Radio telephone system control method
US5140628A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 1989 |
| Grant date | Aug 18, 1992 |
| Priority date | — |
| Expiry date | Nov 30, 2009 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/00
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
In a method and apparatus for controlling a radio telephone system, a speech channel is established between the slave radio set of a plurality of radio telephone sets and a radio set of a base unit. An intercom switch for selecting intercom performances is provided for respective radio telephone sets. The slave radio sets of the radio telephone sets are turned OFF when the intercom switch is OFF, and transmitters of the slave radio sets of the radio telephone sets are turned ON. Consequently the connection between a wired telephone channel and the plurality of radio telephone sets can be controlled with a single base unit connected to the wired telephone channel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.