Fujitsu S7211 manual Troubleshooting the Wlan, Unavailable, Network, Connection

L i f e B o o k S 7 0 0 0 N o t e b o o k

Troubleshooting the WLAN

TROUBLESHOOTING

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 (See Configuring the WLAN Using Windows Vista on page 91 for
		more information). Please consult your network administrator for this
		value, if necessary.
	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.
	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.
	or disabled
	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 91.
	Incorrect IP address	This only applies to networks using static IP addresses. Please contact
	configuration	your network administrator for the correct settings.

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