Device for responding to state request on an open phone line
US6828906B2 · kind B2 · utility
9Cited by
10References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2003 |
| Grant date | Dec 7, 2004 |
| Priority date | — |
| Expiry date | Jul 11, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/2854
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Provided is an apparatus and method for detecting a state of a device such as a meter or appliance and transmitting to a remote location a particular tone or tones corresponding to the detected state. The transmission is initiated either by a predetermined series of tones from the remote location to the apparatus or by changing conditions within the device. The claimed subject matter enables a service provider to detect a service outage, the scope of the outage and the resumption of service.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.