Abstract:SynopsisThe advantages are examined of a sectionalised main-/dependent-exchange complex for a local-exchange area, together with the particular suitability of a p.c.m. switching section in the main exchange. The dependent exchanges, which may be linked to the main exchange by audio or p.c.m. junctions, use a spatial system of concentration with reed-relay crosspoints, and operate as remote reed-electronic exchanges (REX) controlled by the main exchange. The dependent exchange therefore has all the advantages a… Show more
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