Detecting dial tone on a telephone line
US10063691B1 · kind B1 · utility
0Cited by
40References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 25, 2016 |
| Grant date | Aug 28, 2018 |
| Priority date | — |
| Expiry date | Dec 22, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2201/18
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method to detect dial tone on a telephone line may include taking samples of incoming audio on a telephone line. The method may also include determining volumes of the samples. The method may further include determining whether the volumes of a threshold number of the samples are at or above a threshold volume. The method may also include, in response to determining that the volumes of a threshold number of the samples are at or above a threshold volume, determining that the incoming audio on the telephone line includes a dial tone.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.