Method and apparatus for detecting a secondary destination of a telephone call based on changes in the telephone signal path
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United States of America Patent
Stats
-
Oct 31, 2000
Grant Date -
N/A
app pub date -
May 30, 1997
filing date -
Mar 27, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A method and apparatus for detecting whether a remote party has added a secondary telephone destination to a telephone call, for example through the activation of three-way calling service, conference calling or two lining bridging, by identifying an echo characteristic to the telephone connection between the local and the remote telephone and monitoring the echo characteristic to determine whether there is a significant change. The addition of a secondary telephone destination can be verified by continuing to monitor the echo characteristic to determine whether it has returned to its original value.
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