Wireless phone-interface device
US7248157B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 1, 2001 |
| Grant date | Jul 24, 2007 |
| Priority date | — |
| Expiry date | May 1, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B25/008
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
In one aspect, a phone-interface device determines whether a problem has occurred at a control panel by determining whether a signal from the control panel has been received, and when a signal has not been received within a period of time, the phone-interface device transmits an error message to a monitoring station. In another aspect, the control panel determines whether a problem has occurred at the phone-interface device by determining whether a signal from the phone-interface device has been received, and when a signal has not been received within a period of time, the control panel transmits an error message to a user. In another aspect, the phone-interface device contains memory to buffer data transferred between the control panel and a monitoring station. In this way, a high-speed connection between the phone-interface and the monitoring station can be accommodated while using a lower-speed connection between the phone-interface device and the control panel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.