Modern submarine cable telephony and the use of submerged repeaters

With the growth of inter-continental service the provision of large numbers of circuits on submarine cables will probably become a major problem in post-war telephony, as radio telephony is unlikely to meet all requirements. In this paper, an account of the present position of submarine-cable telephony is given, and the problem of the increased utilization of cables is examined. Major progress now turns mainly on the development of suitable submerged repeaters, and details are given of a repeater recently laid in the Irish Sea by the British Post Office. This repeater is suitable for comparatively shallow waters only, but is believed to be the first submerged repeater to be included in a working cable system. By its introduction the traffic capacity of the cable has been increased from 24 to 48 circuits.