AirCard 555 Network Card User Guide
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Reinstalling the AirCard Driver
Note: You must have the
AirCard installation CD to
complete this procedure.
There is an AirCard driver for each supported Windows
operating system. Unless the appropriate driver for your
version of Windows is installed, you will not be able to
establish a network connection with the AirCard. This section
provides instructions on verifying that you have the correct
AirCard driver installed.
Windows 95/98
To verify that the correct driver is installed:
• Locate the existing driver
• Replace the driver with the Windows 95 or Windows 98
driver from the AirCard installation CD.
Locating the Existing Driver
1. Close all Windows programs and open the Control Panel
by selecting
Start > Settings > Contol Panel.
2. Double click the System icon.
3. Click the Device Manager tab.
4. Locate the AirCard entries by using the “+” signs to
expand the listings. (I.e. to see all the installed modems,
click the “+” sign to the left of
Modems.) The AirCard
should have 3 entries:
1 The AirCard should display under Multifunction adapters
as
Sierra Wireless AirCard 555 PC Card Parent.
Windows 2000 and XP:
When attempting an
Express Network
connection, the
connection gets
dropped as soon as
it is established
(when you click
Connect, the status
goes from
"Authenticating" and
"Authenticated" back
to "Ready to
Connect").
The connection properties are not
optimal.
1. Windows XP: Click Start > Connect To
> Express Network (1xRTT).
Windows 2000: Click Start > Settings
> Network and Dial-Up Connections >
Express Network (1xRTT).
2. In the window that appears, click
Properties.
3. Click the Networking tab.
4. Click Settings.
5. Ensure that Enable LCP Extensions
and Negotiate multi-link for single link
connections are not selected.
6. Click OK.
Table 9-1: Problem Causes and Suggestions
Problem Possible Causes Suggestions
