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:
Mar. 27, 1990
Filed:
Aug. 28, 1989
Dennis C Blood, North St. Paul, MN (US);
David L Ingalsbe, Hastings, MN (US);
Independent Technologies, Inc., Omaha, NE (US);
Abstract
A compact, unitary test device for use with telephone line conductors connected to customer premises telephone equipment comprises a first test circuit for terminating the conductors of the telephone line and for measuring current therein. The device also comprises a second test circuit for measuring current in the line conductors in series with the customer premises equipment during operation. A third test circuit provides a tone signal of a predetermined frequency to the line conductors. The test device has a switch set, a current measurement section, a resistance section, a tone generator and a power source. Further provided is a method of testing a telephone loop by measuring loop current level from a terminated position and in series with operative customer premises equipment. A tone signal is generated at a first predetermined point on the line conductors for reception at a second predetermined point.