Alternative routing system for mobile telephone calls
US6643523B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 18, 1998 |
| Grant date | Nov 4, 2003 |
| Priority date | — |
| Expiry date | Aug 7, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/725
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A cellular telephone is provided with a connector for connecting it to an interface unit. The interface unit can exchange speech and data signals with the telephone as well as providing power. When the telephone is connected to the interface unit, its antenna is effectively disabled. The interface unit provides a link between the telephone and a BTS via a communication path other than the cellular telephone system's conventional cell arrangement. The communication path can include telephone or ISDN connections, leased lines, point-to-point microwave links or coaxial cable. In the cases of telephone and ISDN lines and leased lines, baseband speech and data signals pass between the telephone and the interface unit and a modem is used to transmit and receive these signals over the communication path. If a microwave link or coaxial cable is used, RF speech and data signals may be passed between the telephone and the interface unit. A single interface unit may be used to provide connections for a plurality of telephones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.