User's Manual

51
Wireless LAN User’s Guide
connection could fail. This is because all wireless LAN
cards are using the same radio frequency in the network.
To improve this situation, you can use a wireless LAN
access point, which is sold separately. The wireless LAN
network is in the “Access Point mode” when it uses an
access point, and such a connection is called the “Access
Point Network” or “Infrastructure Network”.
By using an access point, you can set and use a different
communication channel for each network group. Each
channel is given a different radio frequency, and it
eliminates the collision of communications and provides
a more stable communications environment.
How to Handle This Device
The Integrated Wireless LAN device is already installed in
your mobile computer. Under normal circumstances, it
should not be necessary for you to remove or re-install it.
The LAN has been configured to support the operating
system with which your system shipped.
FOR BETTER COMMUNICATIONS
This personal computer may not operate properly due to
the operating environment. Strictly observe the following
precautions when installing the main unit of the
computer:
■
The recommended wireless communications distance
is within a line-of-sight radius of 25 meters. For rea-
sons related to the characteristics of the wireless LAN,
however, the actual communications distance depends
on the structure of the building in which the wireless
LAN function is to be used, the presence/absence of
obstructions, the types of software to be used, installa-
tion status, radio-wave status, or other operating con-
ditions. Decreases in communications speed or a
communications failure may also occur.
■
Distance the main unit of this personal computer is
from other electric appliances. If the main unit of the
person computer is installed near a powered-on electric
appliance, the computer may not be able to communi-
cate properly or trouble may occur in the electric appli-
ance.
■
If the computer is unable to communicate properly,
change the channel to be used or the installation loca-
tion. During the use of a microwave oven or other
equipment generating strong high-frequency energy, in
particular, the personal computer may be highly sus-
ceptible to the energy and unable to communicate
properly.
■
If a broadcasting station or wireless communications
equipment is present nearby and this prevents the com-
puter from communicating properly, moving the main
unit of the computer is suggested. Radio interference
may also occur if the intensity of ambient radio waves
is too high.
Figure 2. Access Point (Infrastructure) Mode Network
Internet
ADSL modem,
cable modem,
or similar
Wired LAN
Wireless LAN
Access Point*
* An optional hub for a wired
LAN may be required depending
upon the type of access point used.
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