Loosen and remove the screws holding the cover over the network interface box. Open and remove the cover.
Locate the grounding clamp at the inside bottom of the network interface.
Feed one end of the copper wire up through an access hole in the bottom of the network interface box and over to the grounding clamp.
Slide the end of the wire under the clamp, and tighten the screw down to press the clamp against the wire and secure it in place.
Locate an area about 1 to 2 feet away from the network interface box, and clear of the foundation of the house. Using the sledge hammer, driver the grounding rod into the ground until about 4 inches are left protruding out of the ground.
Route grounding wire down to the rod, and cut any excess wire away. Slide the wire clamp over the wire and rod and tighten the screw down to squeeze the rod and wire together to form a tight connection.
Replace the network interface cover back over the box, and insert the screws into each hole and tighten them down.