Line switching system for duplexed fiber interface shelf between different modes
US5712847A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 14, 1995 |
| Grant date | Jan 27, 1998 |
| Priority date | — |
| Expiry date | Dec 14, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L1/22
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Switches connected via transmission lines, wherein one switch has a bidirectional mode, while the other switch has a unidirectional mode. To realize line switching when a failure occurs, the switches function to switch signals from a working transmission line to a protection transmission line. The switch having the bidirectional mode switches concurrently both first and second direction paths from a working transmission line to a protection transmission line. The switch having the unidirectional mode switches either one of the first and second direction paths from the working transmission line to the protection path. When the second switch switches to send signals via the first direction path of the protection transmission, the first switch notifies the second switch as if a fault occurred in the second direction path of the working transmission line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.