The application has monitor privileges to the call. These privileges
allow the application to monitor state changes and query information
and status about the call.
LINECALLPRIVILEGE_NONE
The application has no privileges to the call. The application's
handle is void and should not be used.
LINECALLPRIVILEGE_OWNER
The application has owner privileges to the call. These privileges
allow the application to manipulate the call in ways that affect
the state of the call.