Abstract: A telecommunication cable of the microcable or minicable type having optical fibers (2) contained in a thin retaining sheath (3) includes an external layer (4) extending concentrically around the retaining sheath. The external layer has a friction coefficient lower than that of the retaining sheath and a stiffness greater than that of the retaining sheath. These characteristics reduce friction and increase the stiffness of the cable when the latter is installed by blowing or floating in a conduit.

Abstract: A telecommunication cable of the microcable or minicable type having optical fibers (2) contained in a thin retaining sheath (3) includes an external layer (4) extending concentrically around the retaining sheath. The external layer has a friction coefficient lower than that of the retaining sheath and a stiffness greater than that of the retaining sheath. These characteristics reduce friction and increase the stiffness of the cable when the latter is installed by blowing or floating in a conduit.

Abstract: A telecommunication cable includes a plurality of modules, each with a thin retaining sheath for clamping optical fibers together. Each retaining sheath contains plural respective modules and is mechanically coupled to the retaining sheaths of the respective modules to form supermodules that contact an outside jacket. The retaining sheath of a supermodule includes an identification color or line to distinguish the supermodules from each other.

Abstract: A telecommunication cable comprises a very high number of modules (MO) each with a thin retaining sheath (3) clamping optical fibres (1-2) together. So as to facilitate ??ing out and identifying the modules, retaining sheaths (4) each contain a plurality of respective modules and are mechanically coupled to the retaining sheaths (3) of the respective modules to form super-modules (SM) in contact with an outside jacket (6-7). The retaining sheath (4) of a super-module (SM) comprises at least an identification color or line to distinguish the supermodule from other supermodules.

Abstract: A cable including optical fibers (1) surrounded by a sheath (2) comprising at least one layer in which at least two elongate reinforcement members (4) extend, the cross section of the sheath having a substantially oval outline (5) presenting a minor axis (5.1), and the reinforcement members being disposed symmetrically on either side of the minor axis.

Abstract: In order to prevent microcurvatures in the optical fibers when the cable is subjected to temperature variations in the range from approximately −40° C. to approximately +85° C., a cable with N optical fibers (FO) each having a core (1) and a coating (2) with coefficients of thermal expansion/compression &agr;1 and &agr;2, Young's modulus in traction E1 and E2 and sections S1 and S2 comprises a retaining sheath (3) enveloping the optical fibers buried in a filling material (4) having a coefficient of thermal expansion/compression &agr;4, Young's modulus in traction E4 and section S4. The sheath (3) satisfies the condition: (&agr;3.E3.S3)≦[(&agr;1.E1.S1)+(&agr;2.E2.S2)](N/14)+(&agr;4.E.4.S4) in which &agr;3, E3 and S3 are respectively the coefficient of thermal expansion/compression, the Young's modulus in traction and the section of the sheath.

Abstract: In order to prevent microcurvatures in the optical fibers when the cable is subjected to temperature variations in the range from approximately −40° C. to approximately +85° C., a cable with N optical fibers (FO) each having a core (1) and a coating (2) with coefficients of thermal expansion/compression &agr;1 and &agr;2, Young's modulus in traction E1 and E2 and sections S1 and S2 comprises a retaining sheath (3) enveloping the optical fibers buried in a filling material (4) having a coefficient of thermal expansion/compression &agr;4, Young's modulus in traction E4 and section S4.

Abstract: The cable includes optical fibers (1) enclosed in an outer sheath (2) having elongate reinforcing members (4) embedded therein, disposed in two diametrically opposite groups (3) each comprising a plurality of mutually tangential reinforcing members (4).

Abstract: The telecommunications cable of the invention comprises optical fibers and stabilization fibers disposed in an envelope in such a manner as to ensure longitudinal coupling therewith, such that part of the force to which the cable is subjected is shared uniformly over the fibers.

Abstract: The cable comprises at least one module (3) of fine conductors (1) each covered in a primary sheath (2), the conductors being wrapped in a supporting sheath (4) that provides mechanical coupling between the fine conductors (1), and the fine conductors (1) being coated in an oil (5) having viscosity lying in the range 100 cPo to 5,000 cPo.

Abstract: The telecommunications cable of the invention comprises a series of optical fibers which are preferably coated with respective colored identification layers, the fibers being split into modules each of which is enveloped by a thin supporting sheath that is easily torn, with different sheaths preferably being of different colors, the sheaths being in contact with the optical fibers, and a protective covering being in contact with the supporting sheaths.