Supply for a subscriber control system

Details Supply for a subscriber control system Supply for a subscriber control system

1982-12-21

1987-03-24

Rubinson, Gene Z.

Telephonic communications

Centralized switching system

Power supply

379352, 379373, 379382, H04M 322, H04M 1902, H04M 1906

Patent

active

046530916

ABSTRACT:
The present invention relates to the D.C. supply for a subscriber control system, and consists essentially in supplying the control system from the exchange solely in response to a request, such request being emitted either by the exchange or by the control system, a preamble message being emitted in-line by the control system in order to initialize a communication in the latter case. The invention is applicable to the digitalization of the subscriber's telephone.

REFERENCES:
patent: 3936614 (1976-02-01), Suntop
patent: 3940570 (1976-02-01), Goudikian
patent: 4002850 (1977-01-01), Richards et al.
patent: 4070554 (1978-01-01), Rule et al.
patent: 4191859 (1980-03-01), Sabon
patent: 4197425 (1980-04-01), Secrett et al.
patent: 4197432 (1980-04-01), Tiedt
patent: 4284853 (1981-08-01), Lechner
patent: 4310725 (1982-01-01), Mehaffey
patent: 4319093 (1982-03-01), Bars
patent: 4385336 (1983-05-01), Takeshita et al.
patent: 4388497 (1983-06-01), Scheffler
patent: 4398064 (1983-08-01), Formosa, Jr.
patent: 4425512 (1984-01-01), Tomooka et al.

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