Submarine optical fiber line with interconnected different cable types

A submarine telecommunication line comprising optical fibers in accordance with the invention comprises opto-electronic repeaters (6,7,8,9), of the type provided with a metal envelope (10) able to withstand the mechanical stresses applied onto it, to which are connected a section of an optical fiber cable (1,5), of the type in which the mechanically resistant armour surrounds the optical fibers and a section of an optical fiber cable (2,3,4), of the type in which the mechanically resistant armour is constituted only by a rope (12) which occupies the radially innermost portion of the cable and is surrounded by the optical fibers of the latter.