I'm so close ...
Worked my way through the Cisco documentation and have Attendant console almost operational. The only thing that doesn't work is the display of parked calls.
When a call is handled from the AC and parked, it doesn't seem to show in the Parked Call window. However, if it is retrieved and parked from the deskset, it does show in the window.
I'm aware of the settings needed to allow parked call monitoring, and have checked that.
Anybody have any ideas?