Versatile communication device with a facsimile function and a telephone function
US6944275B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 8, 2001 |
| Grant date | Sep 13, 2005 |
| Priority date | — |
| Expiry date | Oct 10, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/32758
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a versatile communication device having a telephone function and a facsimile function, an erroneous detection of an on-hold melody as a control signal, such as a calling tone (CNG) signal, is prevented when the on-hold melody is played during an on-hold period of the telephone, thereby preventing the device from mistakenly switching connection to the facsimile function during the on-hold period. Further, the on-hold melody containing a signal component of the CNG signal or other control signal is prevented from sending to the remote device, so the remote device provided with a facsimile function does not switch to a facsimile mode during the on-hold status of the voice communication.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.