Supply for a subscriber control system

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

H - Electricity

04

M

379/63

H04M 19/00 (2006.01) H04M 19/08 (2006.01)

Patent

CA 1196742

ABSTRACT OF THE DISCLOSURE 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 digi- talization of the subscriber's telephone.

418485

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