Fault locating system in optical fiber transmission system
US4257033A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 2, 1979 |
| Grant date | Mar 17, 1981 |
| Priority date | — |
| Expiry date | Aug 2, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/29
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A fault location system in an optical fiber transmission system, in which a plurality of optical signal regenerative repeaters are sequentially connected in cascade in an optical fiber transmission cable at predetermined intervals to transmit digital information in the form of optical signals. Each of the plurality of optical signal regenerative repeaters sends out a fault location information signal composed of an inherent pattern and a fixed pattern when a fault occurs in the corresponding repeater. The inherent pattern is uniquely assigned to the optical signal regenerative repeater from a plurality of individually distinguishable inherent patterns obtained by establishing the start bits of a pseudo-noise sequence at time positions successively delayed from one after another. The fixed pattern is necessary for indicating the time positions of the start bits. A malfunction position in the optical fiber transmission system can be detected by detecting the fault location information signal at a monitor station in the optical fiber transmission system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.