Optical transmission system
US5457555A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 2, 1993 |
| Grant date | Oct 10, 1995 |
| Priority date | — |
| Expiry date | Sep 2, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/032
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An optical transmission system allows quick switching to protection side transmitting and receiving circuits by providing sub optical or subsidiary transmitting and receiving circuits for each current side transmission unit and each protection side transmission unit. A controller or exerciser successively starts the sub optical transmitting circuits of the current side transmission units for a predetermined time when no fault is detected. When a fault is detected, the defective portion of the system is bypassed using the protection side transmission units and the sub optical transmitting and receiving circuits of the affected current side transmission units. In this manner, the time required for the received signal to stabilize is reduced to about 10 msec.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.