There is no "even though" it is a per user license allowed to be used by that user on XX devices.
The point of this is simply easier maintenance if it actually fails.
The server is still down. You are SoL there. But you can simply pull and swap the power supply once you get it delivered.
It is typically very easy to slide out a powersupply in most any rack and put in the new one.
All our Yealink phones have a blinking red light on the top to indicate the missed call, and it shows on the screen
yes, this would drive my users insane.
It is a setting. Turn it off.
On Screen notice