FIELD: communications engineering; data transfer over cable lines. SUBSTANCE: device has circuit for matching transceiving part with power cable, this circuit incorporating matched transformer and coupling capacitor. One of matching-transformer windings is made of ground conductor of armored cable braid and stray capacitances between armored braid and current-carrying conductors of power cable function as coupling capacitor. EFFECT: reduced space requirement for matching circuit. 1 cl, 2 dwg
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