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White Paper T610/612
27
for example:
• Constant connection
• Keep an open connection to an e-mail system or the
company network, staying online to receive and send
messages at all times. All connection settings can be
managed by using the data connections feature.
• High speed
• Gain access automatically to increased bandwidth
when downloading large files, images etc.
• Cost efficient
• Use transmission capacity only when needed, thus
reducing costs.
• WAP over GPRS
• Access the Internet via WAP at high speed and with a
constant connection.
• E-mail over GPRS
• Remain connected to an e-mail system while reading
and preparing messages, (which are sent at a high
speed).
• Data communication
• Transfer data and access the Internet or an intranet
with a PC, PDA or handheld device connected via
Bluetooth wireless technology, infrared or cable.
• Data and voice
• Maintain a data connection, for example, a constant
connection to an e-mail system when conducting a
voice call.
• Provide settings
• Receive GPRS configuration settings from the pro-
vider over the air, OTA, making manual configura-
tion unnecessary.
• User controlled settings
• Take advantage of full user control in the data con-
nections menu, establishing multiple descriptions and
accessing advanced settings for GPRS.
Interruption of GPRS data account
When the user is browsing with a T610/612 the GPRS
connection will be automatically disconnected when an
incoming call is received. This is the default behaviour.
However, it is possible for operators to customize the
phone in such a way as to ensure that the user is asked if
they wish to remain connected when an incoming call is
received.
Modem and AT commands
The T610/612 contains a complete GSM/GPRS modem.
This provides data and e-mail communication, as well as
Internet/intranet access, for a connected PC, PDA or
handheld device. Once the PC/PDA is connected to the
phone using a cable, Bluetooth wireless technology or
infrared, and the appropriate software is installed, the
modem in the phone works in a similar way to a PC Card
modem, or an external modem.
In the T610/612, AT commands are used for:
• controlling the data communication between the PC
and the remote service
• configuring and requesting settings and behaviours in
the phone, from a connected PC or PDA
GSM data communication
The built-in data capability turns the phone into a modem
when connected to a PC/PDA. The T610/612 offers the
user data connection anytime, anywhere, unmatched by
fixed telephone networks. Each GSM channel is divided
into eight repeating time slots. A normal GSM voice or
data call is circuit switched, and only one time slot is
used for each call. The data speed is therefore limited to
9,600 bps.
High Speed Data gives a faster speed
High Speed Data (HSCSD) increases speeds for circuit
switched data by allowing the phone to use a coding
scheme with a high capacity, and to use two time slots for
receiving data. The download speed is increased to up to
28,800 bps. The speed for sending data is limited to
14,400 bps. The data rate can be increased several times
by the use of rate adaption, interworking with ISDN.
This also provides additional features, such as quick call
set-up capability.