Do you know which modem you have? Verify that the Product Number (#) on the bottom of the modem is 64-005686-05R (NOTE: Model E). If the code is 64-005686-06R (NOTE: Model G) go to the USR5686G support page.
You may use our automated utility to update your modem. Your Installation CD-ROM has ControlCenter. If you do not have your Installation CD-ROM, you can download ControlCenter below. ControlCenter will guide you through the update process.