Device for the setting up and routing of telephone calls between subscribers of a radio network and/or of a wired telephone network
US5054042A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1989 |
| Grant date | Oct 1, 1991 |
| Priority date | — |
| Expiry date | Nov 15, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W84/02
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A device for setting up and routing telephone calls between subscribers of a radio-telephone network and/or a wired telephone network utilizes an automatic telephone exchange which is wired to the wired telephone exchange and connected to the radio-telephone network by a plurality of radio transceivers via a radio connecting unit. The radio connecting unit comprises a plurality of programmed processing units, each coupled respectively to a transceiver interface circuits, and a signal modem, controlled by the interface circuits. Each of the interface circuits have voice activity detectors for transmitting calls in an alternating mode between the subscribers of the radio-telephone network or between the subscribers of both networks. The programmed processing units are programmed with hierarchic restrictions to enable an organization of the radio-telephone subscribers into groups communicating on a same frequency and/or on a same transmission channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.