Can a cable modem be connected to any wall jack that a TV works in any room?

Or does the Cable modem need to be isolated back to the coax coming in from the street and a special splitter needed.

Thanks

I believe that the internet signal is available on all your coax jacks so you can connect your modem to any one of them. If you are looking to have a TV and internet connection off the same jack then, yes, you'll need a splitter.

For there to be wall jacks, would mean that the house is wired with coax cabling. Therefore, the cable is coming from the outside of the house into a distributor that is connecting to the wall jacks. Now its possible not all the jacks are connected back to the distributor. But if a TV works in that room then it is.

In that case you can plug a cable modem in instead of a TV or use a splitter to run both.

As a kicker, its possible that the distributor is rated only for TV signals. In that case you may need to isolate the line.

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Originally Posted by loupi01

Can a cable modem be connected to any wall jack that a TV works in any room?

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Nope

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Or does the Cable modem need to be isolated back to the coax coming in from the street and a special splitter needed

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Yep

Thanks Scott,
I have not seen a splitter that advertises to split TV and Internet Signal.

There isn't one. The signals are sent over the same cable. It's the modem that filters out the data packets from the video just as the settop box does the opposite.

I agree with Scott completely. If your TV works on a cable outlet in your house then so will your cable modem. The Coax cable that carries your TV channels also carries your Internet traffic. Same cable, nothing magical about it.

Your cable company has a lot of bandwidth that they can use on a single Coax cable. It allocates each TV channel into a 6Mhz band and multiplexes all the channels on the Coax. Your Internet connection is also allocated a 6Mhz band and is muxed in along with all the other channels onto the Coax. It is your CableModem's responsibility to tune to the right frequency to extract the channel that it needs. There is actually a tuner inside the cable modem that does that part for you. Now inside the 6Mhz channel you use some of the bandwidth for uplink and some for downlink. That's basically, and over simplistically, how it works.

There are no special splitters required other than to extend the coax to multiple locations in the house which has nothing to do with splitting the signal.

Thank you everyone for your help...

I think you can use any. Because even for TV signal, most companies use digital. So all the outlets are sending/receving data.