Operation and maintenance of clock distribution networks having redundancy
US6195758A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1998 |
| Grant date | Feb 27, 2001 |
| Priority date | — |
| Expiry date | Mar 27, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J3/0688
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a network, such as a large telecommunication switch, intended for the processing of information in different stations and for transmitting information between the stations, circuits are provided which generate independently composite clock signals containing both a clocking rate and a frame synchronizing rate. These clock signals are transmitted on three different transmission lines in parallel and independently to a station, where some kind of information processing is made in redundant planes. In the station all incoming clock signals are fed to each one of three independently operating selector units in which a choice of a clock signal is made for obtaining a clock signal to be used in the three redundant planes arranged in parallel to each other and operating independently of each other, in the station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.