Re: The 48V is needed in case of emergency
That's only true for local loop phone service. For internet it doesn't matter - when you lose power to your house, you can't use internet anyway.
If everyone's house supplied power to the node, then if a dozen people had their computer along with their CPE on a UPS they would power the node so they could continue to use their computer even when the power went out. But I doubt they care enough to bother implementing this - I've been on VDSL2 for almost a decade, and while I rarely lose power, when I do my internet usually goes even though I've got my DSL modem, switch, wireless router and computer on a UPS. The node is a little over half a km away from me, so most power outages that affect me would affect it as well.