Audio teleconferencing
US4456789A · kind A · utility
26Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 5, 1979 |
| Grant date | Jun 26, 1984 |
| Priority date | — |
| Expiry date | Mar 5, 1999 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M3/569
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A control unit for controlling operation of a plurality of audio teleconference terminals comprises a plurality of inputs which are connected each to a particular terminal. A speech detector detects from which terminals speech signals are received and actuates switching means to connect those terminals in open loop teleconference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.