Concentrator-deconcentrator devices
US4420832A · kind A · utility
2Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 21, 1980 |
| Grant date | Dec 13, 1983 |
| Priority date | — |
| Expiry date | Apr 21, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q11/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Concentrator-deconcentrator devices for time-division telephone systems, based on the use of symmetrical time-division arrays arranged in terminal modules comprising subscriber and line connecting units to be served and in central modules which provide the connections between these equipments and the exchange to which the device is connected by ensuring variable concentration and improved security. The device is intended for PCM time-division telephone systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.