Estimation of ADSL and ADSL2+ Service Quality

In this paper, estimation of ADSL and ADSL2+ service performances is presented. Since the transmission medium quality is one of the key requirements for performance capabilities of these services, an analytical method for modelling of primary per-unit length parameters of twisted pair is described. This model is implemented in the existing software extended to allow for estimation of data rates on telephone subscriber loops for xDSL service. For the example of particular twisted pair telephone cable, an experimental measurement of its parameters is done, which is followed by their modelling using described software. At the end, comparison of experimental and modelled results of capacity for specific cable is presented.