Audio distribution system
US5363434A · kind A · utility
11Cited by
5References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1992 |
| Grant date | Nov 8, 1994 |
| Priority date | — |
| Expiry date | Jan 9, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2227/005
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A signal distribution and communication arrangement controls the broadcast of different types of signals through speakers located in various zones. The system includes a telephone interfaced with a door speaker controller to allow communication between the telephone and a door speaker. A page may be broadcast over the speakers and subsequently muted to allow private communication when the page is answered. Also included is a doorbell interface circuit that responds to a doorbell source. The doorbell source may be activated by any one of a plurality of doorbell switches.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.