H - Electricity – 04 – L
Patent
H - Electricity
04
L
344/28
H04L 12/56 (2006.01)
Patent
CA 1292054
ABSTRACT OF THE DISCLOSURE In order to enable an expansion of a packet switched network and a constitution change thereof to be readily achieved in a multistage switched network constitution, in a packet switched network including a packet data terminal, a packet switching equipment, a PBX, a multiplexer, an LAN, a voice communication apparatus such as a telephone set, and a facsimile or in a linkage between switching modules in a packet switching apparatus, the basic switching modules called configuration units connected to the network are interconnected to each other to form a hierarchic tree structure of which the number of hierarchic levels can be selected depending on a size of the packet switched network. Furthermore, in order to increase the reliability of the packet data transfer in the multi- stage switched network configuration, there are disposed a plurality of connecting lines between bit switches and upper-level configuration units so as to establish a redundant configuration.
566796
Hagiwara Masayoshi
Hayashi Kazuyuki
Horiki Akira
Sasaki Ryoichi
Sugano Minoru
Hitachi Ltd.
Kirby Eades Gale Baker
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