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Question about broadband (cable)

I

I4AT

Platinum Member
I've had DSL all my life so I'm not too familiar with this crap, but I have 2 computers that I want connected, one upstairs and one down. The one downstairs has been running straight off the modem and I recently bought a router/adapter so I could move the modem upstairs and hardwire that computer, then run the one downstairs wirelessly.

Well I moved the modem upstairs and neither computer would connect, so after about an hour of troubleshooting I finally narrowed the problem down. The modem only receives data when connected to the cable jack downstairs where it was originally plugged in. If I use any other jack it won't receive data. Is this normal? Shouldn't the modem be able to run off any cable jack in the house?
 
If all the cable jacks are inter-connected, you should be able to use any one of them.
You need to figure out which ones are closest to the source. The farther away the weaker the signal, and that may be why you can't get connected from upstairs.
 
I tried one jack that's about 4 feet away from the one the modem does work off of and even that one doesn't work. This house is wired up kinda funky though, so maybe that has something to do with it. I dunno.
 
If this is an older cable internet account, they may have put a filter on all of the jacks but the one downstairs. My cable ISP three years ago did this. At the main junction box they put filters that wouldn't allow duplex conversations on all but one of the jacks. Mine doesn't do this now because it causes too many troubleshooting issues. That could be the cause though.
 
Hmm, I guess that's possible. Is it like a piece of hardware that I could remove myself or is it more complex than that?
 
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