Switch network
US4435706A · kind A · utility
23Cited by
6References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 2, 1981 |
| Grant date | Mar 6, 1984 |
| Priority date | — |
| Expiry date | Nov 2, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q9/16
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A plurality of remote stations are sequentially addressed by a master controller to ascertain the status of associated sensing devices. The addresses are each comprised of a sequence of sinusoidal waveforms which are counted by the remote stations and compared with a preselected station number. Each addressed station responds by driving a communication line to a low voltage level for a time interval determined by the status of its associated sensing device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.