Optical TDM transmission system
US5917627A · kind A · utility
4Cited by
9References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 14, 1996 |
| Grant date | Jun 29, 1999 |
| Priority date | — |
| Expiry date | Jun 14, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J7/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In an optical TDM transmission system in which a set of N tributary channels at one bit rate are multiplexed on to a single multiplexed channel at N times the bit rate of the tributary channels, an amplitude modulation with a fundamental frequency matched to a subharmonic of the tributary bit rate is impressed on the multiplexed signal. At the demultiplexer this modulation is detected to provide a clock for separating the tributary channels in a manner which directs specific tributary channels to specific outputs without having to have recourse to reading any of the transmitted data itself.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.