There is not a "great" case for it. Maybe a good case. I got 2 service requests this week for two different customers that claimed they were not getting incoming calls. It is not a problem for me to call them and ask them to look at their display to see if it says DND but it would work out better if I could see remotely if DND was active. If it is not, I can start troubleshooting other things before I call the customer. You can see in the configuration if someone activated the CFA button on their phone. You would think DND would work like that.
Configure Multicast Paging on the Cisco IP Phone 7800 Series or 8800 Series Multiplatform Phone
The Cisco IP Phone 7800 and 8800 Series Multiplatform Phones provide voice communication over an Internet Protocol (IP) network...
Add Call Park on a Cisco 7800 or 8800 Series Multiplatform Phone Key Expansion Module
Call park allows the user of the phone to put an incoming call on hold so that the call can be retrieved on another phone. A call is park...