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. 27, 1998
Filed:
Dec. 27, 1995
William G Ortel, New York, NY (US);
Nynex Science & Technology, White Plains, NY (US);
Abstract
A fault detection system for a broadband network having a central switch for switched telecommunications connections among subscribers each provided with subscriber interface equipment. The subscriber interface equipment has a received voice path and generates baseband signals for voice telephony which are carried at a carrier frequency on the broadband network. The fault detection system is provided with a tone generator for providing a constant, continuous pilot throughout the network. A pilot tone detector at the subscriber interface equipment detects the absence of pilot tone. The central switch is responsive to each pilot tone detection to recognize the absence of pilot tone at the corresponding subscriber location.