T-type switching system for broadband switching system and time

Abstract

If in a broadband switching system broadcast TV-signals are switched, then it should be preferred that they can be switched through without the risk of blocking. To achieve this it is proposed to distribute the broadcast TV-signals via a p-fold bus line (BUS.sub.1, . . . BUS.sub.64) over the 64 inputs (DTV.sub.1, . . . DTV.sub.64) of the information stores IM.sub.1, IM.sub.2, . . . IM.sub.256. Together with their associated addressing and control, these information stores IM constitute a T-type T-stage switching system. Multiplex signals coming, for example, from the series-parallel converters SPT.sub.1, SPT.sub.2, . . . of an S-stage of a TST switching system are applied to the further, for example 36, inputs (I.sub.out,1, . . . I.sub.out,36) of each information store IM. By the action of the time slot control and the addressing associated with each information store IM 36 of the 100 memory locations are read and the contents are applied to the subscribers via outgoing multiplex line OMT. An advantage applied is that all the desired broadcast-TV channels can be switched-through free from blocking.