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Dispersion managed spans made of standard single mode fibre (SMF) and dispersion compensating fibre (DCF) or new inverse dispersion fibre (IDF n, where n is the SMF to IDF length ratio) are compared numerically for 10 Gbit/s transmission. We show that for a single-channel system with 50 km spans, IDF 1 performs the best with NRZ transmission, but suffers from cross phase modulation (XPM) in WDM systems. IDF 2 or  3 result in increased transmission distance for single-channel RZ transmission over 50 km spans as well as irrespectively of the type of modulation for 80 km spans. Non-linear degradation is significantly reduced when using short 5 ps RZ pulses together with IDF 2 due to the high dispersion induced broadening in the SMF and lower non-linear coefficient of the IDF compared to conventional DCF

System Optimisation of Dispersion Maps using New Cabled Dispersion Compensating Fibers