I have Windows 2000 with Active Directory installed. How do I setup the Complete 4000 to use Windows 2000 authentication? Do I need to install a Radius server?

Yes, you must install a Radius server. Win2K server has a built in Radius Server called IAS, this is compatible with our CC4000 RAS server. A document on how to setup our RAS server to work with IAS can be found at:

http://www.multitech.com/en_US/DOCUMENTS/Collateral/manuals/S000267A.pdf