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T600/T602
White Paper, September 2002
Network-dependent features
SMS messaging
The T600/T602 is capable of sending and receiv-
ing SMS messages.
• With the Short Messaging Service, a user can
send text message containing up to 160 char-
acters to and from GSM mobile stations.
A Service Centre (SC) acts as a storage and for-
warding centre.
SMS consists of two basic services:
• Mobile Orientated SMS (from a mobile station
to an SMS-C)
• Mobile Terminated SMS (from an SMS-C to a
mobile station)
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
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 involves pre-
setting 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.
Restricted calls allows outgoing or incoming calls
in certain situations, for example international
calls to be blocked