Irda - Sony Ericsson D750i White Paper

IrDA

IrDA (Infrared Data Association) is a point-to-point
communication link between two infrared ports.
The infrared beam has to be directed towards the
target infrared port and as long as the two infrared
ports are within sight and range, the devices can
exchange data. For optimal performance, place the
phone within 20 centimetres and at an angle of
max 30 degrees to the infrared port on the compu-
ter/PDA, or other phone. An advantage of the nec-
essary proximity of devices is reduced risk of
transmitting data to other nearby devices.
An infrared link is a serial connection, which means
that data bits are sent one after another in a long
stream. The IrDA–SIR Data Link Standard is a pro-
tocol that makes transmission of data faultless. The
standard provides a high level of noise immunity,
which means that the connection is not affected by
fluorescent light and electromagnetic fields – mak-
ing it suitable for the modern office environment.
Object Exchange via infrared (IrObex) supports
transferring objects between compatible phones
and computers. These objects are not only limited
to ring signals, but even pictures, bookmarks and
other files in the file system.
Key benefits of using the phone with its built-in
infrared transceiver:
• True wireless communication
• Low power consumption
• Secure data transmission with the IrDA DATA
standard
• Ability to send and receive email and data on
the connected computer/PDA
• Ability to connect to the Internet from the con-
nected computer/PDA
• Ability to synchronize the phone book from a
computer
• Exchange of business cards and calendar
events with vCard/vCalendar compatible
devices
• Exchange of ringtones and other files between
compatible phones
• Ability to attach a photo from a digital camera in
outgoing email
• Ability to send and exchange notes with vNote
compability devices
Connection via cable
The infrared connection is not always the best
solution when connecting to a computer/PDA.
Indeed, it is not always even possible. The USB
cable provides connectivity between the phone
and a computer and is included in the phone kit.
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White Paper D750i
March 2005