and the “Yes/No”
	response is requested.

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