Sony Ericsson T300 manual Network-dependent features, SMS and EMS messaging

T300/T302

White Paper, August 2002

Network-dependent features

SMS and EMS messaging

The T300/T302 is capable of sending and receiving SMS and EMS messages, and linked messages.

•With the Short Messaging 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 message (network-dependent ser- vice)

A Service Centre (SC) acts as a a storage and forwarding centre. The T300/T302 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 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.

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