Telephonic communications – Call or terminal access alarm or control – Fraud or improper use mitigating or indication
Reexamination Certificate
2006-11-14
2006-11-14
Appiah, Charles N. (Department: 2617)
Telephonic communications
Call or terminal access alarm or control
Fraud or improper use mitigating or indication
C379S188000, C379S406010, C370S290000, C455S570000
Reexamination Certificate
active
07136471
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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Appiah Charles N.
Fulbright & Jaworski LLP
T-NETIX, Inc.
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