The research is here: https://www.cam.ac.uk/research/news/existing-infrastructure-will-be-unable-to-support-demand-for-high-speed-internet https://www.cam.ac.uk

The research is here: https://www.cam.ac.uk/research/news/existing-infrastructure-will-be-unable-to-support-demand-for-high-speed-internet https://www.cam.ac.uk/research/news/existing-infrastructure-... I think the distance is calculated with attenuation because also a short cable can have lot of noise. But I think also the speed could be reached at longer distances than 30m, at least 200/300m