GLOBAL MANAGEMENT OF TELEPHONE DIRECTORY

摘要

A method of maintaining directory data in a switching system network having plural switching systems and a centralized directory data management system is comprised of of storing local directory data at each switching system, storing a copy of directory data of all the switching systems at the management system, associating directory data entries of the directory data stored at the management system with groups of switching systems, and downloading data entries associated with each group to the switching systems designated in that group.