Optical communications system
US5416623A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 30, 1993 |
| Grant date | May 16, 1995 |
| Priority date | — |
| Expiry date | Aug 30, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B2210/074
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A line monitoring arrangement of an optical fibre communications system carrying system data signals includes a test sequence generator, an optical transmitter and a correlator. The generator generates a sequence of test pulses, and the optical transmitter repeatedly launches the sequence of test pulses into a first end of a transmission line forming part of the communications system. The correlator correlates signals received at the first end of the transmission line with the sequence of test pulses to identify returned test pulse sequences. The test pulse sequences and system data signals are superimposed onto the transmission line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.