White Paper
J200
19
November 2004
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 J200 within 20-30 cm and
in direct line with the infrared port on the other
device. An advantage of the proximity of devices is
reduced risk of transmitting data to other devices
nearby. 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
should not be affected by standard fluorescent light
and electromagnetic fields – making it suitable for
the modern office environment. However strong
sunlight may affect the connection.
Infrared transceiver technical data
Messaging
Today a large number of text messages are sent
worldwide between mobile phones. The consum-
ers’ needs to express themselves in ways beyond
voice, were highly underestimated by the industry
when SMS was introduced in the late 90s. The suc-
cess of SMS, however, is the springboard for exist-
ing other messaging services, such as Enhanced
Messaging Service (EMS). The added value in SMS
messaging will create new revenue that can be
shared between the network operators, the appli-
cation aggregators and the content providers.
EMS (Enhanced Messaging Service)
EMS uses existing SMS infrastructure and industry
standards, keeping investments to a minimum for
operators and providing a familiar user interface
and compatibility with existing phones.
Sounds and melodies
EMS gives the user the ability to send and receive
melodies. These melodies can be pre-defined
sounds, sounds downloaded from the Internet,
sounds received in SMS messages or sounds com-
posed by the user on the phone keypad or a PC.
Several sounds and melodies can be inserted in
one message, and they can be combined with pic-
tures.
IrDA standard
1.2
Data rates
9.6 to 115.2 kbps
Maximum distance to receiver 30 cm
Supported protocols
OBEX, IrLAP, IrTinyTP, IrLMP
