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T300/T302
White Paper, August 2002
32
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.