Get-CSWindowsService
Below is a screen shot of the output of the commad with no other paramaters.
To get the full details of the activity level for the Mediation Service you can run
Get-CsWindowsService -Name RTCMEDSRV | Select-Object -ExpandProperty ActivityLevelThis will give the below output.
There is bound to be a better way to get the details, but i found this today and thought it might be useful.