System and method for updating database of customers' telephone numbers
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 6, 1999
Grant Date -
N/A
app pub date -
Jan 31, 1997
filing date -
Feb 2, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A telephone number status is rapidly and easily examined to update a telephone number list. Telephone numbers stored in a telephone number list are sequentially transmitted from an ISDN line to a telephone line in a digital communication mode for making calls, and the status of each called telephone line is determined from connection information or from a line disconnect reason received from an associated station.
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Cited Art Landscape
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