Sony Ericsson T612 manual SIM application toolkit, SIM AT services supported by the T610/612

Network-dependent features

SMS and EMS messaging

The T610/T612 is capable of sending and receiving SMS and EMS messages, and linked messages.

•With the Short Message Service, a user can send text messages containing up to 160 characters to and from GSM mobile stations

•With the linked SMS, the user can link up to 10 SMS messages together to create a longer mes- sage (network-dependent service)

A Service Centre (SC) acts as a storage and forwarding centre. The T610/T612 also supports using SMS as a bearer type for connecting to WAP.

SMS consists of two basic services:

•Mobile Originated SMS

•Mobile Terminated SMS

For Mobile Originated SMS, an SMS message is sent

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from a Mobile Station to the SMS-C where it is forwarded to its destination. This can be another Mobile Station, or a terminal in the fixed network.

A Mobile Terminated SMS is when an SMS message is forwarded from the SMS-C to a Mobile Station. When the Mobile Station receives the message, it returns a delivery report saying the transfer was successful.

Fixed dialling and Restricted calls

For a company or an organization, it can be useful to restrict phone calls. Fixed Dialling allows the user to preset a number of digits, for example area codes. This restricts the user to making calls only to numbers which use the preset digits as leading digits. Fixed Dialling makes use of the PIN2, and it requires fixed dial fields on the SIM card.

The Restrict Calls service allows the user to block outgoing or incoming calls in certain situations, for example international calls.

SIM application toolkit

The SIM Application Toolkit (SIM AT) is a smart card- centric method of deploying programs that apply only to GSM and to SMS and USSD transports. Programs must be distributed on smart cards. For an operator, a company or service provider, SIM AT offers a powerful way to deploy programs and services to users, without the need for new or upgraded equipment. All necessary setup and

programming is distributed to users over the air, directly to their phones. In the T610/612, a separate menu is available for functions residing on the SIM card. These can include submenus for controlling functions, and also functions which allow the phone to initiate calls, send data, and display information to the user.

SIM AT services supported by the T610/612

Service	Mode	Support
CALL CONTROL		Yes
CELL BROADCAST		Yes
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