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:
Feb. 10, 1987
Filed:
Jun. 25, 1984
Applicant:
Inventors:
Gregory P Dumas, Milpitas, CA (US);
Philip H Sutterlin, Sunnyvale, CA (US);
Assignee:
Rolm Corporation, Santa Clara, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04Q / ;
U.S. Cl.
CPC ...
370 58 ; 3701101 ;
Abstract
A pair of integrated circuits are described which provide a digital link between a branch exchange and a voice and data channel using an ordinary twisted pair. The downlink circuit permits coupling to a serial asynchronous port of different protocol than that used over the link and for instance, this port may be coupled to a keyboard, display or data terminal.