This afternoon I heard some tinkereing outside my livingroom. Turn out there was an Xfinity van outside and a guy installing a piece on my cable connection on the exterior of my house. Said it had something to do about the modem and a buffer of some sorts. I have not gotten any message about this installation, but it seemed legit. I'm tempted to remove the piece, unless I get to know more about this. See the attachment for the piece in question.
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