Call processing digit translation and characterization

Abstract

An optimal digit translation and call processing system and method is provided. A prefix translation and digit characterization process are performed utilizing a digit prefix table and a second table interfaced therewith. The digit prefix table contains numerous records corresponding to prefixes of dialed digit streams. Each record includes an index to a record of a second table operable to output a termination type of the digit stream. The second table includes numerous records associated with various call termination types. Each index included within respective records of the digit prefix table may reference more than one record of the second table. The digit stream length is analyzed to resolve ambiguities in the digit stream when an index in a record of the digit prefix table references more than one record of the second table. Multiple records of the digit prefix table may have a common index to an identical record of the second table thus reducing the required number of records in the second table for characterizing call termination types. A call screening table is interrogated with termination type data obtained from the second table. The call screening table can pass call control to a national or international translator table which provide a route index on which further call processing is performed. The route index may be modified by an originator routing table, a carrier identification code routing table and a time of day routing table before the call is ultimately routed.

Dependencies are inferred from the claim text.