Patent ID: 7508820
Filing Date: 2009-03-24
Classification: H04L

Abstract:
1. A VoIP (Voice over Internet Protocol) communication apparatus which is connected with more than one telephone device, receives a call number from the telephone device, and judges whether the call number coincides with any of a plurality of telephone numbers managed by a call server, comprising: a symbol storing section in which respective symbol correspondence data corresponding to respective symbols used for expressing said telephone number are stored as bit strings, and a distinguishable predetermined bit value is written in predetermined bit positions that are different positions in each said bit string from other said bit strings with respect to said respective symbol correspondence data; a number scope storing section in which respective figure correspondence data corresponding to respective figures each being able to use more than one said symbol are stored to correspond to a number scope containing said plurality of telephone numbers, and said predetermined bit value is written in at least one said predetermined bit position corresponding to the more than one symbol with respect to each figure correspondence data; and a collating and judging section which respectively collates said symbol correspondence data that are stored in said symbol storing section and correspond to said symbols on respective figures in said call number with said figure correspondence data of the same figure stored in said number scope storing section, and judges whether said call number is contained in said plurality of telephone numbers.