Alarm monitoring telecommunications line condition detection and automatic calibration
US8723671B2 · kind B2 · utility
159Cited by
7References
24Claims
0Family size
Assignee
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Key dates
| Filing date | Jan 22, 2010 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | Sep 26, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B25/08
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A method at an alarm monitoring station and security system arrangement for detecting alarm signals originating at security systems on incoming calls carried by a telecommunications line includes, for each call, measuring a noise level on the line in the absence of signals originated by the security systems. Based on the measuring, at least one signal detection threshold above the noise level is set, wherein a level of a signal must exceed the signal detection threshold in order to be detected as a data signal. Alarm data signals in the call are detected using the signal detection threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.