Patent ID: 6956930

Claim:
In a telephonic communication system permitting of a call, originated at a calling station, to be placed to a selected public safety answering point of a set of public safety answering points by way of a call routing entity of a set of call routing entities, an improvement of apparatus for facilitating service handling of the call to the selected public safety answering point together with providing selected information pertaining to the calling station to the selected public safety answering point, said apparatus comprising: a centralized routing data base maintainable in communication connectivity with each call routing entity of the set of call routing entities, said centralized routing data base containing a listing indexing together a calling-station identity of the calling station and a public safety identity of at least one of the public safety access points, said centralized routing data base accessed by the call routing entity by way of which the call is placed at least to identify the selected public safety answering point to which to route the call, the selected public safety answering point comprising the public safety answering point indexed together with the calling station; and a signaling transfer point (STP) having the centralized routing database at the STP, wherein the STP directly accesses the centralized routing data base, wherein the centralized routing data base is maintained in communication connectivity with each call routing entity by way of the STP, and wherein the information of the centralized routing data base is updated by way of the signaling transfer point.