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. 23, 1980
Filed:
Dec. 29, 1978
Frank P Tuhy, Jr, Montville, NJ (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
A subscriber loop carrier system is disclosed in which a plurality of telephone subscriber communications channels are frequency-multiplexed on a single wire pair using analog modulation techniques. Supervisory signaling for each channel is accomplished by modulating the channel carrier with a plurality of tones coded so as to represent a plurality of supervisory functions including multiparty superimposed ringing (four-party fully selective, eight-party semiselective), two-party ringing and tip party identification, and standard single party ringing, as well as off-hook and dial pulse superivision. The system is designed to be universally compatible with any of the above classes of service.