Three-way call detection system
US5768355A · kind A · utility
163Cited by
17References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 16, 1996 |
| Grant date | Jun 16, 1998 |
| Priority date | — |
| Expiry date | May 16, 2016 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/002
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Disclosed is a three-way call detection system that uses digital signal processing to identify a third party connection. The disclosed invention operates by establishing a baseline ambient, or background, noise level, and detecting when the signal noise level drops below the ambient noise level. When the current signal noise level drops below the ambient noise level, the system assumes that a three-way conference call has been attempted by the called party.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.