US Robotics USR3520 User Manual page 144

You will then see an overview of all the available 'Firmware'
Managing Radio Firmware
Radio firmware is firmware for the radio module in the USR3520 devices.
Note: Releases of Radio firmware are uploaded by USRobotics. You cannot upload or download
versions of the radio firmware from the USR Universe.
Revision: 1.00 Copyright 2015 U.S. Robotics Corporation 144 | P a g e