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:
Nov. 15, 1983
Filed:
Nov. 20, 1981
Donald D Huizinga, Indianapolis, IN (US);
Paul W Thompson, Indianapolis, IN (US);
Bell Telephone Laboratories, Incorporated, Murray Hill, NJ (US);
Abstract
A method and arrangement is disclosed for providing a digital conference capability for subscribers of a time division multiplex (TDM) communication system. Each conferee's pulse code modulation (PCM) signal is assigned one of N conference time slots of the TDM system. The arrangement serially stores in memory the PCM signals of N-1 time slots. Circuitry serially generates the sum of the previously stored N-1 time slot PCM signals concurrently with the serial writing into memory of the PCM signal of each time slot. During each time slot a composite PCM conference signal is formed by combining the PCM signal of that time slot with the summed PCM signal and distributed to the conferees assigned to that time slot.