Subscriber connection circuit

Details Subscriber connection circuit Subscriber connection circuit

1982-08-03

1985-01-08

Brown, Thomas W.

179 18HB, H04M 306, H04M 322

Patent

active

044928211

ABSTRACT:
In the monitoring of various loop states of subscriber connection lines, a decentralized individual subscriber analysis device is employed which is connected to the subscriber connection line via a voltage divider whose divider ratio is modified accordingly, for which purpose feed resistors of different values are used. For establishing loop closure as a result of a call, during the ringing phase the feed-in points for feed current and ringing alternating current are selected to be such that the ringing alternating voltage components at the inputs of the analysis device compensate one another and therefore do not influence the result of analysis.

REFERENCES:
patent: 4099032 (1978-07-01), Roge et al.
patent: 4297531 (1981-10-01), Dalhof et al.

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