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:
Dec. 03, 1996
Filed:
May. 26, 1995
Applicant:
Inventor:
Syuji Suzuki, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04J / ; H04B / ;
U.S. Cl.
CPC ...
359117 ; 359128 ; 359139 ; 359179 ;
Abstract
The present invention provides a method for transmitting terminal connection control signals and supervisory signals between a photonic switching system and its subscriber terminals without using any light source in the photonic switching system. After modulating amplitude of the photonic communications signals by the terminal connection control signals in the form of electric signals the photonic communications signals are inputted to the subscriber terminals to be demodulated for regenerating the terminal connection control signals.