We have 8G20G4-48P switches that no longer power the telephone equipment and cameras of our company.
When I click on "POE Port Settings" or "POE System Settings", I can not find any configuration.
I just relized that I misread the switch type... I am not sure what that is.
if it is an XOS switch :
most likely the POE backplane has failed.
when you can disrupt service
run a command - Run diagnostics extended
once it has finished and the switch has rebooted
if it shows failed - call extreme - they will replace it.