UNCLEBUD: yes, you have to load the software, see immortalis's links just above. Once you have the software installed, the light on the base unit will change from amber to green. The software also has all of the drivers for the base unit. Once you have it operational with the computer on, when the computer is turned off it reverts back to a standard cordless phone system.
If anyone's interested, I also have an unopened base unit that I'll let go for the same price as rickforrest. Just PM me.