Method and apparatus for improving premises-line call availabiliy in an alarm system
US6973165B2 · kind B2 · utility
10Cited by
6References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 18, 2002 |
| Grant date | Dec 6, 2005 |
| Priority date | — |
| Expiry date | Jan 7, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L12/2854
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
When an alarm panel needs to transmit alarm data, it seizes the PSTN and disconnects the premises-wiring. If in a call, the user is cut off immediately and it appears to the user that the connection to the PSTN has been lost. If trying to place a call, the user also perceives that the connection to the PSTN is lost. The present invention provides tonal signals to the user to indicate that the PSTN line is in use by the alarm panel and also notifies the user when the PSTN connection is available for use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.