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:
Jun. 24, 2003
Filed:
Sep. 16, 1999
Jan Koeppen, Hildesheim, DE;
Guenter Neumann, Bad Salzdetfurth, DE;
Hans Lausen, Hildesheim, DE;
Lutz Bersiner, Hildesheim, DE;
Robert Bosch GmbH, Stuttgart, DE;
Abstract
For checking the transmission in an optical transmission installation with optical fibers for conducting optical useful signals between signal sources and signal acceptors (S/D), at which optical useful signals are coupled into or outcoupled from the optical fibers, which signals can be diverted to substitute paths at nodes (OCC) of the transmission device, checking signals (LS) are transmitted in both directions between the signal sources and signal acceptors (S/D) and nodes (OCC) as applicable in the respective optical fiber for at least one useful signal. The presence of the checking signals (LS) is checked, and in the absence of a checking signal (LS) from one line direction, the transmission of a checking signal (LS) in the opposite direction is suppressed. In this way it is assured that on both sides of a line problem, this problem will be detected and an alarm will be tripped if necessary, or a switchover will be made to a substitute path.