Communication system using unbalanced communication paths

Details Communication system using unbalanced communication paths Communication system using unbalanced communication paths

H - Electricity

04

M

379/66

H04M 3/18 (2006.01) H04B 3/00 (2006.01) H04B 3/30 (2006.01) H04M 1/723 (2006.01) H04Q 3/58 (2006.01)

Patent

CA 1284845

ABSTRACT OF THE DISCLOSURE A signal communication apparatus is used for a telephone sys- tem having a plurality of unbalanced communication paths. A feed- back line of each unbalanced communication path is connected to a ground level and each unbalanced communication path including a phase reversing transformer. The phase reversing transformer pro- duces two induced currents in the connected path if a speech signal is transmitted through another path. The induced currents are can- celled due to mutual interference.

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