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. 15, 1981
Filed:
Oct. 11, 1979
Applicant:
Inventor:
David L Baldwin, Roanoke, VA (US);
Assignee:
International Telephone and Telegraph Corporation, New York, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
H04B / ;
U.S. Cl.
CPC ...
455601 ; 17917535 ; 1791 / ; 455-8 ; 455612 ;
Abstract
There is disclosed an optical transmission system which employs a plurality of receiver-transmitter pairs. One of the plurality of pairs is selected to propagate optical signals under control of switching means. The optical signal as propagated is monitored and if a fault is detected in the signal, another redundant receiver-transmitter pair is automatically switched in. This pair is also monitored to determine whether or not the optical signal is valid and if not, the sequence continues until a valid signal is being propagated.