Centrally controlled change-over device

摘要

The invention relates to a centrally controlled change-over device having a multiplicity of relay-switched galvanic change-over switching points (for example uk1), combined in change-over modules (UB), for changing over lines and devices in telecommunication switching systems. To avoid having to provide an elaborate external test station, a test station (PP) is allocated to the central processor St under a predetermined address, into which test station a change-over module (UB) to be tested can be plugged, and in which arrangement, after the change-over module (UB) has been plugged in, the individual switching points (for example uk1 to uk4) are successively selected by the central processor (St). <IMAGE>