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:
Sep. 19, 1989
Filed:
Aug. 03, 1988
Richard W Faith, Oxnard, CA (US);
Harris Corporation, Melbourne, FL (US);
Abstract
The functionality of the keypad of a telephone test set is augmented by an interface circuit arrangement which enables keys of the keypad to be used to control both dialing signal generation and prescribed test functions, while effectively preventing interference between the operation of a dialing signal generator, to which the keypad is coupled during a first mode of operation, and that of test function signal generator circuitry, provided exclusive of the dialing signal generator, during a second mode of operation. Additionally, the test set includes a ringing signal coupling circuit for enabling the test set microphone, through which a telephone craftsperson voices audio speech signals to a speech signal processing circuit, to be used to audiblize the ringing signal, without impacting the normal voice input functionality of the microphone and associated speech signal processor.