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. 09, 1986
Filed:
Jul. 08, 1983
Vincent G LeBlanc, Saint John, CA;
Allan B Cameron, Saint John, CA;
The New Brunswick Telephone Company Limited, St. John, CA;
Abstract
A telephone conference bridge system comprising line interface circuits, bridge circuits, a tone transmitter/receiver and a microcomputer. The system is controlled by the microcomputer and can provide changeable levels of security such as (1) all ports open to receive incoming calls, (2) access only upon dialing a two-digit code and (3) all unused ports closed after a conference is established. Tone codes can also be used to activate a port occupancy detection system or to disconnect all callers from the bridge. One port is a 'Chairman's Port' which is the only one able to make outgoing calls from the bridge or change the programming of security levels and codes, excepting that any TouchTone set on any port can implement security level (3) above with or without the chairman's port occupied.