Connecting the wall port to internet is a different issue that we can t solve for you.
Connect ethernet cable to wall.
Solution connect one end of the coaxial cable to the cable wall outlet.
Connect the other end of the cable to the modem.
My house uses ethernet wiring for both internet cables and phone lines.
Running cable to the jack 1.
If you are using a separate wireless router use an ethernet cable to connect from the modem to the internet port on your router.
Drill a hole in the floor or ceiling behind your jack outlet if necessary.
Once you have all the cables connected you can mount the patch panel to the wall and click the jacks into their respective wall plates on the other ends.
Secure the mounting bracket.
You can also screw the wall plates into.
Run your ethernet cable from your networking hardware to the jack outlet.
A lot of modern modems act as a wireless router.
Most units have built in splitter to pass through coax to a tv box or cable modem.
The ring signal is typically 20 volts which will fry the ethernet circuits.
Simply connect an ethernet cable from the ethernet port on your computer to any available ethernet port on the back of your gateway.
Connect the cable dsl or fiber optic line from the wall to your modem step 2 connect your modem to the router.
You can plug an etnernet cable into the wall but the result may be unpredictable.
The internet port may be labeled internet wan uplink or wlan.
Setup is even easier than powerline just screw in the coax cable plug in ethernet and power on.
Connecting the pc to the wall port needs just a cable assuming it s a rj45 port.
Ethernet ports are the yellow ports found on the back of your at t gateway.
No issues with interference etc.
Just plug one into your wall in the room with your router connect it to your router with an ethernet cable and plug the other one in the wall next to your far away devices.
Step 1 connect your modem to the internet cord.
If i plug a computer into a phone jack my computer will be damaged when i receive the next phone call.
If you are not using an external wireless router go ahead and skip this step.