Transition - switching device for by means of cutting ends transition and method for switching over from the ends by means of cutting devices - telephone via

摘要

An electrical transition switching apparatus and method for permitting transition switching of subscribers lines from earlier generation switching system units such as, panel, crossbar and step-by-step to similar generation systems or to new generation systems such as, the new electronic switching system units (E.S.S.), comprising cut through relay members, power distribution members and relay actuation means for selectively actuating and deactuating said relay members to thereby permit reversible connection of the subscribers' lines to either of the similar generation units and the new E.S.S. units or to the earlier generation units to which they were originally connected.