Dc termination circuit for subscriber cables

Details Dc termination circuit for subscriber cables Dc termination circuit for subscriber cables

H - Electricity

04

B

379/3

H04B 3/00 (2006.01) H04B 3/02 (2006.01) H04B 3/46 (2006.01)

Patent

CA 1299789

Abstract of the Disclosure A DC termination circuit is disclosed for use in a communication system. The circuit is positioned between a subscriber terminal and a pair of subscriber cables in the communication system for digitally transmitting data from the subscriber terminal via the pair of subscriber cables. The termination circuit comprises a termination resistor connected to one of the paired subscriber cables and a parallel-connected circuit. The parallel-connected circuit includes voltage-sensitive means which is connected in series to the termination resistor and is off when the voltage does not exceed a prescribed level and is turned on when the voltage exceeds the prescribed level, and switching means connected in parallel to the voltage- sensitive means. A switch driving means having one end connected to the parallel-connected circuit and the other end connected to the other of the paired subscriber cables is provided for controlling the switching means.

588619

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