Interruption Of Gprs Data Account; Sim Application Toolkit - Sony Ericsson Z300 White Paper

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Table Of Contents

Table of Contents

The GSM system limits the ability to use all eight

time slots, so the Z300 uses up to four time slots

for receiving data, and one slot for transmitting.

This means the speed for receiving data is up to

85,600 bps and up to 21,400 bps for sending data.

Using GPRS with the Z300 has several advantages,

for example:

• Constant connection

• High speed

• Automatic access to increased bandwidth while

downloading large files such as pictures and

sounds

• Cost efficiency

• Use of transmission capacity only when needed

to reduce cost

• WAP over GPRS

SIM application toolkit

The SIM Application Toolkit (SIM AT) is a smart

card-centric method of deploying programs that

applies only to GSM and to SMS and USSD trans-

ports. Programs must be distributed on smart

cards. WAP is an Internet-centric method of

deploying programs that is independent of network

technology. Programs and content are kept cen-

trally on web servers and downloaded as required.

While there is some overlap, WAP is a particularly

good choice while deploying programs 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 programs

and services to users, without the need for new or

upgraded equipment. All necessary setup and pro-

gramming is distributed to users over the air,

directly to their phones. In the Z300, a separate

menu is available for functions residing on the SIM

card. These can include submenus for controlling

functions, and also functions that allow the phone

to initiate calls, send data, and display information

to the user.

• Access to Internet via WAP at high speed and

with a constant connection.

• Provide settings

• Receive GPRS configuration settings from the

provider over the air, OTA, making manual con-

figuration unnecessary.

• User controlled settings

• Take advantage of full user control in the data

connections menu, establishing multiple

descriptions and accessing advanced settings

for GPRS.