What are you on about? (And I speak as a non-telecomms engineer):-
My infill cabinet does not have 1 single vdsl signal running through the 100 E side cable supplying it from the other fttc cab 2.5 miles away
I assume the cable you refer to runs from the existing PCP to the infill one. That will be carrying the PSTN signal. There is certainly no cable ever going to be carrying VDSL2 (not VDSL by the way) to the infill cabinet from anywhere never mind from the FTTC cabinet. That would be pointless.
..., and when it is made live to order, it will not speed up a single line that already has vdsl on it as the nearest place that does have vdsl before this cabinet is 1.5 miles away.
So you believe. I find it hard to accept that's true, as nothing else you say in this post makes sense, but it is possible.
Every single All In One PCP i have worked in is fed from another pcp. So the routing on them and this one will be for example,
MDF Bar Pair A/100 to PCP1 E100-D100 to PCP2 (Infill) E100-D200 DSLAM E200 to copper D100 to DP100.
Quite. Though the detail is above my knowledge. (You have worked inside
infill cabinets? That is interesting, and makes your ignorance very odd). I believe you describe there the PSTN link, as I suggested above, from the existing PCP to the infill. Whereas you said it comes from the existing FTTC cabinet. I assure you nothing at all comes from the existing FTTC cabinet to the infill one.
The infill cabinet will be receiving a direct fiber-optic cable from an aggregation point, and fibre-optic cables do not carry VDSL2.
This may or may not be the same aggregation point as the existing FTTC cabinet is fed from. The infill cabinet DSLAM takes in that fiber-optic feed and outputs VDSL2, which it merges with the PSTN signal and forwards to the D-side. And vice versa for the return path.
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Edited by RobertoS (Thu 08-Mar-18 00:21:52)