L i f e B o o k T 4 2 0 0 S e r i e s T a b l e t P C - A p p e n d i x A

Troubleshooting the WLAN

Causes and countermeasures for troubles you may encounter while using your wireless LAN are described in the following table.

Problem

Possible Cause

Possible Solution

 

 

 

 

 

 

Unavailable

Incorrect network

Ad hoc connection: verify that the network names (SSID’s) and network

network

name (SSID) or

keys (WEP) of all computers to be connected have been configured

connection

network key

correctly. SSID’s and WEP key values must be identical on each machine.

 

 

Access Point (Infrastructure) connection: set the network name (SSID)

 

 

and network key to the same values as those of the access point.

 

 

Set the Network Authentication value identically to that of the Access

 

 

Point. Please consult your network administrator for this value, if

 

 

necessary.

 

 

For the method of setting network authentication, refer to the section of

 

 

this chapter related to the configuration tool or utility you are using.·

 

 

 

 

Weak received signal

Ad hoc connection: Retry connection after shortening the distance to

 

strength and/or link

the destination computer or removing any obstacles for better sight.

 

quality

Access Point (Infrastructure) connection: Retry connection after short-

 

 

 

 

ening the distance to the access point or removing any obstacles for

 

 

better sight.

 

 

(See Confirming connection on page 103 for more information).

 

 

 

 

The WLAN device

Check if the wireless switch is turned ON. Also verify “Disable Radio” is

 

has been deactivated

not checked in “Network setting” window. (See Activating the WLAN

 

or disabled

Device on page 96 for more information).

 

 

 

 

The computer to be

Check if the computer to be connected is turned ON.

 

connected is turned

 

 

off

 

 

 

 

 

RF interference from

The use of identical or overlapping RF channels can cause interference

 

Access Points or

with the operation of the WLAN device. Change the channel of your

 

other wireless

Access Point to a channel that does not overlap with the interfering

 

networks

device.

 

 

 

 

Wireless network

Re-check your Network Authentication, Encryption, and Security

 

authentication has

settings. Incorrectly configured security settings such as an incorrectly

 

failed

typed WEP key, a mis-configured LEAP username, or an incorrectly

 

 

chosen authentication method will cause the LAN device to associate

 

 

but not authenticate to the wireless network.

 

 

 

 

Incorrectly

Recheck the configuration of your network settings.

 

configured network

For the method of checking, refer to the following page:·“Connection to

 

settings

 

the Network” on page 101.

 

 

 

 

 

 

Incorrect IP address

This only applies to networks using static IP addresses. Please contact

 

configuration

your network administrator for the correct settings.

 

 

 

104

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Fujitsu T4210, T4215 manual Troubleshooting the Wlan, Unavailable, Network

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