Administration of Cisco Headsets is possible in Call Manager. It gives the possibility to apply a specific Firmware Version or to apply specific settings. But for the DropDown of the Firmware Version it is only possible to choose between "Remain on current version" or "Latest (Version uploaded to CUCM)".
It should be possible to apply more than one Firmware Version to CUCM, so that it would be possible to choose between several Firmware Versions in the DropDown.
It would enable to have different Headset templates with different Firmware Versions. That would f.e. give a chance to test the new firmware in a headset template, which is assigned only a few test users or easy switch back to a older Firmware Version when there are problems with the new one (based on a headset model).