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Originally Posted by altis
The small white box on your wall contains an isolator so there is no DC connection between your earth and the NTL cable. This is a legal requirement for all cable systems.
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Do you mean the NTL junction box? I think they only installed an attenuator in there. I don't think it's an isolator. I might be wrong, but I think the little in-line gizmo has a metal construction like the one on the back of my modem (I had a strong signal), so that wouldn't isolate the screen.
If the coax cable screen was isolated from the network, why do I get the buzzing noise on my speakers when I attach the coax screen to the modem?
Hmmm, I'm confused.