89
W I r e l e s s L A N U s e r ’ s G u i d e
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 oper-
ating 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:
■
Since this personal computer and equipment compli-
ant with IEEE802.11a differ in operation frequency, it
is not possible to communicate between both.
■
The maximum communication range is approxi-
mately 80 feet (25 meters) inside of a building. Please
note that the range you achieve may be longer or
shorter than 80 feet. Wireless LAN range is affected by
such factors as obstructions, walls, type of construc-
tion material, reflective objects, etc. A professionally
performed site survey is highly recommended when
determining optimal access point placement.
■
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 elec-
tric appliance, the computer may not be able to com-
municate properly or trouble may occur in the electric
appliance.
■
If the computer is unable to communicate properly,
change the channel to be used or the installation loca-
tion. Microwave ovens and other equipment that gen-
erates strong, high-frequency energy, may interfere
with the operation of the wireless LAN radio. The con-
sequences of this interference include degraded com-
munications speeds, dropped data packets, and
corrupted data.
■
If a broadcasting station or wireless communications
equipment is present nearby and this prevents the
computer from communicating properly, moving the
main unit of the computer is suggested. Radio inter-
ference 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.
cygnus.book Page 89 Tuesday, September 30, 2003 4:22 PM
Summary of Contents for Lifebook N-5010
Page 7: ...1 1 Preface cygnus book Page 1 Tuesday September 30 2003 4 22 PM ...
Page 27: ...21 3 Getting Started cygnus book Page 21 Tuesday September 30 2003 4 22 PM ...
Page 37: ...31 4 User Installable Features cygnus book Page 31 Tuesday September 30 2003 4 22 PM ...
Page 53: ...47 5 Troubleshooting cygnus book Page 47 Tuesday September 30 2003 4 22 PM ...
Page 65: ...59 T r o u b l e s h o o t i n g cygnus book Page 59 Tuesday September 30 2003 4 22 PM ...
Page 69: ...63 6 Care and Maintenance cygnus book Page 63 Tuesday September 30 2003 4 22 PM ...
Page 75: ...69 7 Specifications cygnus book Page 69 Tuesday September 30 2003 4 22 PM ...
Page 81: ...75 8 Glossary cygnus book Page 75 Tuesday September 30 2003 4 22 PM ...
Page 113: ...107 Index cygnus book Page 107 Tuesday September 30 2003 4 22 PM ...