Covered in a previous post, but saw this out on the web...
For WillVmk
WEB [sic] encryption works with Dell TrueMobile 1150
April 24, 2001
Jim Hines
You can report to your readers that WEP encryption works with the Dell TrueMobile 1150.
Thanks to Rus Maxham's April 16th report I took a chance at ruining my working wireless network and utilized the network equivalent password in the Airport 1.3 administration utility (Menu/toolbar).
Checked the enable WEP encryption check box, applied a new password, reestablished my connection to the network via the airport control panel, set the network equivalent password in the Dell TrueMobile Client Manager and it was done. It took me longer to type this letter.
There are those who say WEP encryption is tantamount to a placebo but hey, it's my placebo.
More on using the Dell TrueMobile 1150
September 4, 2001
Lance Lichtor
I thought I would share my final success in getting a Dell Latitude [notebook] with TrueMobile 1150 (Windows 2000) to link up to the Internet using an Airport Base Station. Before I go on, the person at Dell with whom I spoke said that this could not be done. Nonetheless, I finally found the MacWindows Cross-platform AirPort special report page, and knew there was some hope.
Based on what was in this article, I disabled encryption on the Mac side (although I did set up a closed network). When I did this, on the PC side, I saw that there was a radio connection, but I could not get my browser to connect to the Internet. Finally, when I selected start->settings->network and dialup connections->local area connection-> and then double clicked on Internet Protocol (TCP/IP), and selected "obtain an IP address automatically" and "obtain DNS server address automatically", voilà