Cellular network data transmission system
US5146486A · kind A · utility
57Cited by
12References
30Claims
0Family size
Inventor
Key dates
| Filing date | Aug 31, 1989 |
| Grant date | Sep 8, 1992 |
| Priority date | — |
| Expiry date | Aug 31, 2009 |
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 landline as a backup telecommunications link. The system continuously monitors the links and switches to the back up link if the cellular link is not operative. A software package is included in the computer at a monitoring station for effecting integrity checks of the links, and RF fault modules are also included.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.