CIRCUIT ARRANGEMENT FOR TELECOMMUNICATION SWITCHING SYSTEMS EMPLOYING TIME-DIVISION MULTIPLEX OPERATION

摘要

Each inlet of a TDM switching matrix and a plurality of associated control lines are connected to equivalent inputs of first NAND-circuits whose outputs are combined into the outlets of the switching matrix via second NAND-circuits. Decoders and matching circuits are not needed. If the control inlets are not wired, a simulation of a selection by special block circuits is prevented.