Ericsson R320s White Paper page 19

P P P P r r r r i i i i o o o o r r r r i i i i t t t t i i i i e e e e s s s s i i i i n n n n c c c c o o o o m m m m m m m m u u u u n n n n i i i i c c c c a a a a t t t t i i i i o o o o n n n n
There is a prioritisation between the different ways of communicating. The WAP browser
has the highest priority, the DRS-10 (RS-232) cable has the second highest, and the infrared
link has the lowest priority. When the WAP browser is used, both the cable and the infrared
link are disabled. When the cable is used, the infrared link is disabled. The infrared link can
only be used when none of the cable or the WAP browser are used.
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Priority
1. WAP browser
2. DRS-10 cable
3. Infrared
Figure 5. Priorities in communication in the Ericsson R320s
C C C C o o o o n n n n n n n n e e e e c c c c t t t t i i i i o o o o n n n n v v v v i i i i a a a a i i i i n n n n f f f f r r r r a a a a r r r r e e e e d d d d
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
R320s within the range of a metre and at a 30 degree angle from the infrared port on the PC/
PDA, or other phone. One advantage of this narrow infrared gap is that the risk of transmitting
data to other devices nearby is minimized. The infrared link is a serial connection, which means
that the data bits are sent one after another in a long stream. The IrDAÐSIR Data Link Standard
is a protocol that makes transmission of data faultless. The IrDAÐSIR standard provides a high
level of noise immunity, which means that it is not sensitive to ßuorescent light, sunlight and
electromagnetic Þelds. This makes it suitable for a modern ofÞce environment.
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