[Nebula]What does the "Upgrade available" means in firmware management?

Zyxel_Cooldia

Question
What does the "Upgrade available" means in Firmware management?

Answer
When your device have a newer firmware available and per device type schedule is selected, the administrators will receive an email notification 14 days in advance.
The Nebula portal will display the next upcoming schedule based on your settings.
You can choose upgrade now, reschedule or ignore upgrade if you don't want to upgrade.
If no action is taken, the upgrade will be performed as shown in the defined schedule.