The upgrade has been tested with characteristic devices; see Testing the Upgrade.
UMS 6.01.130 or higher is available.
The firmware IGEL OS 10.05.700 or 10.05.800 is known to the UMS. For this purpose, a device with OS 10.05.700 or 10.05.800 must be registered in the UMS. This is already the case if you tested the upgrade (see Testing the Upgrade) with the same UMS with which you are about to do the mass upgrade. If not, you must register a device with OS 10.05.700 or 10.05.800 now.
All devices are connected to a regular LAN (not OpenVPN, OpenConnect, genucard, NCP VPN or mobile broadband).
All devices are in a safe environment where the upgrade process cannot be disrupted, e.g. by powering off the devices.