The Echelon LonTalk PCC-10 PCMCIA Network Adapter Will not work with a Dell E6400 laptop
Dell E6400 Chipset
Go to the Dell website and upgrade your laptops chipset to the latest version from the dell drivers and downloads section.
The file download is a self extracting file, follow the instruction provided and when you re-boot your computer your LonTalk PCC-1 PCMCIA Network Adapter should be fully functional.
For further information see TPA-SACH-10-0008.00 - LON PCC-10 PCMCIA Card with Dell E6400 Laptop