I too am aware of the HD limitation of PRISM and because of that and other reasons have not switched to them. From what I know of the technology and its difference from FIOS is that FIOS is fiber all the way to the house where it is interconnected to the house's cable system - hence true broadband from end-to-end.
PRISM is fiber to a junction point some distance from the house and then uses normal phones lines with DSL technology for the remaining link. Since this junction can be some distance from the house (up to thousands of feet) and since the distance varies for different subscribers and since the number of copper pairs available for the DSL link varies is the reason why some subscribers get better service than others.
Unfortunately, since the telephone distribution network is not owned by Verizon, it is not likely that we will ever get true fiber to the house technology. I wonder if the new sections currently being built are being "wired" with fiber cables all the way to the houses or if they are continuing to use just copper. Does anyone know?
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