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T300/T302
White Paper, August 2002
25
Infrared
transceiver
Infrared communication creates a data link
between two communications devices through an
infrared beam of light. On the T300/T302, this link
is used to connect with desktop computers,
PDAs, Sony Ericsson handheld computers,
laptop PCs, other phones (for example, the T39),
and other hardware supporting the standard. The
Infrared Data Association (IrDA) has set the
hardware and software standards that form the
infrared communication links. The T300/T302
complies with the IrMC 1.1 specification, which
defines how mobile telephony and
communication devices can exchange
information. Key benefits of using the T300/T302
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 e-mail and data
on the connected PC/PDA
• Ability to connect to the Internet or intra-
net/LAN from the connected PC/PDA
• Ability to manage the phone book from a
PC
• Exchange of business cards with vCard
compatible devices
• Exchange of ring signals between compati-
ble phones
• Ability to attach a photo from a digital cam-
era in outgoing e-mail
Connection via infrared
IrDA 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 exchange data. For
optimal performance, place the T300/T302 within
a metre and at an angle of 30 degrees to the
infrared port on the PC/PDA, or other phone. An
advantage of the necessary 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 protocol 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, sunlight and electromagnetic
fields — making it suitable for the modern office
environment.