PCM TDM switching network

Details PCM TDM switching network PCM TDM switching network

1978-03-08

1980-01-29

Konick, Bernard

179 15AQ, H04J 300

Patent

active

041862767

ABSTRACT:
A PCM TDM switching network has a time-space-time structure composed of switch-through units which, being interlaced and released on a time basis, each operate a plurality of TDM transmission lines and TDM intermediate lines which connect the switch-through units to one another. The units effect both the time-wise and spatial assignment of time channels seized on incoming TDM lines to time channels seized on outgoing TDM lines by means of time slot conversion. The TDM transmission and the TDM intermediate lines are, in each case, connected as groups, by way of separate concentrator and distributor circuits and super-multiplex lines connected thereto which carry the interlaced items of information to the transmission memory of the relevant switch-through unit. The concentrator and distributor circuits which are assigned to the TDM transmission lines comprise cyclically operated multiplexers and demultiplexers, whereas the concentrator and distributor circuits assigned to the TDM intermediate lines are operated acyclically and their interlacing and release arrangement is modified only in the event of changes to the switching network.

REFERENCES:
patent: 3890469 (1975-06-01), Kelly et al.

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