平面移動掛列型態分時多工交換網路新線路設計

Abstract

平面移動排列(planar shifting array)型分時多工交換網路( time division multiplexed switching network)是1973 年R.S. Krupp 及 L.A.Tomko在 BSTJ發表的一種分時多工交換方式。它是利用時孔交換器(time slot interchanger)與並串轉換器(parallel-serial converter)來達成時空交換之目的。筆者應用該文的分時多工交換方式，用邏輯電路來設計此型交換網，並說明並串轉換器利用前級時孔交換器之電路略加擴展，即可包含並串轉換器之功用而不必另設並串轉換器。本文分三段、第一段說明平面移動排列型分時多工交換網路之結構，第二段敘述時孔交換器之設計，第三段敘述複合式時孔交換並串轉換器之設計。

A switching network using planar shifting array was first published in BSTJ by R.S. Krupp and L.A.Tomko in 1973. They proposed a time division multiplexed switching network using TSI (time slot interchanger) and PS (parallel-serial converter) as building blocks. A design having cost advantage over the foregoing-mentioned technique is presented in this paper. Standard commercially available logic circuits are utilized to realize the TSI, PS and the entire switching network. It is noticed that in the present design the PS circuit is combined into the TSI circuit of the proceeding stage, thus reduces the number of parts needed and in turn decreases the cost.