Apparatus and method for CNG detection with call waiting
US7184537B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 3, 2004 |
| Grant date | Feb 27, 2007 |
| Priority date | — |
| Expiry date | Aug 14, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2203/2066
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A telephone switching device which includes a detector for identifying a call waiting (CW) signal when the incoming telephone line is in use. The detector device automatically switches the incoming telephone line to the second call and monitors for additional coded function signals such as a facsimile machine calling (CNG) signal indicating that a data transmission is desired. Appropriate switching functions are provided to connect attached telephony data devices for receiving the incoming data transmission. A microprocessor is used for receiving various function signals and performing the switching of the telephone line and attached apparatus. This allows the reception of an incoming data transmission on a single telephone line while the line is already in use. A voice message can be provided before the switching of the telephone line in response to the CW signal warning the first caller of the impending switch. Provisions are included for verifying incoming function signals and time delay sequences are incorporated for the attached data apparatus to be initiated and receive the incoming data transmission.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.