Remember that the items linked above are just the replacement plug-in module containing the filter. You still need the NTE into which it connects. For example:
And when you reterminate the incoming cable, connect only the orange & white to the A & B terminals on the NTE itself. Somebody connected black & green on your existing jack, but they are spare (unless you have a second line).
Of course, as this is all done entirely without BT/OpenReach approval, you're on your own if anything goes wrong.
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