Electronic switching system
US4150258A · kind A · utility
6Cited by
9References
8Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Feb 16, 1978 |
| Grant date | Apr 17, 1979 |
| Priority date | — |
| Expiry date | Feb 16, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q11/04
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a telephone exchange system comprising a time division exchange system and space division concentrators connected to said exchange system with a PCM lines, said concentrators are controlled by said exchange system, thus those volume of hardware in the concentrators can be considerably reduced. Said concentrator comprises a space division switching network having self-latched electronic contacts, which are controlled by a periodical drive pulse from a cyclic readout type memory.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.