The audio component only uses ~3 Khz of bandwidth on a copper line. VDSL uses tens of megahertz of bandwidth. For the tiny fraction you'd increase speed, you'd have to a) change the VDSL spec, and b) change an awful lot of hardware.
The audio component only uses ~3 Khz of bandwidth on a copper line. VDSL uses tens of megahertz of bandwidth. For the tiny fraction you'd increase speed, you'd have to a) change the VDSL spec, and b) change an awful lot of hardware.