3Com 6000 User Manual page 59

Symptom
PC Card installs as an
unknown device.
Installation program does not
finish. The driver fails to load.
Network association is
intermittent.
In the WLAN Launcher
window, the green dotted line
between associated devices
blinks to red with an X,
indicating that the radio signal
is weak.
The diagnostic signal strength
or link quality tests fail.
Computer operating system
does not recognize the card.
In the WLAN Launcher
window, you see a yellow X on
the client icon.
The diagnostic adapter
presence test fails.
Client cannot associate with an
access point.
In the WLAN Launcher
window, you see a red dotted
line with an X.
Diagnostic network connection
test fails.
There is no network association
when the computer becomes
active again after being in
sleep mode or after the PC
Card is removed and
reinserted.
Client cannot communicate
with the network.
Client is not working under
Windows NT.
Solutions
The Windows Add Hardware Wizard was unable to locate the
PC Card drivers. You may have had no CD or the wrong CD
inserted in the drive, or the 3Com CD may not have been
ready when the wizard looked for the drivers.
Remove the unknown device and repeat the installation
procedure. Make sure that you insert the 3Com CD when the
installation calls for it and that you wait for it to come up to
speed in the drive.
There may be a resource conflict. Use the Device Manager to
resolve resource conflicts. Select System from the Control
Panel, and then click the Device Manager tab.
Make sure that the XJACK antenna attached to the end of
the card is extended. Try reorienting the antenna. For best
use of the antenna:
Keep the area around the antenna clear from materials
I
that could block radio transmission, such as metal objects,
electronic devices, and cordless telephones.
If the signal is weak, change the direction of the antenna
I
slightly.
If necessary, move your computer a few inches to find a
I
better signal.
Make sure the card is properly inserted in the slot.
Make sure that PCMCIA support is installed.
Check whether a card is already in use.
Windows 95, Windows 98, Windows Millennium Edition
(Windows Me), and Windows 2000: Check whether the
computer has a Plug and Play BIOS.
Windows NT: Make sure that CardWizard is installed on your
computer and that you have removed any utility that is similar
to CardWizard.
Click the Padlock icon to display Security/Network settings.
Make sure that the WLAN Service Area set on the client
matches that set on the access point. Or, set the client to
Attach to any WLAN Service Area.
Make sure that encryption is set up correctly and matches
security set on the access point. See "Changing Network and
Security Settings" on page 43 and "40-bit Shared Key (Wi-Fi)
Encryption Settings" on page 44.
If you are associating with a 3Com AirConnect
make sure that the Short RF Preamble parameter is disabled
on both access points.
Log out and log in again, or restart the computer to restore
the connections.
Make sure that fixed IP settings are correct.
If you are connecting to a wired network, make sure that the
access point you are associated with is connected to the
wired network.
If you are using a DHCP server, release/renew the IP address.
Make sure that CardWizard is installed and that any utilities
similar to CardWizard are not installed.
Diagnosing Problems 53
®
access point,