Apparatus and method for detecting the source of a telephone tone signal
US6292545A · kind A · utility
3Cited by
11References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 28, 1998 |
| Grant date | Sep 18, 2001 |
| Priority date | — |
| Expiry date | May 28, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/654
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A telephone answering apparatus for detecting the source of a telephone tone signal includes a signal detector for detecting the telephone tone signal, a memory storage device for storing a message, and a controller for stopping playback of the message in response to the telephone tone signal wherein the controller determines whether the telephone tone signal is present while playback of the message is stopped. A timer is operatively connected to the signal detector to designate a period of time for the signal detector to detect for the presence of the telephone tone signal while playback of the message is stopped.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.