In [4] a calculation method is suggested to estimate the power consumption per subscriber of the Internet. Based on this method, we estimate that at ADSL access bit rates (8 Mbps) the core consumes about 0.24 W/Subs. When accounting for an increase in access bit rate to 100 Mbps this will increase to approximately 3 W/Subs. We have indicated these values in Fig. 3. At present, the power consumption in core networks is significantly lower than the access network.