Simple Definition of Simple Feature Class?

[davidshq]

Can someone give me a lay english, common sense definition of Service Feature Class? If I'm understanding correctly, the PBX includes a number of "service features" which one can enable on a route by route basis?
Dave.

 

[belevedere]

Service Feature Class is a group of station user features that can be allowed or restricted by class by user. EX: you might want to restrict one station from setting call forward to their cell phone. While other can.