Protection device for telephone line and interface

Details Protection device for telephone line and interface Protection device for telephone line and interface

1998-01-15

2000-05-09

Chiang, Jack

Telephonic communications

Terminal accessory or auxiliary equipment

Protective structure

379437, H04M 100

Patent

active

060614471

ABSTRACT:
A passive, non-armored shield for protecting e.g., an exterior telephone service line and/or telephone service box. The shield comprises a layered structure which includes a TP non-conductive, preferably styrene panel which is sized and dimensioned to encase a space which includes the telephone service line and telephone service box. A pair of conductive laminates, each having a conductive foil layer (e.g., aluminum) and a non-conductive layer, e.g., polyester film and a heat seal coating are disposed on the panel. Each of the conductive layers is electrically connected to an electrical contact pad which in turn is connected via a terminal block to a building alarm and/or security system. Tamper switches are also provided to detect any unauthorized attempt to remove the shield. Any attempt by an intruder to cut the telephone service lines or disconnect the telephone service box will trigger an alarm via the tamper switch and/or a short circuit created between the conductive layers by, for example, use of a drill, saw, knife, or the like, to penetrate the shield.

REFERENCES:
patent: 2879725 (1959-03-01), Zuver
patent: 3633194 (1972-01-01), Kothe
patent: 4246451 (1981-01-01), Nix
patent: 4673771 (1987-06-01), Grant
patent: 4731819 (1988-03-01), Kalfon
patent: 5018185 (1991-05-01), Riddle
patent: 5315654 (1994-05-01), Kraft
patent: 5369548 (1994-11-01), Combs
patent: 5930355 (1999-07-01), Poston

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