Calling type identification system
作者： Keith Eric Fenton , Scott William Groth , Kenneth A. Spiller , Karen S. Riepenkroger , Lavinia Rotaru
DOI:
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摘要: A calling type identification system selects a type. The NPA-NXX telephone number blocks for the based on block categories related to develops data selected blocks. receives call. processes and identify indicate if call is of
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