Audio distribution system

Details Audio distribution system Audio distribution system

1992-01-09

1994-11-08

Chin, Stephen

Telephonic communications

Private or single line system

With paging

379171, 381 81, 381 85, H04R 2700

Patent

active

053634349

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.

REFERENCES:
patent: 3978468 (1976-08-01), Bond et al.
patent: 4113986 (1978-09-01), Clement et al.
patent: 4554411 (1985-11-01), Armstrong
patent: 4987589 (1991-01-01), Trell
patent: 5131048 (1992-07-01), Farenelli et al.

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