User's Manual

53
Wireless LAN User’s Guide
Access Point (Infrastructure) Mode (See Figure A-2)
If a number of computers are connected simultaneously
in the Ad Hoc mode, the transfer rate may be reduced,
communications may become unstable, or the network
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 Wireless Module
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 wireless 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. It is highly recommended
that you observe the following precautions when using
your wireless LAN module:
■
For optimum wireless communications, it recom-
mended that operation of the wireless LAN module
occur within 25 meters of the Access Point. Wireless
range is dependent on a multitude of factors including
number of obstructions, walls, type of construction
material, reflective objects, etc.
■
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.
■
Broadcast stations or wireless communication equip-
ment that operate in the 2.4GHz or 5GHz RF Fre-
quency band may interfere with the operation of the
wireless LAN module. Increasing of transmit power or
relocating Access Points may be necessary to combat
the effects of the interference.
Figure A-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.