An analytical model of copper local loop in FTTB environment

This paper introduces a very simple model of copper local loop that remains in access network after replacing copper wires from CO (Central Office) to DP (Distribution Point) with optical fibres, i.e. after implementing a FTTB (Fibre to the Building/Basement) solution. The model can be used for quick and quite reliable loop qualification and/or troubleshooting. The first part of the paper gives a short overview of copper loop model in DSL (Digital Subscriber Line) environment, its lead testing scenarios and FTTB solution. An explanation of main steps in developing of new model follows. Below that, a discussion model usability and reliability is provided. At the end an experimental verification of the model, which is based on data collecting on physical system in commercial exploitation is done.