Dual mode modem for automatically selecting between wireless and wire-based communication modes
US6131136A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 12, 1997 |
| Grant date | Oct 10, 2000 |
| Priority date | — |
| Expiry date | Dec 12, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M11/06
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A dual modem automatically switches between a wireless and wire-based communication modes using mode selection circuitry that detects when a wire-based communications network, such as a standard land-line telephone network, is coupled to the modem. When the modem selection circuitry detects the presence of the wire-based communications network, it couples modem processing circuitry to a wire-based interface. When the modem selection circuitry fails to detect the presence of the wire-based communications network, it couples the modem processing circuitry to a wireless interface and the wireless interface is also powered for coupling to a wireless communications network, such as a cellular phone network. The wireless interface is not powered when the modem is coupled to the wire-based communications network.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.