PERFECCIONAMIENTOS EN MATRICES ELEMENTALES DE CONMUTACION MIC PARA CENTRALES TELEFONICAS

摘要

The present PCM switching element is intended to be used in digital telephone exchanges for the making of switching or concentration stages of whatever capacity. …In fact, structures consisting of a plurality of such elements are easily performed thanks to use of a bit associated with each outgoing PCM channel, called "busy bit". …The switching element can be controlled by a commercially available microprocessor and can be made as an integrated circuit.