Go to your network interface (if you have one) on the outside of your home, usually near the electric meter. Open the cover, you'll need a butter knife. Open the panel "Customer Access".
Notice what colors are attached to the two posts, usually orange and orange/white striped.
Then go back to your jack and put the same colors as in the network box to the green and red wires on the jack.
You should hear the dialtone.
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