How to Convert a Phone Jack to an Ethernet Jack

A DSL modem enables a computer to connect to the Internet. A telephone line must be plugged into the DSL modem in order to send and receive online signals. To convert a phone jack into an Ethernet jack that can be connected to a computer, install a DSL modem using the telephone jack in your home. A few supplies from an electronics shop are needed.

Step 1

Place the DSL modem next to the computer that will be used to access the Internet. Insert the DSL's power supply AC plug into a wall outlet. Plug the power supply's power port cable into the AC port on the back of the modem.

Step 2

Insert the modular plug at one end of a modular telephone cord into the modular socket on the telephone jack; the jack most likely is on a plate at the bottom of the wall, up against the baseboard. Insert the modular plug at the other end of the cord into the "DSL"-labeled modular socket on the back of the modem.

Step 3

Insert the Ethernet plug at one end of an Ethernet cable into the "Ethernet"- or "Network"-labeled socket on the back of the modem; the tab on the Ethernet plug must be lined up with the slot on the top or bottom edge of the socket if the two are to connect properly.

Step 4

Insert the Ethernet plug at the other end of the Ethernet cable into the "Ethernet"- or "Network"-labeled socket on the back of computer -- again lining up the tab on the Ethernet plug with the slot in the computer's socket.