H - Electricity – 04 – M
Patent
H - Electricity
04
M
379/57
H04M 3/26 (2006.01) H04M 19/00 (2006.01)
Patent
CA 1109170
ABSTRACT: An arrangement for line supervision of a subscriber's line circuit by means of a measuring resistor, the subscriber's line being supplied via an AC/DC converter coupled to a square-wave signal generator. The measuring resistor is inductively coupled to the subscriber's line and to a conductor in which the square-wave signals supplied by the square- wave signal generator are present. A measuring device is provided which is connected to the measuring resis- tor for measuring the signal across the resistor.
306008
Brockmann Klaus-Dieter K.
Dijkmans Eise C.
N.v. Philips Gloeilampenfabrieken
Van Steinburg C.e.
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