Loop-back control apparatus for a loop network having duplicate optical fiber transmission lines
US4829512A · kind A · utility
24Cited by
2References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 26, 1987 |
| Grant date | May 9, 1989 |
| Priority date | — |
| Expiry date | Aug 26, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/085
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A loop-back control apparatus for use in an optical fiber transmission system, wherein it is possible to compensate for faults in opto-electrical and electro-optical converters contained in the optical fiber transmission system. An electrical switch, an optical switch, and duplicate access controllers are provided, the electrical and optical switches being controlled by a control signal generator to enable selection from among the various electro-optical and opto-electrical converters in the event of fault in one of those devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.