Method and apparatus for establishing telephone calling costs
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United States of America Patent
Stats
-
Aug 27, 1985
Grant Date -
N/A
app pub date -
Dec 8, 1983
filing date -
Dec 8, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Small communication systems do not have a sufficiently large memory to store the vast amount of data required to determine the cost of interstate telephone calls using the conventional method. The disclosed telephone call cost establishing method and apparatus compresses the amount of data required by supplying a set of coordinates for a central point in each area code. The cost of an interstate call to any central office in an area code is then determined using the coordinates of the central point for that area code. Additionally, certain types of calls are priced using a predetermined price code stored in a variety of tables such as toll call allowed, frequently called numbers, personal line and facility tables.
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