Central call screening system
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United States of America Patent
Stats
-
Nov 10, 2009
Grant Date -
N/A
app pub date -
Dec 18, 2002
filing date -
Nov 5, 2002
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A screening service for individual telephone lines to block unwanted calls based on call character signals and caller identification signals function in conjunction with a public switched telephone network. Calls identified by call character signals, as which identify a facsimile machine, and caller identification signals, as which identify an undesired call source, are recognized selectively in accordance with each program for individual telephone lines to provide blocking service including a termination cue. Using a dial-up connection, a subscriber can modify blocking information by a control program.
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Family
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Cited Art Landscape
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