looking at the plantronics site was useless and the link to the faq was ungodly huge, so i am just c&ping
What devices should be listed in the Device Manager of my Computer?
The drivers required for your Plantronics USB headset should load automatically - no software required. The follwing drivers should appear in your Device Manager:
Under Human Interface Devices:
HID-compliant consumer control device
USB Human Interface Device
Under Sound, Video, and Game Controllers:
USB Audio Device
After you plug in your headset, you should also find "Bulk Driver” or “Plantronics Headset” or “USB/Audio Adapter"
To Locate the Device Manager:
Windows Vista or 7: Click Start, and then click Control Panel. Double-click the System icon, and then click Device Manager on the left hand side of the screen.
Windows 2000 and XP: Click Start, Settings, and then click Control Panel. Double-click the System icon. Click the Hardware tab, and then click the Device Manager button.
True, Plantronic website is useless. When i pluged in the usb, my headset got power light turned on but in device manager it say unknown device. I tried update driver it say u got the latest. Seems nothing much can do on this. Btw thanks for the reply.