Automatic updating of a local database supporting local number portability

Abstract From the Canadian patent

In accordance with the teachings of a prior application in a telecommunicationsnetwork, a local database stores destination telephone number information derived from a more global database, shared by a plurality of switching systems usually remote from all or most of the systems. One or more bit maps are used to store key indicators for each telephone number for which information may be required. Thisinvention relates to a method and apparatus for automatically updating the localdatabase by recognizing that a switch identified as serving a directory number does not have access to the line corresponding to that number; when this condition isdiscovered the global database is increased and the …