FIELD: automatic communication. SUBSTANCE: for reduction of number of internal interlocks and dimensions of equipment commutational device is inserted with additional commutation unit 3 and with its couplings to commutation units 1(1)-1n and 2(1)-2n of first and second links. Connections 1n and 2n prevent blocking of subscribers integrated in it, that is makes them priority subscribers. EFFECT: enhanced operational efficiency. 1 dwg
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