This enables the subscriber to automatically block calls from people who have their phone number marked as "Private." When activated, all callers that have numbers marked as private are sent to an announcement instead of ringing in.
This feature causes all phone calls to the subscriber to receive an announcement stating that the line does not accept calls from Telemarketers and the caller must press 1 to be connected. If the caller presses 1, the call is completed and rings normally. If the caller enters any other digit, the caller receives a busy tone.