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A copper-in-tube access network easy to migrate to optical fibre

  • Plumettaz SA, CH-1880 Bex, Switzerland


A network of underground ducts containing bundles of guide tubes coupled by simple connectors, such that individual routes are formed in the branched access network. In these routes small copper twisted pair cables can be installed, by blowing. Or small optical cables. Or the copper cables can be replaced by optical cables. An operational pilot is described.
... Small, but outside plant resistant (handling and environment), optical cables (2-48 fibres) can be installed spliceless in the now created dedicated guide-tube links, e.g. using compressed air. The concept is based upon JETNET ® [1,2,3] ( ® JETNET is a registered trademark of KPN Koninklijke PTT Nederland) which was developed to migrate the copper network to an optical network at future need. For the all-optical METRO-net ® the fibre density of the cables and the maximum installation lengths have been enlarged. ...
Conference Paper
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Today's technology of optical cabling is not ideally suited for use in ac-cess networks. In this paper an alternative approach is presented where individual miniaturised cables are installed in dedicated mini-tubes. The proposed concept not only equals the functionality of the current copper network, with its numerous branches. The versatile concept also allows growth of the network in a competitive market, where initial costs shall be low.
COST 246 is concerned with the study of the reliability of components for the optical network. Components that are studied include optical fibres, splices, passive and active optical components. This work is carried out by the various Working Groups (W.G.) which make up COST 246. WG1.2 “Cables and Outside Plant” concentrates mainly on the Outside Plant (OP) components that surround the components studied by the other Working Groups within COST 246. Examples of such components include ducts, cables, splice boxes and pedestal cabinets.
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