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ISP Said there was signal coming from my house (alien.top)

submitted 1 year ago by Whipitreelgud@alien.top to c/homenetworking@selfhosted.forum

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My ISP is cable. Called and said they needed in my house to find the source of the signal that was affecting everyone else in my neighborhood. Literally nothing had changed and my house has been connected since 2010.

The tech arrived and I had them start outside. He replaced every connection/coupling and kept testing. After all of them were replaced, his testing machine showed a perfect signal. Noise eliminated. I was not charged for this service.

I found this baffling. My neighbor’s coax connections affect me?

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[–] Ok-Tangelo4024@alien.top 1 points 1 year ago

I work at an ISP and we have guys doing this constantly. It's not always at a customers house but yeah. A fault on the cable going to your house causes your modem to increase the power it uses to talk to the node in your neighborhood that connects back to the ISP. If your modem uses too much power and drowns out the signals from your neighbors going to the same node, then everyone else's service can suffer and yours is just fine. It's weird but that's how it is.

A connector might have gotten rusted or a landscaper might have nicked a cable with a weed Wacker or something.