Sony Ericsson J200 manual Messaging, Connection via infrared, Infrared transceiver technical data

White Paper J200

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

IrDA standard	1.2
Data rates	9.6 to 115.2 kbps
Maximum distance to receiver	30 cm
Supported protocols	OBEX, IrLAP, IrTinyTP, IrLMP

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.

19 November 2004