AC type line concentrator
US4112260A · kind A · utility
5Cited by
2References
6Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 1, 1977 |
| Grant date | Sep 5, 1978 |
| Priority date | — |
| Expiry date | Feb 1, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q3/521
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An ac type line concentrator for use in a data communication system, comprising a crosspoint switch circuit. The crosspoint switch circuit is constituted by a plurality of crosspoint switches capable of switching an analog signal (hereinafter referred to as an analog switch), so that a carrier signal modulated by a data signal may be transferred from one of m incoming lines connected with m terminal units to a selected one of n(n<m) outgoing lines connected with a central unit through the ac type line concentrator without being demodulated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.