The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 18, 1983
Filed:
May. 11, 1981
Omprakash G Ahuja, East Meadow, NY (US);
TII Industries, Inc., Copiague, NY (US);
Abstract
A line test termination device for use on a telephone subscriber line having a pair of electrically conductive paths to provide an audio-visual indication when interrogated by the telephone central office and a subscriber test to indicate the operability of the subscriber line includes in combination, a first current path having a neon tube and an audio indicator connected in series; a second current path with a first normally open switch, a first resistor, a first zener diode and an indicating meter connected in series, all of which are placed in parallel with the first current path. Additionally included is a current polarizing circuit arrangement connected across the pair of electrically conductive paths to provide a unidirectional flow of current through the first and second current paths regardless of the polarity of voltage applied across the pair of electrically conductive paths. A second switch and a second resistor are connected across the neon tube to provide the subscriber with means for obtaining a dial tone without the use of a telephone instrument. All of the above components may be disposed within a housing that may be permanently left across the subscriber line and received into a conventional telephone socket.