Methods and systems for determining the classification of a call

Details Methods and systems for determining the classification of a call Methods and systems for determining the classification of a call

1997-03-07

1999-06-29

Hong, Harry S.

Telephonic communications

Centralized switching system

379113, 379114, 379115, 379133, 379201, H04M 300, H04M 1500

Patent

active

059179023

ABSTRACT:
Methods and systems to determine whether a directory number is classified as associated with other directory numbers or associated by local calling area. In a first method, a table of patterns is provided. Each pattern includes a terminating NPA-NXX designation that represents a directory number associated with a terminating device that may be dialed as a local call from an originating device having a local calling area pattern corresponding to the pattern to which this terminating NPA-NXX designation belongs. In response to receipt of an NPA-NXX portion, the pattern table is checked for a corresponding pattern and information is provided about the corresponding pattern. This information includes a terminating NPA-NXX designation. A determination may be made from the information as to what directory number may be dialed as a local call from the originating device having the NPA-NXX portion. In a second method, local calling area (LCA) pattern file including a plurality of LCA patterns is provided. Each LCA pattern includes a switch entry having a first part with a switch identifier and a second part with a directory number that is served by the switch and that is part of LCA pattern to which the switch entry belongs. In response to receipt of a directory number, the LCA pattern file is checked for a corresponding LCA pattern. Information is provided with respect to the corresponding LCA pattern.

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