Optical transmission device and method for checking transmission in an optical transmission device

US6583898B1 · kind B1 · utility

Assignee

• Robert Bosch GmbH · DE

Inventors

• Jan Koeppen · Hildesheim, DE
• Guenter Neumann · Bad Salzdetfurth, DE
• Hans Henrik Lausen · Randers, DK
• Lutz Bersiner · Hildesheim, DE

Key dates

• Filing date: Sep 16, 1999
• Grant date: Jun 24, 2003
• Expiry date: Sep 16, 2019

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04J14/0279
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

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.