How Do I Run a Cable for a TV and a Modem?

By Quinten Plummer

Use coaxial splitters with a cable modem.
i Aerial splitter 4 sockets made of metal isolated on white image by Olga Sapegina from

If you have only one coaxial outlet in the room in which you plan to use your television and cable modem, you don't have to decide which of the two is most valuable to you. Cable lines can support both your Internet connection and cable television programming without much of a noticeable loss in performance for either component. And with the help of a high quality cable splitter, you can run a single cable to the modem and television's convergence point.

Step 1

Measure the distance from your coaxial outlet to a suitable middle point between your modem and television. Follow the walls as you measure, as opposed to measuring the shortest distance. Select a length of coaxial cable that meets or exceeds your measurements.

Step 2

Connect a coaxial splitter to the coaxial outlet that's closest to your modem and television. Plug one end of a coaxial cable to the side of the splitter that has the single port. Connect the opposite end of the cable to the coaxial wall outlet.

Step 3

Connect a second section of coaxial cable to the splitter and your cable modem. Connect one end of the cable to the coaxial port on the back of your modem and connect the other end to either of the two ports on the other side of the splitter.

Step 4

Use a third section of coaxial cable to connect the coaxial port on the back of your television to the last coaxial port on the splitter.