Telecommunications – Radiotelephone system – Security or fraud prevention
Reexamination Certificate
2006-04-04
2006-04-04
Gesesse, Tilahun (Department: 2684)
Telecommunications
Radiotelephone system
Security or fraud prevention
C455S410000, C380S252000
Reexamination Certificate
active
07024175
ABSTRACT:
A system to thwart eavesdropping on microphonic audio signals generated by a powered telecommunications device connected to a communications line, comprising a noise generator for applying low level noise to the line, thereby masking microphonic audio signals, and a disconnect circuit for disconnecting the telecommunications device from the line in the absence of power to the telecommunications device.
REFERENCES:
patent: 2932693 (1960-04-01), Wilcox, Jr.
patent: 3497623 (1970-02-01), Todd
patent: 3718765 (1973-02-01), Halaby
patent: 3944743 (1976-03-01), Criglar et al.
patent: 4091232 (1978-05-01), Lenk et al.
patent: 4675901 (1987-06-01), Smith et al.
patent: 4920567 (1990-04-01), Malek
patent: 4949375 (1990-08-01), Houle
patent: 4972469 (1990-11-01), Saltwick et al.
patent: 5008937 (1991-04-01), Yamamura et al.
patent: 5168519 (1992-12-01), Scarinci et al.
patent: 5181243 (1993-01-01), Saltwick et al.
patent: 5454037 (1995-09-01), Pacella
patent: 5657384 (1997-08-01), Staudacher et al.
patent: 5787180 (1998-07-01), Hall et al.
patent: 5805635 (1998-09-01), Andrews, Jr. et al.
patent: 5835585 (1998-11-01), Morse
patent: 5911119 (1999-06-01), Bartholomew et al.
patent: 5963621 (1999-10-01), Dimolitsas et al.
patent: 6163216 (2000-12-01), Murray et al.
patent: 6229897 (2001-05-01), Holthaus et al.
patent: 6311071 (2001-10-01), Voroba et al.
“Loop Extender Circuit for the MT8972 DNIC”, MITEL Application Sheet MSAS-46, ISSUE 1, Apr. 1986, pp. 12-7 through 12-9.
“On-Hook Telephone Audio Security Performance Specifications” TSG Standard 5, Telephone Security Group, Mar. 1990.
Moquin Philippe
Pillay Bipin
Gesesse Tilahun
Mitel Corporation
Staas & Halsey , LLP
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