Optical transmission systems
US4696060A · kind A · utility
11Cited by
5References
6Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 3, 1985 |
| Grant date | Sep 22, 1987 |
| Priority date | — |
| Expiry date | Oct 3, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/74
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In an optical transmission system, particularly a submerged system, a line finding system is provided which, in the event of a fault somewhere along the system, enables the remaining operative lines or paths to take over the traffic and thus "steer around" the fault. The laser sources of the submerged repeaters and switched by electrical selection at their input using failed clock or a supervisory signal to achieve the switching.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.