When you think you’ve made the most of the copper pair reach a company, in this case Nokia which shows you that you can do even more. In this case, the new protocol is called XG.Fast and allows you to carry your data connections over copper up to the impressive speed of 5 Gbps (about 625 MB per second) on routes up to 70 meters away and 8.10 Gbps on selected routes up to 30 meters . All distances which are widely respectable in high-density urban areas.
The protocol, also called G.fast2, is the successor of G.fast who had already pushed to the physical limit bandwidth use on copper cable. In practice, a normal VDSL2 connection works at the frequency of 17MHz, a G.Fast connection goes when using a frequency of 106 or 212MHz.
XG.Fast does even better and brings a bandwidth of up to 10Gbps of records threshold . At these levels there is of course a huge problem of interference either with the telephone line, that between the different cable sections from each other. Why it is necessary to increase the density of the DSLAM, special equipment located inside the peripheral cabinets, which will significantly increase the costs of infrastructure. costs that would still be lower than the laying of fiber which, as is known, has the highest percentage of its costs in the street excavation. Which raises doubts in countries like ours where you’re going ahead with difficulty in laying fiber.
The expectations are not, however, in the short term. In the United Kingdom, which in terms of connections is not comparable to Italy, the BT operator expects to increase G.Fast connections to 20 million users by 2020. The evolution of G.Fast will be then more distant in time. Hopefully, at this point, that in the meantime, Italy has taken steps decided in the laying of the fiber, at least in urban areas. The optical connection is in fact technically preferable and more forward-looking solution especially in anticipation of a future exponential increase in demand for data usage.