70
Ericsson Mobile Phone, now fits into a small device attached to the mobile phone. Two major
advantages of the Ericsson Infrared Modem are its low power consumption and compact size.
10.4.1 Contents of Ericsson Infrared Modem
The Ericsson Infrared Modem consists of three parts: the data plug that connects to the mobile
phone’s system connector, the built-in GSM modem, and the IrDA-compatible infrared port that
replaces the cable found on other GSM modem solutions. Since it uses the IrDA-SIR protocol to
communicate, it is compatible with all devices equipped with IrDA-compatible IR ports.
10.4.2Power consumption
When using the Ericsson Mobile Phone with the Ericsson Infrared Modem attached the power
consumption increases by about 10%.
10.4.3 Size
The Ericsson Infrared Modem adaptor is so small (23x46x14 mm) and light (9.7 grams) that it
does not interfere with an Ericsson Mobile Phone’s flip, nor with audio performance or
functionality.
10.4.4Infrared Port
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 can exchange data. For the best performance, place the Ericsson
Mobile Phone with the Ericsson Infrared Modem attached range of a metre and at a 30
°
angle
from the Ericsson Mobile Companion’s Infrared Port. One advantage of this Infrared gap is that
the risk of transmitting data to other devices nearby is minimized.
10.4.5 Connection
The infrared link is a serial connection, which means that the 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 IrDA-SIR standard provides a high level of noise immunity, which means that it is
not sensitive to fluorescent light, sunlight and electromagnetic fields. This makes it suitable for a
modern office environment.
10.5 IrDA – Infrared Data Association
In 1993, a group of companies founded theInfrared Data Association (IrDA). As a leading high
technology standards association, IrDA is committed to developing and promoting infrared
standards for the hardware, software, systems, components, peripherals, communications, and
consumer markets and Ericsson is one of more than 160 organizations in the IrDA.
More information can be found at
http://www.IrDA.org
.
1m
30
°