Patent ID: 6724874
Filing Date: 2004-04-20
Classification: H04M,H04Q

Abstract:
A method for restricting destinations that a telephone call from a calling station can reach, the calling station subscribing to an abbreviated dialing plan and attempting to call a destination at a called number, at least one privilege class being assigned to the calling station, the method comprising:ascertaining the assigned privilege class of the calling station; associating at least one blocking table with each privilege class, each blocking table having a blocking table type; determining whether the telephone call corresponds to one of the blocking table types; when a telephone call correspondence exists, determining whether the assigned privilege class corresponds to the blocking table corresponding to the telephone call; when a privilege class correspondence does not exist, bypassing validation of the called number; and when the privilege class correspondence exists, validating the dialed telephone number, and either blocking the call when the called number is validated or continuing call processing when the called number is not validated; wherein the blocking tables are enabled based on privilege classes.