. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. Transatlantic Telephony—the Technical Problem By O. B. BLACKWELL Synopsis: This paper, which, as it was read, was prefatory' to the joint meeting, describes in rather non-technical terms the engineering problems involved in developing the transatlantic radio trunk by means of which the American telephone system of some 18,000,000 stations can communi- cate with the English telephone system of about 1,500,000 telephones, and also with the telephone systems of other Euro
. The Bell System technical journal. Telecommunication; Electric engineering; Communication; Electronics; Science; Technology. Transatlantic Telephony—the Technical Problem By O. B. BLACKWELL Synopsis: This paper, which, as it was read, was prefatory' to the joint meeting, describes in rather non-technical terms the engineering problems involved in developing the transatlantic radio trunk by means of which the American telephone system of some 18,000,000 stations can communi- cate with the English telephone system of about 1,500,000 telephones, and also with the telephone systems of other European countries. WE wish to give you a picture, necessarily very briefly sketched, of the physical makeup of the transoceanic telephone circuit, why it has been given its present form, and what further improvements are expected as the result of development work now under way. The problem in brief is suggested by Fig. 1. A telephone system in America of some 18,000,000 stations, and distances of upwards of 3,000. Fig, 1—Map showing U. S. and European telephone systems separated by ocean miles. A telephone system in England of about 1,500,000 telephones and the possibilities already partly realized of wire extensions to the other European nations. Three thousand miles of ocean between these two systems. The establishment of a connection across the ocean presented two problems. First, the problem of setting up the radio circuit between the United'States and England and second, the problem of making this radio circuit function as a link between these two widely extended telephone systems. Fig. 2 shows the geographical layout of the long wave transoceanic circuit. The course followed by the currents in a connection is as follows: voice currents originating at any substation in America are 168. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfect
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
