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 network
connection
Incorrect Network name (SSID
or network key
Ad hoc connection: verify that the network names (SSID’s) and
network keys (WEP) of all computers to be connected have been
configured 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.
Weak received signal strength
and/or link quality
Ad hoc connection: Retry connection after shortening the distance
to the destination computer or removing any obstacles for better
sight.
Access Point (Infrastructure) connection: Retry connection after
shortening the distance to the access point or removing any
obstacles for better sight.
The WLAN device was
deactivated or is disables
Check if the wireless switch is turned On. Go to Start > Control Panel,
and double-click on Windows Mobility Center. If the wireless network
is off, click the [Turn wireless on] button.
The computer to be connected
is turned off
Check if the computer to be connected is turned ON.
Incorrectly configured network
settings
Recheck the configuration of your network settings
Unavailable network
connection
RF interference from Access
Points or other wireless
networks
The use of identical or overlapping RF channels can cause
interference with the operation of the WLAN device. Change the
channel of your Access Point to a channel that does not overlap
with the interfering device.
Wireless network authentication
has failed
Re-check your Network Authentication, Encryption, and Security
settings. Incorrectly configured security settings such as an
incorrectly typed WEP key, a misconfigured LEAP username, or an
incorrectly chosen authentication method will cause the LAN device
to associate but not authenticate to the wireless network.
Incorrect IP address
configuration
This only applies to networks using static IP addresses. Please
contact your network administrator for the correct settings.
Appendix 156
