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. 22, 1987
Filed:
Oct. 03, 1985
Applicant:
Inventor:
Thomas Oswald, Dartford, GB;
Assignee:
STC plc, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04B / ; H04L / ;
U.S. Cl.
CPC ...
455601 ; 370 16 ; 455-8 ;
Abstract
In an optical transmission system, particularly a submerged system, a line finding system is provided which, in the event of a fault somewhere along the system, enables the remaining operative lines or paths to take over the traffic and thus 'steer around' the fault. The laser sources of the submerged repeaters and switched by electrical selection at their input using failed clock or a supervisory signal to achieve the switching.