Sony Ericsson T630 Benutzerhandbuch

White Paper

 T630/T628

45

October 2003

For Mobile Originated SMS, an SMS message is 
sent 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 mes-
sage is forwarded from the SMS-C to a Mobile Sta-
tion. When the Mobile Station receives the 
message, it returns a delivery report saying the 
transfer was successful.

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.

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 trans-
ports. Programs must be distributed on smart 
cards. For an operator, a company or service pro-
vider, 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 users over the 
air, directly to their phones. In the T630/T628, 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 dis-
play information to the user.