I would like to be able to have the abilty to set permissions for blocking/accepting incoming telephony calls to groups or user's - possibly with some rules in place.

Example:

1. Allow/Deny a group/user to receive only Toll-Free or local calls ['Receive Toll-Free Numbers permission]
2. Allow/Deny a group/user to receive only internal extension. [Receive Internal Numbers permission]
3. Allow/Deny a group/user to receive any incoming telephone calls [Deny Incoming Telephony Calls]
4. Restricted Incoming caller would receive a voice message from the system with the ability for Admins to record a message to replace the default message.
5. Or the option to forward restricted calls to a number (ex: hospital main number/ operator)