Optical transmission system and transmission line switching control method
US5978354A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1996 |
| Grant date | Nov 2, 1999 |
| Priority date | — |
| Expiry date | Mar 18, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J2203/006
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Disclosed is an optical transmission system for transmitting data via an optical transmission line in accordance with a frame format having overhead which includes a K1 byte used for a switching request and a K2 byte used to respond to the K1 byte. The optical transmission system includes N sets of working terminal stations, one set of protection terminal stations, N-number of optical transmission lines for interconnecting respective ones of the N sets of working terminal stations one optical protection transmission line for interconnecting the one set of protection terminal stations, repeater stations, which are provided in the optical transmission lines between the N sets of working terminal stations, for demultiplexing and outputting data extracted from the transmission lines or for multiplexing data and inserting the data in the transmission lines, protection transmission line connecting units, which are provided at positions in a protection transmission line corresponding to positions at which the repeater stations are disposed, for switching a failed transmission line to the protection transmission line in every section demarcated by the repeater stations. A working terminal …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.