Description

Stockholm: L.M. Ericsson, 1927. 295 by 210mm (11½ by 8¼ inches). Original illustrated wrappers; 39 pp. Thoroughly illustrated throughout with photographs and technical illustrations. Wear to extremities.

Ericsson revolutionized the world of automated telephone switching, which allowed society to move away from manually connected calls. This publication discusses at length their invention with technical detail. This system was Ericsson’s initial claim to fame and resulted in major contracts worldwide. The information was initially published in Nos. 1, 2, 7 & 8 of Vol. 1 of The L.M. Ericsson Review and then expanded for this publication.

This item is quite different from the later LM Ericsson’s automatic telephone system with 500-line selectors. The 1944 edition of that book has only 2 holdings in OCLC (all in Europe). This 1927 publication on the same topic is unrecorded in OCLC and there are no other copies currently in the trade. Interestingly, some of the technical specifications in our book were omitted from later publications.

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