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:
Mar. 04, 1980
Filed:
Sep. 28, 1978
Applicant:
Inventors:
Donald W McLaughlin, Naperville, IL (US);
Julius Jusinskas, Jr, Glen Ellyn, IL (US);
Assignee:
GTE Automatic Electric Laboratories Incorporated, Northlake, IL (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04J / ;
U.S. Cl.
CPC ...
179 / ; 179 / ;
Abstract
Digital Carrier Trunks connected via a supervisory decoding and multiplexing logic to an electronic digital PABX. The circuit is arranged to receive or transmit the supervisory signal in either the 'Ground Start', E&M modes or a combination of both in either the D2 or D3 signalling format over a T1 carrier span without converting to the analog signal form.