Circuit arrangement for the reception and forwarding of message signals in time division multiplex exchange stations

Claim 1

In a telecommunication exchange circuit means for completing a connection for message signals having a plurality of transmission paths, each path having arriving and departing lines for conducting message signals separately in arriving and departing transmission directions, respectively, wherein when a connection is established, a time channel is assigned in a pulse frame of said arriving line and the next free time channel is assigned to a pulse frame in said departing line so that the same time channel is used in both transmission directions for the pulse frames for each direction, and wherein the pulse frames for said arriving and departing lines are, respectively, synchronized with one another utilizing delay links inserted into said arriving lines, said delay links being dimensioned as to produce a time delay so that the corresponding pulse frames of said departing lines possess time positions different from the time positions of the pulse frames in said arriving lines, said delay time being determined by the desired mean total time interval between assigned time channels, the improvement comprising: a plurality of differently dimensioned intermediate line pairs in the connection switching matrix for such an exchange station, said line pairs including intermediate stores having storage times complementary to one another, a plurality of first coupling point switches for connecting said arriving lines to said intermediate line pairs, a plurality of second coupling point switches connecting said intermediate line pairs to said departing lines, said arriving and departing lines having corresponding pulse frames being connected via one of said first and one of said second coupling point switches and an associated intermediate line pair to form a transmission path, a plurality of common address storage means, one of which is coupled to and in common with each said transmission path, first decoder means for each transmission path having outputs connected to said first coupling point switches and an input connected to said common address storage means associated therewith, delay means having a delay time corresponding to a pulse frame delay time coupled to the outputs of said first decoder means and second decoder means for each transmission path, each having a plurality of outputs for said second coupling point switches in the transmission path associated therewith, the inputs of said second decoder means being coupled through said delay means to said first decoder means inputs.