Switching controller with supervisory mode for communication terminals
US5812646A · kind A · utility
5Cited by
4References
14Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 10, 1996 |
| Grant date | Sep 22, 1998 |
| Priority date | — |
| Expiry date | Apr 10, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/3275
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A switching controller controls two switches, which connect a first communication terminal such as a telephone set and a second communication terminal such as a facsimile machine to the same communication line. Under certain conditions, such as when the second communication terminal originates or answers a call for the first communication terminal, the switching controller monitors the status of the first communication terminal and automatically disconnects the second communication terminal from the communication line responsive to that status. For a telephone set, the monitored status is the on-hook/off-hook status.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.