ETS allows a device to be unloaded only when the download button on the device is also pressed. This prevents the unloading of a PA/IA when the device is no longer physically accessible (e.g. after mounting in a suspended ceiling). This would mean that no new PA/IA could be assigned because to do this, the download button must be pressed.
In the special case of Training Centers, mass unloading after completion of a course is a desired use case so that the installation can be restored to the initial condition.
•Serves to quickly unload devices, including the associated PA/IAs, in an entire line (one-click unload).