Cellular network data transmission system
US5327478A · kind A · utility
57Cited by
8References
24Claims
0Family size
Inventor
Key dates
| Filing date | Jun 12, 1992 |
| Grant date | Jul 5, 1994 |
| Priority date | — |
| Expiry date | Jun 12, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q2213/13174
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A data transmission network uses a cellular network as a primary telecommunications link and a backup telecommunications link. The system continuously monitors the links and switches to the back up link if the cellular link is not operative. Examples of backup links include long-range radio and fiber optics. A software package is included in a computer at a monitoring station for effecting integrity checks of the links, and RF fault modules are also included. The RF fault module can be used in conjunction with a control panel having one line output or with a control panel having two separate line outputs.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.