Switching arrangement for communication of digital signals,...

Details Switching arrangement for communication of digital signals,... Switching arrangement for communication of digital signals,...

H - Electricity

04

J

344/25

H04J 3/06 (2006.01) H04M 9/02 (2006.01)

Patent

CA 1267962

ABSTRACT An improved switching apparatus, having group couplers and a loop arrangement including a plurality of single loop lines, for communication of digital signals, particularly PCM signals, each comprising several bits at a fixed transmission rate to or from connection circuits connected to a plurality of group buses on each of which digital signals can be transmitted in parallel in a pre- determined number of time compartments in cyclic repitition in pulse frames. The group buses are connectable by way of a respective one of the group couplers to the line segments of a respective main bus associated with one of the main couplers connected to segments of the central loop arrangement. The two line segments of each main bus serve to transmit digital signals in different directions. This improved apparatus considerably expands the connection facilities for the several connection circuits over earlier switching apparatus employing group couplers and a loop arrangement.

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