Telephone jack to ethernet adapter

I live in a house built in , and when we got rid of our landline around , I knew I wanted to try converting all our unused phone jacks in the walls to ethernet someday. After 7 years of thinking about it off and on, I finally got it done today.


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I should have done it ages ago. I build internet stuff.

View all posts by mathowie. Like Like. Thank you so much for posting this, I just checked and there was Cat 5e in the walls! I thought it would be a nightmare to wire my house. Telephones use two wires. Therefore, you can run both ethernet and telephone over the same wire, and still have two wires left over. In fact, you could run two Ethernet jacks from a single cat-5 cable, or four telephone lines though I don't know why you would run multiple phone lines. Note that I have not done extensive testing with cross-talk between phone and ethernet, though I have seen no degradation in the quality of either when both are in use.

Also note that this procedure will not work with PoE Power over Ethernet devices. Nothing bad will happen, it just won't transmit power. See step 13 for a possibly unsafe way to keep your PoE and add phone service. Also, it will not work with gigabit ethernet-- gigabit ethernet uses all four pairs. Unscrew your plate from the wall. Pop out the RJ port, and pull the wire out from the wall as far as you can. At this point, you need to establish a standard way of wiring the phone jack.

It is a completely arbitrary choice. This must be done in the same order on every connection see above. Use a knife to trim the extra. Once this is done, reassemble the jacks using a faceplate with one additional hole.

Converting phone lines to ethernet in newer homes – A Whole Lotta Nothing

This end of the connection is now done. You will need to find the origin of the chosen cable. Mine were conveniently labeled and came with a paper showing where each one goes. If this is not the case for you, you may have to trace them using a cable tracer. You can borrow this from your local networking guru. My cables were terminated with RJ plugs. If you have jacks or loose wires, your job is easier. Once you have located the other end of your cable, remove it from the panel.

If possible, bring it to a flat surface you can work on. Take a phone cable and cut it in half. You only need half of a cable per jack.

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Inside you should find two wires surrounded by a jacket, similar to Cat 5 cable. Carefully cut and peel back the jacket, leaving an inch or two of wire sticking out. Trim the excess jacket. You need to figure out which wire in the phone cable is red and which is green. Mine were both physically colored black. To figure this out, you can find a phone cable that does have colored wires and use it for reference you can see the colors sticking into the clear jacks.

You can also search online or use the picture provided here. Plug the RJ plug into a router or switch, and your computer into the RJ jack. Test this connection. Plug the RJ plug the one on ex-telephone cord into the phone junction panel. Plug a phone into the RJ jack. Listen for a dial tone.

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If both connections work, congratulations! You can get pretty fast at the process and do each jack in half an hour or less. If the ethernet connection does not work, you need to find the problem in the wires. You may have accidentally cut an important wire trying to remove the brown pair from the jack.

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You may have also done this where you tried to remove the cable jacket. In most cases, the only good way to fix this is to re-crimp the terminator onto the cable. Other fixes such as soldering will greatly degrade the quality of your connection. Remember that twisted-pairs in an ethernet cable can only be untwisted for half an inch on each end of the cable, or else crosstalk will occur.

If the phone connection has problems, first examine the physical wires.


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Most likely the bending or cutting of these wires has caused a break in them. If you find a break, it is acceptable to solder it to fix it-- phone is not as high-quality as ethernet. A multimeter may be helpful here.

Ethernet Adapter Phone Jacks

Afterwards, check that your wires are attached to the proper place on the jack. One wire should go to the red terminal, and one to the green terminal. Do not confuse the green terminal with the solid green Cat 5 wire. Finally, check that your wires are the same on both ends-- that is, brown striped to red, solid to green. Most likely it is a different problem, as long as you were diligent enough to double-check all the orientations.

Power over Ethernet is a technology that allows ethernet devices such as access points to operate without the need for wall power. It is not used widely except in businesses. No wires to run at all. Another wired alternative is to use powerline ethernet adapters.

These adapters use your house's existing electrical wiring for networking, but it depend on how your house is wired, how good the cable is, etc. I don't type fast enough. Personaly I like Linksys Wireless G Routers, and if you dont want to go through the hassle of opening up the computer, you can always install a usb wireless adapter, or if you feel comfortable with opening up the case, then a pci wireless card will work. Any of the models from Linksys, Netgear, or D-Link will work just fine.

The Apple Airport Extreme is also a good model, but it's tad pricey in my opinion. I'm personally partial to the Linksys line. However, since you'll be going wireless, the ethernet speeds are irrelevant. Linksys is probably the most popular brand and they are very dependable.

Turn on suggestions. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Showing results for. Search instead for. Did you mean:. Sign In. Possible to convert phone lines to ethernet jacks? Regular Contributor. We have unsed phone lines in our house. Is it possible to convert these unused phone lines to ethernet jacks? Go to best answer. Problem Solver.